EFF: Inv.5 and 6

True or False: Mass is the amount of matter than makes up a substance. Weight is the force of gravity on the object.

• True 
• False 

The mass of an object determines its gravitational force.

• True
• False

Gravity is the force that pulls all objects toward Earth.

• True
• False

Which of the following was NOT a component in the model addressed in the video?

• Tennis ball = globe 
• Rubber band = force of gravity 
• Finger = a penguin on Earth
• Clouds = Changing the wind 

Which best describes why a penguin won't fall off the earth? 

• The force of gravity pulls the penguin toward Earth’s center at all times.
• The force of gravity pulls the penguin toward Earth’s center once and a while. 
• The force of gravity pulls the penguin around Earth’s center at all times.

True or False: The gravitational force between two objects is never equal and opposite but since Earth’s mass is much smaller, it is accelerating toward the Sun and into orbit.

• True
• False 

According to the model, what variable determines the effect that one object’s gravity will have on other objects?

• Weight
• Height
• Mass
• strength 

What happened when you dropped the pencil and paper? 

• When the pencil and the piece of paper were dropped at the same time, they hit the ground at different times
• When the pencil and the piece of paper were dropped at the same time, they hit the ground at the same times
• When the pencil and the piece of paper were dropped at the same time, they never hit the ground. 

True or False? When the ping pong ball and the tennis ball were dropped at the same time, they hit the ground at the same time.

• True
• False

What patterns do you notice about the mass of the marbles and the weight of the marbles? 

• The mass increases by about 20 grams every time you add a marble. The weight increases by about 0.2N every time you add a marble.
• The mass increases by about 100 grams every time you add a marble. The weight increases by about 2N every time you add a marble.
• The mass decreased by about 20 grams every time you add a marble. The weight increases by about 0.2N every time you add a marble.
• The mass decreased by about 100 grams every time you add a marble. The weight increases by about 0.2N every time you add a marble.