Gravity
What does it mean when we say gravity "pulls objects down to Earth"?
Gravity pulls objects toward the center of Earth.
Jenny is jumping up in the air. What happens at the highest point of her jump?
Gravity starts to pull her back down.
Which activity is made easier by the force of gravity?
riding a bike downhill
When will gravity be the strongest?
the closer you are to an object
What is gravity?
the force of attraction between objects with mass
Which of the following has the strongest gravitational pull?
the sun
Why do satellites launched from Earth need to reach a certain speed to reach outer space?
to overcome Earth's gravitational force
Gravity on Earth pulls all things __________.
toward the center of Earth
What do we call the force of gravity on an object?
weight
In which case is gravity the main force acting to move an object?
when an orange falls from a tree
How are gravity and distance related?
As distance increases, gravity decreases.
As distance increases, gravity decreases.
As mass increases, gravity increases.
What natural phenomenon occurs on Earth due to the gravitational force of the moon?
ocean tides
Imagine there was no gravity. Which is NOT true?
People would feel so heavy it would be hard to stand up.
What scientist is credited with first describing the mathematics of gravity?
Sir Isaac Newton
Which of the following is true of Earth's gravity?
It pulls objects toward Earth's surface without touching them.
Which of the following is true of every force?
It pushes or pulls on an object.
Jupiter has more mass than any other planet in our solar system. Mercury has less mass than any other planet. Which planet has the most gravity?
Jupiter
A yo-yo falls more slowly on Mercury than on Earth. What does this show?
Mercury has less gravity than Earth.
An astronaut will feel less gravitational pull on the moon than on Earth. Therefore __________.
an astronaut can jump much further on the moon than on Earth
Why is the force of gravity weaker on the moon than on Earth?
because the moon has less mass than Earth
Why does the sun exert a stronger gravitational pull on Earth than the moon does?
because the sun has more mass than any object in the solar system
Jeannie put her soccer ball on the ground on the side of a hill. What force acted on the soccer ball to make it roll down the hill?
gravity
What is the force that pulls the parachute down toward Earth?
gravity
How much gravity an object has depends on its __________.
mass
