Who first suggested about gravity?
Isaac Newton
A force that pulls objects toward each other is called __________.
Gravity
Gravity is a force that _________.
attracts
Earth's gravity pulls in one direction-________.
down
Isaac Newton was a scientist who Iived more than ______ years ago.
300
_______ is defined as how much matter something has.
Mass
Something that takes up space and has weight is called_______.
matter
The size of the force of gravity depends on the _________ of an object.
mass
Everything has gravity, which means everything _______ on everything else.
pulls
Astronauts traveling in space are________ because there is no gravity pulling on them.
weightless
To a scientist, mass and weight are not the ______ thing.
same
Your weight is a measure of the ________of gravity.
force or pull
A person weighs _______ on Mars than on Earth.
less
If you visited other worlds, your weight would be different but your ______ is the same.
mass
