Science - Chapter 7 - Test 1/30/14 Flashcards Preview

CMS - 6th Grade - PRIOR NOTECARDS > Science - Chapter 7 - Test 1/30/14 > Flashcards

Flashcards in Science - Chapter 7 - Test 1/30/14 Deck (41)
1

The combination of all forces is called the ______.

The combination of all forces is called the net force.

2

In an unbalanced force all forces acting on an object are not _______.

In an unbalanced force all forces acting on an object are not equal.

3

A _______ is a push or pull.

A force is a push or pull.

4

the strength of a force is measure in the SI unit called the ________.

the strength of a force is measure in the SI unit called the newton (N).

5

What are the 2 types of forces?

1. balanced

2. unbalanced

6

The Newton was named after the scientist ________.

The Newton was named after the scientist Isaac Newton.

7

Motion does not occur when there is a ______ force.

Motion does not occur when there is a balanced force.

8

In a balanced force, all forces acting on an object are ______ and cancel each other out.

In a balanced force, all forces acting on an object are equal and cancel each other out.

9

Motion occurs when there is an _______ force.

Motion occurs when there is an unbalanced force.

10

A _______ is described by its strength and by the direction which it acts.

A force is described by its strength and by the direction which it acts.

11

Name the 4 types of friction.

1. rolling

2. liquid

3. sliding

4. static

12

_________ is the force that pulls objects toward each other.

Gravity is the force that pulls objects toward each other.

13

The force that two surfaces exert on each other when they rub together with each other is called _______.

The force that two surfaces exert on each other when they rub together with each other is called friction.

14

Gravitational force depends on the ________ between objects.

Gravitational force depends on the distance between objects.

15

Name the two factors that affect the force of friction.

1. types of surfaces

2. how hard the surfaces are rubbed together

16

Friction acts in a direction _______ to the direction of the object's motion

Friction acts in a direction opposite to the direction of the object's motion

17

_______ friction occurs between objects that aren't moving.

Static friction occurs between objects that aren't moving.

18

The law of _________ states that the force of gravity acts between all objects in the universe that have mass.

The law of Universal Gravity states that the force of gravity acts between all objects in the universe that have mass.

19

What is an example of fluid friction?

a fish swimming in water

20

The more mass an object has, the greater its _________ force.

The more mass an object has, the greater its gravitational force.

21

Name the two factors that affect the gravitational attraction between objects.

1. mass

2. distance

22

________ friction occurs when a solid object moves through a fluid.

Fluid friction occurs when a solid object moves through a fluid.

23

______ friction occurs when 2 solid objects slide over each other.

Sliding friction occurs when 2 solid objects slide over each other.

24

Gravity is a force that pulls objects _______ down toward the center of Earth.

Gravity is a force that pulls objects straight down toward the center of Earth.

25

________ friction occurs when an object rolls across a surface.

Rolling friction occurs when an object rolls across a surface.

26

Newton's 1st law of motion states that rest will remain at rest unless acted upon by a nonzero ________.

Newton's 1st law of motion states that rest will remain at rest unless acted upon by a nonzero net force.

27

Newton's 2nd law states that an object's _______ depends on its mass and on the net force action on it.

Newton's 2nd law states that an object's acceleration depends on its mass and on the net force action on it.

28

Newton's 3rd law states that if one object exerts a _______ on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

Newton's 3rd law states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

29

Resistance to change in ______ is called inertia.

Resistance to change in motion is called inertia.

30

If an object is not moving, it will not start moving unless a _______ acts on it.

If an object is not moving, it will not start moving unless a force acts on it.

31

Newton's 1st law of motion is also called the __________.

Newton's 1st law of motion is also called the law of inertia.

32

Inertia depends on _______.

Inertia depends on mass.

33

The greater the mass of an object, the greater the _______.

The greater the mass of an object, the greater the inertia.

34

If an object is moving, it will continue to move unless a force acts on it to change its ___________.

If an object is moving, it will continue to move unless a force acts on it to change its speed or direction.

35

What formula can we use to find the force of an object?

force = mass x acceleration

36

For every action, there is an _________.

For every action, there is an equal but opposite reaction.

37

When a car you are in stops suddenly, you move ________ because of inertia.

When a car you are in stops suddenly, you move forward because of inertia.

38

When you walk you push ________ on the ground with your feet, the Earth pushes up on your feet with the same force.

When you walk you push backward on the ground with your feet, the Earth pushes up on your feet with the same force.

39

What law makes this happen: When you walk you push backward on the ground with your feet, the Earth pushes up on your feet with the same force.

Newton's 3rd law

40

What object would accelerate faster, an empty or full shopping cart?

empty shopping cart

41

If a car is going 70 mph, how fast is the person in the car going?

70 mph

Decks in CMS - 6th Grade - PRIOR NOTECARDS Class (56):