Defining Gravity
A push or pull acting on an object is called a
force
The natural pull of objects toward the ground is called
gravity
The path that an object spins around another object is called
an orbit
The friction between the air and a moving object is called
air resistance
Mass is the amount of ______ an object has
matter
Which English scientist was the first person to study gravity?
Isaac Newton
To move more massive objects against the pull of gravity, it will need more _______
force
What is Earth's only natural satellite?
the Moon
A group of stars, gas and dust bound together by gravity is called
a galaxy
What is the name of our galaxy?
The Milky Way
Gravity is the force of attraction between...
any two objects
The farther away something is from the Earth, the gravitational pull will...
decrease
Human made objects that orbit the Earth are called
artificial satellites
An area in which there is no air or gas is called
a vacuum
How were the huge craters on the Moon formed?
asteroids hitting it
When we talk about gravity, 'up' just means moving _____ from the Earth
away
The heaviness of an object, caused by the pull of gravity, is called
weight
What is the name of the large artificial satellite orbiting our planet?
the International Space Station
Data that supports or argues a scientific idea is called
evidence
Shooting stars are pieces of rock that have broken off from a passing ______ or ______
comet or asteroid
What event led to the "Aha!" moment of discovering gravity?
A falling apple hitting Scientist Issac Newton in the head
The object that has a gravitational pull stronger than absolutely anything is a
black hole
How long does it take for the Moon to orbit the Earth?
27 days
The speed needed to break the force of Earth's gravity is called
escape velocity
How many people have actually been on the moon?
12