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 celestial bodies that orbit the sun are called...
planets
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
A scientist who studies stars, planets, galaxies, and other objects in space
Astronomer
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/mass
What is the name of the large artificial satellite orbiting our planet?
the International Space Station
The study of how the positions of stars and planets are believed to influence human affairs and personalities
Astrology
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
Planet B has twice the mass of planet B, but their diameters are the same. Which planet has a stronger gravitational pull? Explain.
Planet B because it has more mass than A.
How long does it take for the Moon to orbit the Earth?
29.5 days
The invisible force that pulls objects toward each other
Gravitational Force
How many people have actually been on the moon?
12