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Jordyn > Unit 8 Science Test > Flashcards

Unit 8 Science Test Flashcards

1
Q

The force that keeps planets in orbit around the Sun is

A

Gravity

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2
Q

The force that works against both pushing and pulling forces is

A

Friction

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3
Q

_______ forces cause no motion or change of direction

A

Balanced

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4
Q

Using force to move or change the position or motion of an object

A

Work

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5
Q

Describes a machine with NO or FEW moving parts that make work easier

A

Simple

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6
Q

The force between one object moving or RUBBING against another object

A

Friction

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7
Q

The force between any two objects that have mass

A

Gravity

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8
Q

A push or a pull

A

Force

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9
Q

The amount of stuff inside an object

A

Mass

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10
Q

The time it takes for an object to go
a certain distance is

A

Speed

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11
Q

______ forces cause motion or change of direction

A

Unbalanced

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12
Q

A simple machine used to split things apart is a

A

Wedge

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13
Q

A simple machine often used to hold materials together is a

A

Screw

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14
Q

Repeating investigations helps scientists to see if there are any

A

Mistakes

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15
Q

Hattie travels to the planet Saturn. Saturn has a mass that is more than Earth’s. Will Hattie weigh more or less on Saturn than on Earth?

A. More
B. Less

A

A. More

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16
Q

Hi

A

B. More

17
Q

What do the girl and the chair in this picture show?

the picture is of a girl leaning back in a chair and falling

A. Distance and speed
B. Muscular force
c. unbalanced forces
D. balanced forces

A

C. Unbalanced forces

18
Q

What causes an object to change position?

A. It moves because of balanced forces

B. It moves because of unbalanced forces

C. It moves because of distance

D. It moves because of speed

A

B. It moves because of unbalanced forces

19
Q

How did Isaac Newton make sure his ideas about gravity and forces were true and there were not any mistakes?

A. He did his experiments only one time

B. He did his experiments quickly

C. He repeated his experiments

D. He wrote down his results

A

C. He repeated his experiments

20
Q

What would happen if there were no balanced forces?

A. We would not be able to measure speed.

B. Objects would always be moving.

c. Objects would never move

D. We would not be able to measure position

A

B. Objects would always be moving.

21
Q

If Bob pushes the box with less force than Bill, what will happen to the box?

A. It will not move

B. It will break

C. It will move to the left (toward Bob)

D. It will move to the right (toward Bill)

A

C. It will move to the left (toward Bob)

22
Q

John finishes a race after Ryan. which of these is true?

A. John had greater force than Ryan

B. John had greater speed than Ryan.

C. Ryan had greater speed than John

A

C. Ryan had greater speed than John

23
Q

Which of these is an example of work being done?

A. A man hits a baseball with a bat and the direction of the baseball changes.

B. A girl pushes hard against a couch, but the door stays closed.

C. A cat leans against a door, but the door stays closed.

D. All of these

A

A. A man hits a baseball with a bat and the direction of the baseball changes.

24
Q

How do simple machines make work easier?

A. They make it so less force is needed to move an object.

B. They do work without needing any force.

C. They change the direction of the force

D. both A and C

A

D. both A and C

25
Q

How does an inclined plane make work easier?

A. It changes the direction of the force.

B. It increases the force in a rod.

C. It increases the distance an object moves

D. All of these

A

C. It increases the distance an object moves

26
Q

Which of these is true of the apple on the head?

A. The forces are unbalanced

B. The forces are balanced

C. The apple will move to the right.

D. The apple will move to the left.

A

B. The forces are balanced

27
Q

What would cause the apple to move toward the ground?

A. The forces would have to be unbalanced

B. The forces would have to remain balanced for a longer period of time.

C. Both of these

A

A. The forces would have to be unbalanced

28
Q

An inclined plane wrapped around a post

A

screw

29
Q

Two inclined planes placed back to back

A

wedge

30
Q

looks like a ramp

A

inclined plane

31
Q

a rope pulled around a wheel and axle

A

pulley

32
Q

made of a bar that pivots at a fixed point

A

lever

33
Q

made of a round shape that rolls and a rod that it turns around

A

wheel and axle

Jordyn (6 decks)

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