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4th Grade Science > Chapter 3, Test 2 > Flashcards

Chapter 3, Test 2 Flashcards

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1
Q

True or False

Unbalanced forces do work.

A

True

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2
Q

True or False

The frame is the base of a building.

A

False (Foundation)

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3
Q

True or False

Opposite poles of a magnet repel.

A

False (attract)

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4
Q

True or False

Sir Isaac Newton discovered the laws of motion.

A

True

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5
Q

True or False

The axle is the part of a lever which holds and balances wait.

A

False (fulcrum)

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6
Q

True or False

Mass, speed, and direction are all part of an objects moving energy.

A

True

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7
Q

True or False

Inertia is a property of matter that makes it resist a change in motion.

A

True

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8
Q

True or False

An electromagnet can generate gravity.

A

False (electromagnetic force)

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9
Q

True or False

An object in motion will stay at rest, unless acted upon by an unbalanced force.

A

False (in motion)

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10
Q

True or False

A machine is a device that makes work easier.

A

True

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11
Q

Give an example of something with more mass than a car.

A

Airplane

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12
Q

Give an example of something with less mass than an elephant.

A

Cat

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13
Q

Why does the moon have less gravity than the Earth?

A

It’s smaller

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14
Q

_____ is the push or a pull on an object to move it.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

force

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15
Q

____ is the most stable shape because of a low center of gravity.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Pyramid

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16
Q

_____ is a property of matter that makes it resist a change in motion.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Inertia

17
Q

____ acts like a giant electromagnet.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Earth

18
Q

_____ is the movement resulting from force.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Work

19
Q

_____ increases with a rough surface.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Friction

20
Q

_____ are two objects bumping into each other.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Collision

21
Q

____ has a magnetic field because of its polarity.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Magnet

22
Q

____ is the amount of matter in an object has.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Mass

23
Q

_____ is a type of inclined plane.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

screw

24
Q

_____ is a machine that can help overcome friction.

collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work

A

Wheel and axle

25
Q

A _____ has more inertia in a dog.

any
horse
kitten

A

horse

26
Q

A ____ is a machine designed to overcome wait and make lifting easier.

pulley
wave
wheel and axle

A

pulley

27
Q

Sound community sample of _____ energy in a collision.

converted
moving
transferred

A

Converted

28
Q

A ____ gives a building a shape.

frame
foundation
fulcrum

A

frame

29
Q

Energy transfers in a collision can cause the ____ of objects to change.

mass
speed
weight

A

speed

30
Q

Wax can be used as a ______ to minimize friction.

lodestone
lubricant
machine

A

lubricant

31
Q

Balanced Forces or Unbalanced Forces

Prevent work from being done

A

Balanced forces

32
Q

Balanced Forces or Unbalanced Forces

allow work to be done

A

Unbalanced Forces

33
Q

Balanced Forces or Unbalanced Forces

a chair resting on the floor

A

Balanced forces

34
Q

Balanced Forces or Unbalanced Forces

a person pushing a lawnmower

A

Unbalanced forces

4th Grade Science (19 decks)

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