When you roll a tennis ball on the floor, what forces causes it to stop?
Friction between the ball and the floor.
100
What types of words describe motion?
Speed, direction, and motion.
100
Can you make a longer chain of magnetic marbles on earth one in space? Why?
Space because there is no gravity to cause the chain of marbles to break when adding them.
100
When you are performing an investigation, how many times should you repeat it?
You should repeat it at least 3 times.
200
What is a simple machine?
It makes work easier by applying a force to move a load.
Examples include a screw, wedge, lever, pulley, wheel and axle, incline plane.
200
Aria and Jenna discovered that a marble traveled a greater distance when Aria pushed it across the floor. Why did the marble travel a greater distance when Aria pushed it?
Aria applied a greater force (push) to the marble.
200
What force was needed to start the jumping frogs moving?
A push.
200
What force helped your spinner to move?
Gravity
200
Daniel and KeMille ran a race. They ran 20 meters. Daniel crossed the finish line in 22 seconds. KeMille crossed the finish line in 24 seconds. Why did Daniel win the race?
He ran 20 meters in less time than KeMille.
300
Name a simple machine and give an example of one
.answers will vary.
300
Friction is a force caused by -----------.
Rubbing together of two surfaces.
300
When a car moves around a corner, does it:
A. Speed up
B. Stop
C. Change direction
D. Lose gravity
C. Change direction
300
Which two forces were responsible for the spinning motion of your spinner toy?
Gravity and friction.
300
How does friction impact motion?
It can slow things down when the surfaces rub together.
It can help things to stay put she necessary. Without friction, things would slide everywhere.
400
Complete the sentence.
An object at rest................
...stays at rest unless acted upon by an outside force.
400
When you throw a paper airplane, what force makes it land on the floor?
Gravity
400
To know how fast a marble travels, you need to know how far it traveled and the amount of time it took.
True or false.
True
400
What will happen to a paper airplane when it is tossed in space?
It will keep going in the same direction until a force stops it.
400
List some words to describe the motion of the jumping frogs.
When you place a tennis ball on a table it does not move. Which two forces are responsible for the tennis ball staying in one place.
Gravity is pulling down on the ball while the table is pushing up with equal force.
500
If two people ran a race and one of them won, what are the reasons for them winning?
They ran the same distance but one person ran faster in less time.
500
What challenge did the astronauts have when trying to use Rat Stuff in space?
Without gravity to hold him in place, it was hard to have a surface for Rat Stuff to push off from.
500
When you and a friend are playing with marbles, you notice that it is more difficult to move the larger marble than the smaller marble. Why is this true?
A greater force is needed to move the marble with more mass or weight.