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whatch this amazing vid!!

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Science Max | Friction | Season 1 Full Episode

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Light and Shadows
A shadow is made when an object blocks light. The object must be opaque or translucent to make a shadow, a transparent object will not make any shadow, because light will pass straight through it.

http://kinooze.com/what-is-a-shadow/

http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/shadows/read/1/

http://factoflife.net/science/7-interesting-facts-about-light-and-shadow-for-kids.html
https://www.youtube.com/watch?v=5Dc2-D0vbZI

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Friction is essential for life. Imagine a world with no friction...
We would not be able to do nothing except SLIDE!!
!

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friction creates static electricity. When the surfaces creates more friction there is more static  electricity!

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this is a fun little game to help you with friction. HAVE FUN!

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A great way to build the foundation skills that today's elementary school curriculum requires. These learning games and songs are fun, teach important skills for preschool and elementary school kids and they're free. Want educational games that help build skills? You've come to the right place!

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here is a video to help you on friction!

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What is Friction in Physics? - Science for Kids | Educational Videos by Mocomi

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Chosen by Marta Alex andr Arch

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Listen...what do you hear? Chances are you will hear the sound of something. It could be the hum of an appliance, people speaking or even a clock ticking. Sound is all around us. But what do we really know about sound? Read on to discover what sound is and other resounding facts.

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Alex,Marta,Archie

Sound is made when something moves or vibrates. The movement sets up a sound wave in the surrounding air. Vibreting  sounds, like  drumming, are made when an object vibrates back and forth.

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What is Sound? | Physics for Kids | SciShow Kids

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Sound vibrations travel better through some materials than others. For example, sound vibrations travel very well along metal pipes.
Sound cannot travel through a completely empty space (a vacuum), which has nothing, not even air, in it. If there is a vacuum between a sound-making object and our ears, we won't be able to hear the sound.

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AIR RESISTANCE

Air resistance is a frictional force air exerts against a moving object. As the object moves, air resistance slows it down. The faster the objects motion, the greater the air resistance exerted against it. The greater the surface area the faster the object will fall! Did you know that a feather will fall more slowly than a metal ball because the feather has a larger surface area than the big metal ball. This is the principal that was used in making a parachute. You can use streamline position!

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BBC Bitesize - KS2 Science - What is air resistance?

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Friction at work in sports like cycling, ice-skating and parachuting.

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Human circulatory system
The Heart and the Circulatory System, can also be named the Cardiovascular System. It makes the network that delivers and transports Blood from the Bloods Vessels to the Blood Tissues. If you hear a Heartbeat that means it is Transporting blood from the Heart into our Bodies carrying Nutrients and Oxygen to our parts of our Bodies.

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What Does the Heart Do?

The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. After delivering the oxygen, the blood returns to the heart. The heart then sends the blood to the lungs to pick up more oxygen. This cycle repeats over and over again.

What Does the Circulatory System Do?

The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart.

The circulatory system carries oxygen, nutrients, and

hormonesto cells, and removes waste products, like carbon dioxide. These roadways travel in one direction only, to keep things going where they should.

What Are the Parts of the Heart?

The heart has four chambers - two on top and two on bottom:

The two bottom chambers are the right ventricle and the left ventricle. These pump blood out of the heart. A wall called the interventricular septum is between the two ventricles.

The two top chambers are the right atrium and the left atrium. They receive the blood entering the heart. A wall called the interatrial septum is between the atria.

The atria are separated from the ventricles by the atrioventricular valves:

The tricuspid valve separates the right atrium from the right ventricle.

The mitral valve separates the left atrium from the left ventricle.

Two valves also separate the ventricles from the large blood vessels that carry blood leaving the heart:

The pulmonic valve is between the right ventricle and the pulmonary artery, which carries blood to the lungs.

The aortic valve is between the left ventricle and the aorta, which carries blood to the body.

What Are the Parts of the Circulatory System?

Two pathways come from the heart:

The pulmonary circulation is a short loop from the heart to the lungs and back again.

The systemic circulation carries blood from the heart to all the other parts of the body and back again.

In pulmonary circulation:

The pulmonary artery is a big artery that comes from the heart. It splits into two main branches, and brings blood from the heart to the lungs. At the lungs, the blood picks up oxygen and drops off carbon dioxide. The blood then returns to the heart through the pulmonary veins.

In systemic circulation:

Next, blood that returns to the heart has picked up lots of oxygen from the lungs. So it can now go out to the body. The aorta is a big artery that leaves the heart carrying this oxygenated blood. Branches off of the aorta send blood to the muscles of the heart itself, as well as all other parts of the body. Like a tree, the branches gets smaller and smaller as they get farther from the aorta.

At each body part, a network of tiny blood vessels called capillaries connects the very small artery branches to very small veins. The capillaries have very thin walls, and through them, nutrients and oxygen are delivered to the cells. Waste products are brought into the capillaries.

Capillaries then lead into small veins. Small veins lead to larger and larger veins as the blood approaches the heart. Valves in the veins keep blood flowing in the correct direction. Two large veins that lead into the heart are the superior vena cava and inferior vena cava. (The terms superior and inferior don't mean that one vein is better than the other, but that they're located above and below the heart.)

Once the blood is back in the heart, it needs to re-enter the pulmonary circulation and go back to the lungs to drop off the carbon dioxide and pick up more oxygen.

How Does the Heart Beat?

The heart gets messages from the body that tell it when to pump more or less blood depending on a person's needs. For example, when you're sleeping, it pumps just enough to provide for the lower amounts of oxygen needed by your body at rest. But when you're exercising, the heart pumps faster so that your muscles get more oxygen and can work harder.

How the heart beats is controlled by a system of electrical signals in the heart. The sinus (or sinoatrial) node is a small area of tissue in the wall of the right atrium. It sends out an electrical signal to start the contracting (pumping) of the heart muscle. This node is called the pacemaker of the heart because it sets the rate of the heartbeat and causes the rest of the heart to contract in its rhythm.

These electrical impulses make the atria contract first. Then the impulses travel down to the atrioventricular (or AV) node, which acts as a kind of relay station. From here, the electrical signal travels through the right and left ventricles, making them contract.

One complete heartbeat is made up of two phases:

1. The first phase is called systole (pronounced: SISS-tuh-lee). This is when the ventricles contract and pump blood into the aorta and pulmonary artery. During systole, the atrioventricular valves close, creating the first sound (the lub) of a heartbeat. When the atrioventricular valves close, it keeps the blood from going back up into the atria. During this time, the aortic and pulmonary valves are open to allow blood into the aorta and pulmonary artery. When the ventricles finish contracting, the aortic and pulmonary valves close to prevent blood from flowing back into the ventricles. These valves closing is what creates the second sound (the dub) of a heartbeat.

2. The second phase is called diastole (pronounced: die-AS-tuh-lee). This is when the atrioventricular valves open and the ventricles relax. This allows the ventricles to fill with blood from the atria, and get ready for the next heartbeat.

How Can I Help Keep My Heart Healthy?

To help keep your heart healthy:

Get plenty of exercise.

Eat a nutritious diet.

Reach and keep a healthy weight.

If you smoke, quit.

Go for regular medical checkups.

Tell the doctor about any family history of heart problems.

Let the doctor know if you have any chest pain, trouble breathing, or dizzy or fainting spells; or if you feel like your heart sometimes goes really fast or skips a beat.

Date reviewed: September 2023

More on this topic
For Teens

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Heart and Circulatory System (for Teens)

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The heart and circulatory system (also called the cardiovascular system) make up the network that delivers blood to the body's tissues.

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life cycle of a plant
*seed
*seedling
*young adult plant
* adult plan
once the the plant is an adult it will soon die and decompost

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A life cycle shows how a living thing grows and changes. While plants life cycles keep going, a plant's life begins with the seed. With water, right temperature and right location, the seed grows. It becomes a seedling. Roots push down into the ground to get water and minerals.

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friction is when something is rubbing against a different object which equals energy read for more info below!

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Friction
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult.
Friction always works in the direction opposite to the direction in which the object is moving, or trying to move. Friction always slows a moving object down.

The amount of friction depends on the materials from which the two surfaces are made. The rougher the surface, the more friction is produced. Friction also produces heat. If you rub your hands together quickly, you will feel them get warmer.

Friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding.

Sometimes we want to reduce friction. For example, we use oil to reduce the friction between the moving parts inside a car engine. The oil holds the surfaces apart and can flow between them. The reduced friction means there is less wear on the car's moving parts and less heat produced.

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Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move.

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The life cycle d

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KS2 Science Plants learning resources for adults, children, parents and teachers.

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1. Life-cycle of a plant /
2. Friction /
3. Air Resistance /
4. Human Circulatory system /
5. Light & Shadows /
6. Sound /