www.makemegenius.com Free Science Videos for Kids Gravity What is gravity? www.makemegenius.com Free Science Videos for Kids

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www.makemegenius.com Free Science Videos for Kids Gravity Gravity is a force between ALL objects! Gravity www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids GRAVITY DEFINED Gravity is the tendency of objects with mass to accelerate towards each other Gravity is one of the four fundamental forces in nature. www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids THE HISTORY OF GRAVITY Sir Isaac Newton wrote the Law of Gravitation in 1687 www.makemegenius.com Free Science Videos for Kids

UNIVERSAL LAW OF GRAVITATION There is an apple on my head Gravity is greater when mass is larger and distance is shorter. www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids Law of Gravity The size of the force depends on the mass of the objects. The bigger they are, the bigger the force! Small attractive force Bigger attractive force www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids Law of Gravity The size of the force also depends on the distance between the objects. More Less www.makemegenius.com Free Science Videos for Kids

Gravity and our Solar System The Sun’s gravity is what holds our solar system together. Since Jupiter is the largest planet, it has the most gravity. Pluto has the least amount of gravity. www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids Gravity The force of gravity on something is called its weight. Because it is a force it is measured in Newtons. Weight www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids Mass Mass is a measure of the amount of material an object is made of. It is measured in kilograms. www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids Mass and weight Mass is a measure of the amount of material an object is made of. It is measured in kilograms. Weight is the force of gravity on an object. It is measured in Newtons. www.makemegenius.com Free Science Videos for Kids

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Mass and Weight are two different Properties of Matter Mass is a physical property of matter that explains how much matter is in an object Mass does not change when gravity changes WEIGHT Weight is a force which is calculated by multiplying the acceleration of gravity times mass. Weight can change when gravity changes www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids Easy isn’t it? www.makemegenius.com Free Science Videos for Kids

www.makemegenius.com Free Science Videos for Kids

Dropping a ball If you drop a tennis ball and a football from the same height at the same time they would hit the ground at the same time. All objects fall to earth at the same rate regardless of their mass.

Dropping stuff However if you dropped a bowling ball and a feather they would not land at the same time. Why? Air resistance acts as an opposing force and slows objects down.

What we often refer to as weight is actually mass. Our mass is measured in kilograms (but sometimes still in stones and pounds).

If your mass is 60kg, it stays the same wherever you are. Your weight may change according to how strong the gravity is where you are.

Gravity makes objects accelerate (go faster as they fall).

Gravity The Earth’s gravity pulls objects towards the centre of the earth. The force of the Earth’s gravity on you is called your weight. Weight is measured in Newtons. What we often refer to as weight is actually mass. Our mass is measured in kilograms (but sometimes still in stones and pounds). Gravity makes objects accelerate (go faster as they fall).

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