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Water can occur in three states: solid (ice), liquid, or gas (vapor).

Solid water—ice is frozen water. When water freezes, its molecules move farther apart, making ice less dense than water. This means that ice will be lighter than the same volume of water, and so ice will float in water. Water freezes at 0° Celsius, 32° Fahrenheit.

Liquid water is wet and fluid. This is the form of water with which we are most familiar. We use liquid water in many ways, including washing and drinking.

Water as a gas—vapor is always present in the air around us. You cannot see it. When you boil water, the water changes from a liquid to a gas or water vapor. As some of the water vapor cools, we see it as a small cloud called steam. This cloud of steam is a miniversion of the clouds we see in the sky. At sea level, steam is formed at 100° Celsius, 212° Fahrenheit.

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Make an Observation. Scientists are naturally curious about the world. ...

Form a Question. After making an interesting observation, a scientific mind itches to find out more about it. ...

Form a Hypothesis. ...

Conduct an Experiment. ...

Analyse the Data and Draw a Conclusion.

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The cell is the basic structural, functional, and biological unit of all known living organisms. A cell is the smallest unit of life that can replicate independently, and cells are often called the "building blocks of life". The study of cells is called cell biology.

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The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s.

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There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is chemical reaction, a new substance is formed and energy is either given off or absorbed.

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Variation in the number of electrons or neutrons does not change the type of element. Changing number of electrons produces ions while changing the number of neutrons produces isotopes. The modern periodic table is organized in order of increasing atomic number. The element's atomic mass in atomic mass units

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Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).

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In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction.

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Animalia, Plantae, Fungi, Protista and Monera

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a biological community of interacting organisms and their physical environment.

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the envelope of gases surrounding the earth or another planet.

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Means the quality of being hot; high temperature.

Heat transfer, also referred to simply as heat, is the movement of thermal energy from one thing to another thing of different temperature. ... There are three different ways the heat can transfer: conduction (through direct contact), convection (through fluid movement), or radiation (through electromagnetic waves).

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wear away or change the appearance or texture of (something) by long exposure to the air.

Means the process of eroding or being eroded by wind, water, or other natural agents.

Means the process in which sediments, soil and rocks are added to a land form or land mass. Wind, ice, and water, as well as sediment flowing via gravity, transport previously eroded sediment, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.

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Is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

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The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals.

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There are four main stages in the water cycle. They are evaporation, condensation, precipitation and collection. Let's look at each of these stages.

Evaporation: This is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). Water vapour droplets join together to make clouds!

Condensation: This is when water vapour in the air cools down and turns back into liquid water.

Precipitation: This is when water (in the form of rain, snow, hail or sleet) falls from clouds in the sky.

Collection: This is when water that falls from the clouds as rain, snow, hail or sleet, collects in the oceans, rivers, lakes, streams. Most will infiltrate (soak into) the ground and will collect as underground water.

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T he cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.

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All matter can be classified into two categories: pure substances and mixtures. A pure substance consists of a single element or compound. Iron is formed only of iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules. A mixture, however, is made up of different compounds and/or elements

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The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons), electron configurations, and recurring chemical properties.

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the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either Eukaryota or prokaryotic.

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The types of atoms that there are, are protons, neutrons, and electrons. there is also the electron cloud and the nucleus

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Primary succession occurs in essentially lifeless areas—regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. Secondary succession occurs in areas where a community that previously existed has been removed; it is typified by smaller-scale disturbances that do not eliminate all life and nutrients from the environment.

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In the food web or chain there are producers, consumers, and decomposers. Producers include green plants; consumers are animals that eat primary producers; decomposers are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals

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There are 4 parts for an experiment, independent variable, control group, dependent variable, and experiment group.

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Inference means a conclusion reached on the basis of evidence and reasoning.

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Observation means the action or process of observing something or someone carefully or in order to gain information.