# data[].attributes.body
What is gravity?

Why do certain things fall more quickly than others?

What is gravitational force?

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What Is Gravity? | NASA Space Place – NASA Science for Kids

Physics for Kids: Gravity (ducksters.com)

Gravity | TheSchoolRun

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Video Link: Science Trek | Gravity! | PBS

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·       What is force?

·       How many types of forces are there?

·       What is the difference between contact and non-contact forces?

·       Why does a moving ball come to a stop?

·       What is Friction?

·       What is kinetic and potential energy?

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https://kids.britannica.com/students/article/force/323538#:~:text=Simply%20stated%2C%20a%20force%20is,magnitude%20(size)%20and%20direction.

https://www.coolkidfacts.com/facts-about-force-push-and-pull/

https://www.physicsclassroom.com/class/newtlaws/Lesson-2/The-Meaning-of-Force

https://www.teachoo.com/10069/3018/Force/category/Concepts/

https://kids.britannica.com/kids/article/friction/442495

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Cambridge Dictionary | English Dictionary, Translations & Thesaurus

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The most popular dictionary and thesaurus for learners of English. Meanings and definitions of words with pronunciations and translations.

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Designed for children K-2 and for young English Language Learners, ( WILD is Wordsmyth's most exciting, colorful, and interactive dictionary. WILD comes free with your Wordsmyth subscription. Read more...)

New! WILD Word Learner is an educational game app that is a companion to the WILD dictionary. Children choose from among 12 topics that cover nearly 200 lists of words from WILD.

For kid-friendly definitions and example sentences for older children, try Wordsmyth's Word Explorer Children's Dictionary, containing over 14,000 entries, each with human-voiced audio pronunciations. The dictionary also includes synonyms and antonyms, word histories, geographical entries with maps, and abundant illustrations.

Unique to our Children's Dictionary is the Word Explorer, a word-finding and knowledge-exploration feature. It is an index of related words, integrated within entries, that allows a child to find words connected with multiple topics and to explore whole networks of words and their meanings. Check out the Word Explorer topics below!

Word Explorer topics list and keywords

For middle school and high school students, Wordsmyth offers its Advanced Dictionary with nearly 60,000 headwords, integrated thesaurus, and an abundance of example sentences and images. The Advanced Dictionary is part of our Comprehensive Dictionary Suite, which also contains both an intermediate level (Children's) as well as a beginner level for older English language learners. The linking of the three dictionaries allows for easy navigation between the levels.

( Subscribe to Wordsmyth to get Spanish and Chinese support, roots and affixes study feature, word-combining information, and marking of grammatical patterns in examples sentences. A parental filter is also available in the Settings with your subscription. Read more...)

The Comprehensive Dictionary Suite has a companion app available for both Android and iOS devices. The app provides for a better user experience on mobile devices and is accessible with or without the internet. ( Read the full description)

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Wordsmyth Word Explorer Children's Dictionary; WILD dictionary K-2 | Wordsmyth

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Best online English dictionaries for children, with kid-friendly definitions, integrated thesaurus for kids, images, and animations. Spanish and Chinese language support available

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What are the three laws of motion by Isaac Newton?

·         What happens when two objects collide?

·         How does Newton's First Law of Motion affect everyday objects and activities around us?

·         Can you provide real-life examples that illustrate Newton's Third Law of Motion? How are action and reaction forces present in everyday situations?

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https://www.ducksters.com/science/laws_of_motion.php

https://kids.kiddle.co/Newton%27s_laws_of_motion

https://edcraft.io/blog/all-articles/3-newtons-laws-with-real-life-examples-for-kids

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By Amy Cowen on April 29, 2022 3:00 PM
Use these free STEM lessons and activities to teach about Newton's laws of motion.
Newton's Laws of Motion in the K-12 Classroom

Across all grade bands, students explore science related to forces, motion, and interactions between objects; concepts that use Newton's laws of motion as a fulcrum for understanding forces and motion; inertia and equilibrium; the relationship between mass and acceleration; the difference between acceleration and velocity; and how to predict whether objects will move, continue to move, or stop moving and why. (Jump to a summary of NGSS standards related to Newton's laws of motion)

Together, Newton's laws of motion describe inertia (the resistance of an object to a change in motion); the relationship between force, mass, and acceleration; and action-reaction force pairs respectively:

Newton's first law of motion: Unless acted upon by an unbalanced force, an object at rest stays at rest, and an object in motion stays in motion at the same speed and in the same direction.

Newton's second law of motion: The acceleration of an object depends on the mass of the object and the amount of force applied. From this law, we derive the following equation: Force = mass × acceleration (F=ma).

Newton's third law of motion: For every action, there is an equal and opposite reaction.

The free STEM lessons and activities below help students explore Newton's laws of motion and discover how these laws explain how an object in motion or at rest behaves and what happens when an unbalanced force is applied to an object. At the bottom of this resource, you will find additional background information related to teaching Newton's laws of motion in K-12, NGSS information, and a list of key vocabulary words. For students looking for science projects, we have also included a list of independent science and science fair projects that relate to Newton's laws of motion.

Note: Science Buddies Lesson Plans contain materials to support educators leading hands-on STEM learning with students. Lesson Plans offer NGSS alignment, contain background materials to boost teacher confidence, even in areas that may be new to them, and include supplemental resources like worksheets, videos, discussion questions, and assessment materials. Activities are simplified explorations that can be used in the classroom or in informal learning environments.

All 3 of Newton's Laws of Motion Demonstrated in One Activity - Balloon Cars

Most of the activities and lessons below focus on one or two of the laws of motion. The Build a Balloon Car activity specifically talks about all three of Newton's laws of motion students can observe when building and experimenting with a simple balloon-powered car. This is an accessible hands-on activity that uses recycled materials and balloons for a fun combined engineering design project and physics experiment. The activity can be used with a wide range of grade levels to introduce and demonstrate the laws of motion. See the "Digging Deeper" section for a straightforward discussion of how each law of motion can be identified in the balloon car activity. (For a related lesson plan, see Balloon Car Lesson Plan, which is NGSS-aligned for middle school and focuses on the third law of motion.)

Lessons and Resources to Teach Newton's Laws of Motion

First and Second Laws of Motion

1. Targeted for early elementary school, the Push and Pull lesson guides students in an exploration of the push and pull forces. This lesson works in tandem with the companion Push, Pull and Weight lesson. Educators can use these lessons to teach about the first and second laws of motion. Questions: Does the ball ever move on its own? What happens when you push the ball harder?

2. In the Push and Pull Forces: What Makes Things Move? video lesson students play a game rolling balls to explore how pushing and pulling affects an object's motion. Questions: How will an object move when a push or pull force is applied to it? Is a push or pull needed to stop or start an object's motion? Why or why not? ( Tip! Click play on one of our video lessons, and we'll guide students through the science and a hands-on exploration.)

Third Law of Motion

Teaching About Newton's Laws of Motion in K-12

In learning about Newton's first law of motion, students observe and discuss forces like drag, friction, and gravitational forces. They differentiate between velocity and acceleration and learn to correctly identify acceleration as a change in motion that may be caused by an unbalanced force acting on an object. When an unbalanced force is applied, an object may be put into motion (from rest) or may accelerate or decelerate in response to the unbalanced force.

In learning about Newton's second law of motion, students make the connection between an object's acceleration, its mass, and the strength of the unbalanced force that is causing a change in motion. This relationship forms the basis of the force = mass × acceleration equation (or F = ma). Using Newton's second law of motion, students can calculate and compare how much force is required to achieve a certain acceleration based on an object's mass.

In learning about Newton's third law of motion, students identify and explore action-reaction force pairs. Students can observe "equal and opposite reactions" in everyday actions like jumping but can also see the third law of motion demonstrated in how rocket launchers work.

NGSS Standards and Newton's Laws of Motion

Middle and High School

NGSS standards specifically call out disciplinary core ideas related to Newton's laws for middle school and high school in PS2.A:

MS PS2.A.1: Forces and Motion
For any pair of interacting objects, the force exerted by the first object on the second object is equal in strength to the force that the second object exerts on the first, but in the opposite direction (Newton's third law).

MS PS2.A.2: Forces and Motion
The motion of an object is determined by the sum of the forces acting on it; if the total force on the object is not zero, its motion will change. The greater the mass of the object, the greater the force needed to achieve the same change in motion. For any given object, a larger force causes a larger change in motion.

HS PS2.A: Forces and Motion
Newton's second law accurately predicts changes in the motion of macroscopic objects.

The following middle and high school performance expectations are explicitly defined in the context of Newton's laws of motion:

MS-PS2-1
Apply Newton's Third Law to design a solution to a problem involving the motion of two colliding objects.

MS-PS2-2
Plan an investigation to provide evidence that the change in an object's motion depends on the sum of the forces on the object and the mass of the object. (See NGSS "clarification statement" for Newton's laws references.)

HS-PS2-1
Analyze data to support the claim that Newton's second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.

Elementary School

While NGSS doesn't specifically reference Newton's laws in other standards, Newton's laws of motion are observed when exploring forces and motion and are evidenced even in early elementary experiments related to forces like push and pull. Newton's laws are addressed conceptually in the following elementary school standards:

Disciplinary core areas:

K-PS2.A: Forces and Motion
Pushes and pulls can have different strengths and directions.
Pushing or pulling on an object can change the speed or direction of its motion and can start or stop it.

K-PS2.B: Types of Interactions
When objects touch or collide, they push on one another and can change motion.

3-PS2.A: Forces and Motion
Each force acts on one particular object and has both strength and a direction. An object at rest typically has multiple forces acting on it, but they add to give zero net force on the object. Forces that do not sum to zero can cause changes in the object's speed or direction of motion.

Performance expectations:

K-PS2-1
Plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object.

K-PS2-2
Analyze data to determine if a design solution works as intended to change the speed or direction of an object with a push or a pull.

3-PS2-1
Plan and conduct an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object.

Consult the Next Generation Science Standards for additional/complete information regarding performance expectations and disciplinary core ideas.

Note: For additional educator resources to teach about energy or forces of motion, see:

Projects for Student Exploration

Students interested in physics and engineering can explore Newton's laws of motion with independent science and science fair projects like these:

Vocabulary

The following word bank contains words that may be covered when teaching about Newton's laws of motion using the lessons and activities in this resource.

Acceleration

Action

Center of mass

Classical mechanics

Deceleration

Force

Force pair

Inertia

Law of motion

Linear

Magnitude

Mass

Momentum

Motion

Newtonian mechanics

Newton's first law of motion

Newton's second law of motion

Newton's third law of motion

Reaction

Scalar

Speed

Unbalanced force

Velocity

Thematic Collections

Collections like this help educators find themed activities in a specific subject area or discover activities and lessons that meet a curriculum need. We hope these collections make it convenient for teachers to browse related lessons and activities. For other collections, see the Teaching Science Units and Thematic Collections lists. We encourage you to browse the complete STEM Activities for Kids and Lesson Plans areas, too. Filters are available to help you narrow your search.

You Might Also Enjoy These Related Posts:

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Teach About Newton's Laws of Motion | Science Buddies Blog

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Teach K-12 students about Newton's Laws of Motion with free hands-on STEM lessons and activities!

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https://orise.orau.gov/resources/k12/lesson-plans.html

https://www.parents.com/kids/education/math-and-science/5-fun-stem-crafts-for-kids/

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By Amy Cowen on November 11, 2020 12:00 PM
Use these free lesson plans and hands-on activities to explore potential and kinetic energy with students!
What happens when you stretch a rubber band and let it go? Why? Explaining how energy is stored and transferred and how that relates to the movement and momentum of objects in motion involves understanding potential and kinetic energy. This is an area of science where getting hands-on with the storage, transfer, and release of energy really helps students connect with what is happening. When students stretch something, and it flies into the distance, or roll a marble down a paper roller coaster and watch to see if it can travel up the incline of a loop, they see the science in action and can investigate, hands-on, how changing different variables affects the speed, distance traveled, or momentum of an object.

These activities and NGSS-aligned lesson plans help educators create hands-on learning opportunities to teach about potential and kinetic energy in the classroom, as part of remote learning, or for independent or family exploration at home.

Note: Science Buddies Lesson Plans contain materials to support educators leading hands-on STEM learning with students. Lesson Plans offer NGSS alignment, contain background materials to inspire confidence in teachers even in areas that may be new to them, and include supplemental resources like worksheets, videos, discussion questions, and assessment materials.

Lesson Plans and Activities to Teach About Potential and Kinetic Energy

1. With the Paper Roller Coasters: Kinetic and Potential Energy lesson (or activity), students build their own model paper roller coasters and explore how conservation of energy applies in terms of gravitational potential energy, kinetic energy, and friction. What determines if a marble can make it from the start of the roller coaster to the end? Can it do a loop?

2. With the Design a Paper Airplane Launcher lesson, students learn about potential and kinetic energy as they use the engineering design process to build a paper airplane launcher. (An activity is also available for informal use.)

3. With the Build a Rubber Band-Powered Car activity, students design and build a car with wheels made from compact discs (CDs) and an axle that uses a rubber band to store and release energy. They learn about potential and kinetic energy as they wind up the axle and test to see how far the car goes.

4. With the Ping Pong Catapult lesson, students experiment with the Ping Pong Catapult to explore potential and kinetic energy by launching ping pong balls. (There are multiple student projects that use the Ping Pong Catapult and might also be useful in your classroom exploration.)

5. With the Balloon Car lesson or activity, students design, build, and race balloon-powered cars. What design choices will result in the most available energy for the car?

6. With the Swinging Pendulum lesson, students learn how energy is converted from potential to kinetic and back again by studying the movement of a pendulum. What does the height of the swing have to do with the energy?

Thematic Collections

Collections like this help educators find themed activities in a specific subject area or discover activities and lessons that meet a curriculum need. We hope these collections make it convenient for teachers to browse related lessons and activities. For other collections, see the Teaching Science Units and Thematic Collections lists. We encourage you to browse the complete STEM Activities for Kids and Lesson Plans areas, too. Filters are available to help you narrow your search.

You Might Also Enjoy These Related Posts:

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12 Activities and Lessons to Teach Potential and Kinetic Energy | Science Buddies Blog

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By Amy Cowen on November 11, 2020 12:00 PM Use these free lesson plans and hands-on activities to explore potential and kinetic energy with students! What happens when you stretch a rubber band and let it go? Why?

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What is Photosynthesis? Explain the process in detail.

What part of the plant does photosynthesis occur *?

What is the role of Chlorophyll in Photosynthesis?

Where do plants get the carbon dioxide they need to survive?

What will happen if all plants on earth die?

How do underground plants survive?

Does photosynthesis occur in desert plants?

# data[].attributes.body
https://www.livescience.com/51720-photosynthesis.html

https://education.nationalgeographic.org/resource/photosynthesis/

https://www.ducksters.com/science/photosynthesis.php

https://eartheclipse.com/science/biology/photosynthesis-desert-plants.html

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algae: Single-celled organisms, once considered plants (they aren't). As aquatic organisms, they grow in water. Like green plants, they depend on sunlight to make their food.

atom: The basic unit of a chemical element. Atoms are made up of a dense nucleus that contains positively charged protons and uncharged neutrons. The nucleus is orbited by a cloud of negatively charged electrons.

ATP: Short for adenosine triphosphate. Cells make this molecule to power almost all of their activities. Cells use oxygen and simple sugars to create this molecule, the main source of their energy. The small structures in cells that carry out this energy-storing process are known as mitochondria. Like a battery, ATP stores a bit of usable energy. Once the cell uses it up, mitochondria must recharge the cell by making more ATP using energy harvested from the cell's nutrients.

bond: (in chemistry) A semi-permanent attachment between atoms - or groups of atoms - in a molecule. It's formed by an attractive force between the participating atoms. Once bonded, the atoms will work as a unit. To separate the component atoms, energy must be supplied to the molecule as heat or some other type of radiation.

Calvin cycle: Named for Melvin Calvin, the man who discovered it, this cycle is the process by which plants and algae turn carbon dioxide into basic carbohydrates.

carbohydrates: Any of a large group of compounds occurring in foods and living tissues, including sugars, starch and cellulose. They contain hydrogen and oxygen in the same ratio as water (2:1) and typically can be broken down in an animal's body to release energy.

carbon dioxide: (or CO ₂) A colorless, odorless gas produced by all animals when the oxygen they inhale reacts with the carbon-rich foods that they've eaten. Carbon dioxide also is released when organic matter burns (including fossil fuels like oil or gas). Carbon dioxide acts as a greenhouse gas, trapping heat in Earth's atmosphere. Plants convert carbon dioxide into oxygen during photosynthesis, the process they use to make their own food.

cell: The smallest structural and functional unit of an organism. Typically too small to see with the unaided eye, it consists of a watery fluid surrounded by a membrane or wall. Depending on their size, animals are made of anywhere from thousands to trillions of cells. Most organisms, such as yeasts, molds, bacteria and some algae, are composed of only one cell.

cellulose: A type of fiber found in plant cell walls. It is formed by chains of glucose molecules.

chemical: A substance formed from two or more atoms that unite (bond) in a fixed proportion and structure. For example, water is a chemical made when two hydrogen atoms bond to one oxygen atom. Its chemical formula is H ₂ O. Chemical also can be an adjective to describe properties of materials that are the result of various reactions between different compounds.

chemical reaction: A process that involves the rearrangement of the molecules or structure of a substance, as opposed to a change in physical form (as from a solid to a gas).

chlorophyll: Any of several green pigments found in plants that perform photosynthesis - creating sugars (foods) from carbon dioxide and water.

chloroplast: A tiny structure in the cells of green algae and green plants that contain chlorophyll and creates glucose through photosynthesis.

electromagnetic: An adjective referring to light radiation, to magnetism or to both.

excite: (in chemistry and physics) To transfer energy to one or more outer electrons in an atom. They remain in this higher energy state until they shed the extra energy through the emission of some type of radiation, such as light.

fructose: A simple sugar. Along with glucose, fructose makes up half of each molecule of sucrose (also known as table sugar).

glucose: A simple sugar that is an important energy source in living organisms. As an energy source moving through the bloodstream, it is known as "blood sugar." It is half of the molecule that makes up table sugar (also known as sucrose).

glyceraldehyde 3-phosphate or G3P: A molecule created as part of the chemical steps that form simple carbohydrates. Two molecules of G3P are made in plants and algae as part of the Calvin cycle of photosynthesis. Animals and bacteria also create G3P as part of their own steps of making carbohydrate.

hydrogen: The lightest element in the universe. As a gas, it is colorless, odorless and highly flammable. It's an integral part of many fuels, fats and chemicals that make up living tissues. It's made of a single proton (which serves as its nucleus) orbited by a single electron.

mass: A number that shows how much an object resists speeding up and slowing down - basically a measure of how much matter that object is made from.

membrane: A barrier which blocks the passage (or flow through) of some materials depending on their size or other features. Membranes are an integral part of filtration systems. Many serve that same function as the outer covering of cells or organs of a body.

molecule: An electrically neutral group of atoms that represents the smallest possible amount of a chemical compound. Molecules can be made of single types of atoms or of different types. For example, the oxygen in the air is made of two oxygen atoms (O ₂), but water is made of two hydrogen atoms and one oxygen atom (H ₂ O).

NADPH or NADP+: Short for nicotinamide adenine dinucleotide phosphate (but no one calls it that). This molecule is a way for cells to store and transfer energy. When the NADP+ molecule is transformed to NADPH, it contains energy, which it can then use to power other reactions in a cell.

organelle: Specialized structures, such as mitochondria, found within a cell.

oxygen: A gas that makes up about 21 percent of Earth's atmosphere. All animals and many microorganisms need oxygen to fuel their growth (and metabolism).

particle: A minute amount of something.

photon: A particle representing the smallest possible amount of light or other type of electromagnetic radiation.

photosynthesis: (verb: photosynthesize) The process by which green plants and some other organisms use sunlight to produce foods from carbon dioxide and water.

protein: A compound made from one or more long chains of amino acids. Proteins are an essential part of all living organisms. They form the basis of living cells, muscle and tissues; they also do the work inside of cells. Among the better-known, stand-alone proteins are the hemoglobin (in blood) and the antibodies (also in blood) that attempt to fight infections. Medicines frequently work by latching onto proteins.

reduction: (v. reduce) A chemical reaction that adds one or more electrons. It's also viewed as the opposite of oxidation. As rust oxidizes iron, the process reduces those nearby oxygen atoms. That means that they gain electrons, which have a negative charge.

ribulose 1,5-bisphosphate: (RuBP) A molecule that completes the first and last steps of the Calvin cycle, which creates sugar out of carbon dioxide. This molecule contains five carbons and binds to the enzyme rubisco. Rubisco hooks up RuBP with carbon dioxide from the air, the first step in making a carbohydrate.

rubisco: This acronym stands for ribulose bisphosphate carboxylase/oxygenase. It is the most common protein on Earth. In its role as an enzyme, it plays a pivotal role in photosynthesis.

starch: A soft white chemical made by all green plants. It's a relatively long molecule made from linking together a lot of smaller, identical building blocks - all of them glucose, a simple sugar. Plants and animals use glucose as an energy source. Plants store that glucose, in the form of starch, as a reserve supply of energy. Animals that consume starch can break down the starch into glucose molecules to extract the useful energy.

stroma: (in botany) The colorless fluid inside a chloroplast, where the Calvin cycle portion of photosynthesis takes place. (in anatomy) The supportive structure surrounding an organ. It includes the connective tissue that holds the organ in place and the blood vessels that bring the organ oxygen and sugars.

synthesis: (v. synthesize) The production of a substance by the combining of simpler chemical building blocks.

thylakoid membranes: An internal system of connected membranes inside a chloroplast. The membranes contain not only the green pigment chlorophyll, but also proteins. These membranes are where the light reaction portion of photosynthesis takes place, producing oxygen and energy to power the sugar-making portions of photosynthesis.

wavelength: The distance between one peak and the next in a series of waves, or the distance between one trough and the next. It's also one of the "yardsticks" used to measure radiation. Visible light - which, like all electromagnetic radiation, travels in waves - includes wavelengths between about 380 nanometers (violet) and about 740 nanometers (red). Radiation with wavelengths shorter than visible light includes gamma rays, X-rays and ultraviolet light. Longer-wavelength radiation includes infrared light, microwaves and radio waves.

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Plants can take in light, water and carbon dioxide, and send out sugar and oxygen. Here's how it works.

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2nd LOI-Importance of Science in our Daily Life -Research topics and liknks 

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2nd LOI-Importance of Science in our Daily Life -Research topics and liknks 

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What are the recent developments in science?

Science in our daily life

How Important is Science

https://www.vedantu.com/chemistry/importance-of-science

https://undsci.berkeley.edu/article/whathassciencedone_01

Find Reading Passages (readworks.org)

How do we use science in everyday life? | My Essay Point

Science for Society (unesco.org)

https://infinitylearn.com/surge/chemistry/importance-of-science/

https://www.bayer.com/en/news-stories/every-day-is-science-day-stem-experiments-kids

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Raz Plus text on Pros and Cons of Science/Energy Sources 

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Raz Plus text on Pros and Cons of Science/Energy Sources 

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https://www.timeforkids.com/g56/topics/inventions/

https://www.timeforkids.com/g56/best-inventions-2023-g5/

https://www.pitara.com/science-for-kids/science-news-for-kids/#google_vignette

https://www.pbs.org/parents/learn-grow/all-ages/science

https://kids.nationalgeographic.com/magazine/article/cool-inventions

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Research links -Different Perspectives on application of Scientific Laws 

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Research links -Different Perspectives on application of Scientific Laws 

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Research on one of the following links to share your perspectives on the application of scientific laws-

SPACE JUNK:

https://www.natgeokids.com/nz/discover/science/space/space-junk-strange-things-in-space/

https://letstalkscience.ca/educational-resources/stem-in-context/space-junk

REACHING MARS:

https://www.bbcearth.com/news/will-we-ever-set-foot-on-mars

https://kids.kiddle.co/Exploration_of_Mars

https://kids.nationalgeographic.com/space/article/mission-to-mars

NUCLEAR ENERGY:

https://www.ducksters.com/science/physics/nuclear_energy_and_fission.php

https://www.nationalgeographic.com/environment/energy/reference/nuclear-energy/

DEFORESTATION (PHOTOSYNTHESIS)

https://sciencing.com/disadvantages-deforestation-8153.html

HYDRO-POWER

https://kidsdiscover.com/teacherresources/whats-good-and-whats-bad-about-hydropower/

https://www.ducksters.com/science/environment/hydropower.php

MEDICAL BREAKTHROUGH:

https://www.worldwidecancerresearch.org/news-opinion/2021/april/7-incredible-medical-breakthroughs-that-changed-the-world/

https://www.sbigeneral.in/blog-details/role-of-science-in-healthcare

UNDERWATER HOTELS:

https://www.bbc.com/news/business-25184175

https://www.bigrentz.com/blog/underwater-construction

Can We Build Cities Under Water? - YouTube