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Science 6 Q3

Total questions: 190

Worksheet time: 2hrs 35mins

Name
Class
Date
1.

What energy is present in a moving object?

a)

Chemical energy

b)

Kinetic energy

c)

Nuclear energy

d)

Potential energy

2.

When does energy transformation occur?

Energy transformation occurs when

a)

Energy moves from one place to another

b)

Energy changes from one form to another

c)

When energy is created or destroyed

d)

When energy remains the same

3.

How does energy transformation occur in a ceiling fan?

a)

From electrical to mechanical energy

b)

From electrical to chemical energy

c)

From mechanical to electrical energy

d)

From mechanical to thermal

4.

Explain how energy transformation occur in a green plan on a sunny day.

When

a)

Light energy transforms into mechanical energy

b)

Chemical energy transforms into mechanical energy

c)

Light energy transforms into chemical energy

d)

Chemical energy transforms into light energy

5.

How does energy transformation occurs when your rub your hands together?

a)

From mechanical to heat

b)

From mechanical to chemical

c)

From heat to light

d)

From heat to mechanical

6.

What is friction?

a)

Force

b)

matter

c)

Substance

7.

What reduces friction?

a)

making the surface cool

b)

making the surface rough

c)

making the surface smooth

8.

Which of the following shows kinetic friction?

a)

washing machine pushed along a floor

b)

papers on a table top

c)

towel hanging on a rack.

9.

How can you increase friction?

a)

by using oil or another lubricant

b)

by making the surface rougher

c)

asking a friend to help push or pull.

10.

Ian is playing with a toy sledge. In which surface will it travel fastest?

a)

the carpet

b)

the rough floor

c)

the polished floor

11.

Which of the following is an example of increasing friction?

a)

scrubbing the floor

b)

applying oil on door hinges

c)

spreading gravel on the road

12.

A pingpong ball and a flat sheet of paper are dropped at the same time from the same height. What will occur if there is no air resistance?

a)

The pingpong ball will land first.

b)

The pingpong ball will float slowly through the air

c)

The pingpong ball and the flat sheet of paper will land at the same time.

13.

What lubricant can you use to reduce the friction on the floor?

a)

lotion

b)

floorwax

c)

cooking oil

14.

What is gravity?

a)

It is the force that holds the Earth together

b)

It is one of the four physical forces found in nature

c)

all of the above

15.

Which is the best example of gravity?

a)

A person drops a ball, and it falls to the ground

b)

A breeze blows, and a sailboat moves

c)

A car hits a tree, and its motion stops

16.

What causes the falling objects to fall?

a)

acceleration

b)

gravity

c)

speed

17.

Why do you move faster when running down a hill?

a)

Gravity pulls you down

b)

Gravity pulls you up

c)

None of the above

18.

What happens when you go against gravity?

a)

More force is needed to accelerate.

b)

Less force is needed to accelerate.

c)

No force is needed to accelerate,

19.

The ability to do work is called ____________.

a)

Energy

b)

Force

c)

Matter

20.

Which of the following is NOT true about energy?

a)

Energy makes life convenient and comfortable

b)

Life is not possible on Earth without energy from the sun

c)

The only source of energy on Earth is the sun

21.

What is vibration?

a)

how loud a sound is

b)

the back and forth movement of matter

c)

the loudness of softness of a sound

22.

What form of energy is used in sonar for military purposes to detect and determine the location, size and relative motion of underwater objects?

a)

heat energy

b)

sound energy

c)

chemical energy

23.

Which of the following objects make use of sound energy?

a)

fluorescent lamp

b)

electric stove

c)

television

24.

Pattern of disturbance caused by the movement of energy travelling through a medium.

a)

light waves

b)

sound waves

c)

tidal waves

25.

It is a substance through which a vibration does NOT travel?

a)

medium

b)

vacuum

c)

gas

26.

How heat energy is being transferred through ironing of clothes?

a)

Conduction

b)

Convection

c)

Radiation

27.

How heat energy is being transferred through cool air coming from an air conditioner?

a)

Conduction

b)

Convection

c)

Radiation

28.

How heat energy is being transferred through heat coming from a bonfire

a)

Conduction

b)

Convection

c)

Radiation

29.

TRUE or FALSE.


Light energy is a kind of kinetic energy.

a)

TRUE

b)

FALSE

30.

TRUE or FALSE.


Light is made up of tiny packets of energy called photons.

a)

TRUE

b)

FALSE

31.

TRUE or FALSE.


Light energy travels on a zigzag line.

a)

TRUE

b)

FALSE

32.

What kind of lever is the seesaw?

a)

First-class lever

b)

Second-class lever

c)

Third-class lever

33.

A screw is a special kind of what simple machine?

a)

Inclined plane

b)

Lever

c)

Wheel and axl

34.

What is a device consisting of few parts used to make work easier and faster by reducing the effort or force used in doing to work?

a)

Simple machine

b)

Complex machine

c)

Washing machine

35.

Which of the following best describes the use of friction?

a)

Friction makes an object slide.

b)

Gravity pushes an object upward.

c)

Force is needed to stop an object.

d)

An object in motion will remain in motion.

36.

What would happen if youl sat on a grassy hillside?

a)

you will stay in place.

b)

you will fall downhill.

c)

you will increase your weight.

d)

you will accelerate

37.

Jack is playing with a toy push car. On which surface would his toy push car

travel the fastest?

a)

Carpet

b)

Sand

c)

Tiled floor

d)

Sandpaper

38.

All of the materials below can reduce friction EXCEPT.

a)

Bearings

b)

Lubricants

c)

Sand

d)

Wax

39.

Your mother asked you to polish the floor. What will happen to the friction of

the floor after you polish it?

a)

Friction will decrease.

b)

Friction will increase.

c)

Friction makes you float.

d)

Friction remains the same.

40.

When you hold a glass, you keep it from falling using the friction between your

hand and the glass. How does friction prevent the glass from falling?

a)

The friction of the glass is smooth.

b)

Your fingers and the glass stick together.

c)

The friction acts upwards, opposing the downward pull of gravity.

d)

The friction acts downwards, opposing the upward pull of gravity.

41.

Friction is beneficial to our daily lives, but sometimes we can find it less

helpful. Which of the following activities shows that friction is undesirable?

a)

Lighting matchsticks

b)

Pushing furniture

c)

Walking on the wet floor

d)

Using brake when approaching a road intersection

42.

Jupiter has greater gravity than Earth, therefore, you will weigh more on Jupiter.

a)

True

b)

False

43.

The Law of Universal Gravitation was developed by _______. 

a)

Galileo Galilei

b)

Sir Isaac Newton

c)

Aristotle

d)

Batman

44.

The farther a planet is from the Sun, the lesser the gravitational pull.

a)

True

b)

False

45.

When distance between two objects is greater, the force of gravity is smaller.

a)

True

b)

False

46.

Gravitational force depends on _____.

a)

The distance between the objects

b)

The mass of the objects

c)

The mass of the objects and the distance between them

d)

The volume of the objects

47.

If two objects are compared at a certain distance, according to Newton's Law of Universal Gravitation, what is true? Select all the phrases that apply

a)

Both objects have mass and therefore they have no gravitational force.

b)

Lower mass objects have less gravitational force.

c)

Lower mass objects have more gravitational force.

d)

Higher mass objects have stronger gravitational force.

48.

TRUE or FALSE? The gravitational force becomes smaller as objects move closer to each other.

a)

True

b)

False

49.

The objects in the following diagrams have different masses and are different distance apart. Which diagram shows the two objects that have the greatest force of gravity acting between them?

a)

Diagram A

b)

Diagram B

c)

Diagram C

d)

Diagram D

50.

Which of the following roles does gravity play in our solar system?

a)

it keeps the planets in orbit around the Sun

b)

it keeps the moon in orbit around the Earth

c)

it causes all things to fall to the ground

d)

all of the above

51.

The scientific law that states that every object in the universe attracts every other object

(a)  

52.

The attractive force between objects; the forces that moves objects downhill

(a)  

53.

A measure of how much matter an object is made of

(a)  

54.

Two factors effecting the magnitude of the force of gravity between 2 objects are _____ and _______.

a)

mass and distance

b)

mass and matter

c)

distance and weight

d)

weight and mass

55.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
more
b)
same
c)
dosen't matter
d)
less
56.

This property refers to the amount of matter present in an object.

(a)  

57.

Gravitational force of the sun is ________ compared to the moon because it is more massive.

a)

stronger

b)

weaker

c)

the same as

58.

The greater the distance of a planet from the Sun, the __________ the gravitational pull of the Sun for that planet.

a)

stronger

b)

weaker

c)

the same as

59.

Weight is measured in _______, while mass is measured in _______.

a)

kilogram;  Newton

b)

Newton;  kilogram

c)

gram;  ton

d)

ton;  gram

60.

Friction is a force that results from two surfaces of different objects rubbing against each other. 

a)

True

b)

False

61.

In a vacuum, a metal ball will fall faster than a feather when falling from the same height.

a)

True

b)

False

62.

To resist friction, the force applied must be weaker than friction itself.

a)

True

b)

False

63.

Fluid friction occurs when an object is in contact with water or air.

a)

True

b)

False

64.

A man pushing a box on a rough surface will be able to do it faster than a man pushing a box on a smooth surface

a)

True

b)

False

65.
What type of friction is not moving?
a)
static
b)
sliding
c)
fluid
d)
rolling
66.
The amount of friction depends on the weight of the objects pressing together.
a)
True
b)
False
67.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
68.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)

All given examples are helpful

69.
Which of the following is an example of friction that is harmful?
a)
Pencil marking on paper
b)
Engine parts wearing out
c)
sand placed on ice in the winter
d)
Using an eraser to erase marks
70.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
71.
Swimming fish experience-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
72.
How does friction affect speed?
a)
more friction decreases speed
b)
more friction increases speed
c)
less friction decreases speed
73.
What are 2 factors that determine the amount of friction between 2 objects?
a)
Force and roughness between surfaces
b)
hills and valleys and how smooth or rough the surface is
c)
Amount of force and amount of surface the comes in contact
d)
The force and the weight exerted on the surfaces
74.
What is produced by the friction of two surfaces rubbing against one another?
a)
matter
b)
steam
c)
electricity
d)
heat
75.

Will it be easier for a person to push a table on a carpeted floor than on tiled floor?

a)

No, because the carpeted floor is rough, so friction is lesser.

b)

No, because the carpeted floor is rough, so friction is greater.

c)

Yes, because the carpeted floor is smooth, so friction is lesser.

d)

Yes, because the carpeted floor is smooth, so friction is greater.

76.

When can we say that friction on a floor is greater?

a)

If the floor is wet.

b)

If the floor is tiled.

c)

If the floor is rough.

d)

If the floor is smooth.

77.

Which force causes a rolling ball to stop after a few seconds?

a)

friction

b)

gravity

c)

magnetic

d)

motion

78.

Why is difficult to move heavy objects on a rough surface?

a)

rough surface is slippery

b)

there is no friction on a rough surface

c)

there is lesser friction on a rough surface

d)

there is greater friction on a rough surface

79.

When you are travelling along a road, how does the wet road affect friction?

a)

It increases friction.

b)

It decreases friction.

c)

It maintains friction.

d)

It increases and decreases friction.

80.
Wheels on a skateboard most likely experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
81.
Sally experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
82.
Wheels of a shopping cart experience-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
83.
How can friction be reduced?
a)
reduce the force acting between the 2 surfaces
b)
reduce the roughness of the 2 surfaces coming in contact
c)
use wax, grease or oil
d)
all of the above are ways of reducing friction
84.

Which of these materials do you predict would have the MOST amount of friction?

a)

metal

b)

tile

c)

sand paper

d)

denim

85.
On which surface will a toy car travel the furthest?
a)
Carpet
b)
Polished Wood
c)
Ice
86.

In a vacuum defying air resistance, which of the following objects will fall fastest and hit the ground first?

a)

Uncrumpled paper

b)

Rock

c)

Coin

d)

All will land at the same time.

87.

Work is done when an object moves at a certain distance when force is applied

a)

True

b)

False

88.

Simple machines contain two or more simple machines.

a)

True

b)

False

89.

Pulleys and levers are examples of compound machines.

a)

True

b)

False

90.

Riding a bicycle, the wheels and axles make the bicycle move from one place to another place.

a)

True

b)

False

91.

Machines make work harder by lessening the force applied to an object.

a)

True

b)

False

92.

Is a flat surface whose one end is higher than the other to lift heavy objects with relatively little effort.

a)

Wedge

b)

Inclined Plane

c)

Screw

d)

Pulley

93.

Is a simple machine made up of two inclined planes placed back to back creating a thick base and a sharp edge.

a)

Wedge

b)

Inclined Plane

c)

Wheel and axle

d)

Lever

94.

Is another simple machine, which consists of an inclined plane wrapped around a cylinder.

a)

Wedge

b)

Lever

c)

Pulley

d)

Screw

95.

Is a grooved wheel that turns around an axle which is held in place by a mounting bracket. Rope and wire moves along the wheel's circumference.

a)

Screw

b)

Inclined plane

c)

Pulley

d)

Lever

96.

It has the same appearance with a pulley, but is has a wheel that is fixed to the axle, like in the steering wheel of a car.

a)

Incline plane

b)

Lever

c)

Wedge

d)

Wheel and axle

97.

Machines are used to transform, transfer energy, multiply speed or force, and change the direction of the force.

a)

True

b)

False

98.

Do work in one movement or a one-type-of-work easing device.

a)

Compound machine

b)

Simple machine

c)

Washing machine

d)

Factory machine

99.

The following are examples of compound machines EXCEPT..

a)

Bicycles

b)

Sewing machines

c)

Scissors

d)

Crowbar

100.

The following are parts of a lever.

a)

Resistance

b)

Effort

c)

Fulcrum

d)

Distance

101.

Simple machines make work easier by trading ________ for force.

a)

Distance

b)

Motion

c)

Work

d)

Friction

102.

Levers consist of a fulcrum, load, and effort

a)

True

b)

False

103.

In a second-class lever, the load is between the effort and the fulcrum.

a)

True

b)

False

104.

Which class of lever is in the image?

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

105.

Which class of lever is in the image?

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

106.

Which class of lever is in the image?

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

107.

Which class of lever is in the image?

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

108.

Which class of lever is in the image? (nutcracker)

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

109.

Which class of lever is in the image? (broom)

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

110.

Which class of lever is in the image? (crowbar)

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

111.

Which class of lever is in the image? (food tongs)

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

112.

Which class of lever is in the image? (fishing rod)

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

113.

Which class of lever is in the image? (tweezers)

a)

CLASS 1

b)

CLASS 2

c)

CLASS 3

114.

What class lever is a seesaw?

a)

1st

b)

2nd

c)

3rd

115.

What class lever is a baseball bat?

a)

1st

b)

2nd

c)

3rd

116.

What class lever does this picture show?

a)

1st

b)

2nd

c)

3rd

117.

What class lever does this picture show?

a)

1st

b)

2nd

c)

3rd

118.

What class lever does this picture show?

a)

1st

b)

2nd

c)

3rd

119.

What class of lever does this picture show?

a)

First class lever

b)

Second class lever

c)

Third class lever

120.

What class of lever does this picture show?

a)

First class lever

b)

Second class lever

c)

Third class lever

121.

What class of lever does this picture show?

a)

First class lever

b)

Second class lever

c)

Third class lever

122.

The wheel is attached to the object or load.

a)

Fixed Pulley

b)

Movable Pulley

c)

Compound Pulley

123.

The effort force applied is equal to the load.

a)

Fixed Pulley

b)

Movable Pulley

c)

Compound Pulley

124.

The wheel is attached to a fixed support.

a)

Fixed Pulley

b)

Movable Pulley

c)

Compound Pulley

125.

It changes the direction of the force.

a)

Fixed Pulley

b)

Movable Pulley

c)

Compound Pulley

126.

The effort force applied is less than the load.

a)

Fixed Pulley

b)

Movable Pulley

c)

Compound Pulley

127.

What does this image represent?

a)

A pulley

b)

A wedge

c)

A lever

d)

A wheel and axle

128.

Identify the type of pulley

a)

fixed

b)

moveable

c)

block and tackle or pulley system

129.

Identify the type of pulley

a)

Fixed

b)

Moveable

c)

Block and Tackle or pulley system

130.
The diagram shows a movable pulley system. When moving a load, this pulley system changes the —
a)
direction of the force.
b)
amount of force needed.
c)
pull of gravity on the load.
d)
overall mass of the rope.
131.

Which of the following is an example of a pulley?

a)

flag pole

b)

see saw

c)

jump rope

132.
In which situation will the pulley reduce the force needed to lift the load?
a)
A
b)
B
c)
C
d)
D
133.
An inclined plane reduces the amount of force needed to move an object by - 
a)
increasing the distance the object moves.
b)
transferring more of the force to the object
c)
reversing the direction the object is moved.
134.
A fixed pulley does not reduce the force needed to lift an object. What, then, is the advantage of using a fixed pulley?
a)
A fixed pulley reduces the force.
b)
A fixed pulley changes the direction of the force.
c)
A fixed pulley does not have any advantages.
135.

In a simple machine, what is the load?

a)

point where the lever arm pivots

b)

the force needed to move the load

c)

the mass lifted by a system

d)

the distance the load travels

136.

What is the unit used to measure force?

a)

meter

b)

gram

c)

Newton

d)

liter

137.

Work is done when an object moves at a certain distance when force is applied. 

a)

True

b)

False

138.

Which of these is an example of a wedge?

a)

wheel

b)

spoon

c)

seesaw

d)

butter knife

139.

Which of these is an example of inclined plane?

a)

wheel

b)

slide

c)

wall

d)

driveway

140.
What is this?
a)
a screw 
b)
a wedge
c)
an inclined plane
141.

Which inclined plane requires the most effort to push the ball to the top?

a)
b)
c)
d)
142.

Which of the following inclined planes would require the least amount of effort to lift a box?

a)
b)
c)
d)

They all require the same amount of effort.

143.

Which of the following is TRUE?

a)

Ramps increase work

b)

Ramps make it harder to move things

c)

Ramps reduce the amount of effort

d)

Inclined planes are only found in buildings

144.
What is a disadvantage of using an inclined plane to lift a heavy object?
a)
The object must be moved a greater distance.
b)
It takes less effort to move the object.
c)
Many objects are difficult to lift straight up.
d)
Heavy object usually take up more space.
145.
Which has the longer distance - straight lift from the ground directly to the back of truck or using an inclined plane?
a)
Straight lift
b)
Inclined plane
c)
They are the same
146.
The greatest amount of force is required to move the metal block up which inclined plane?
a)
A
b)
B
c)
C
d)
D
147.

Is a waterslide an inclined plane?

a)

Yes

b)

No

148.

Is a staircase an inclined plane?

a)

Yes

b)

No

149.

What is a screw?

a)

Move heavy loads vertically.

b)

Is an inclined plane around a cylinder that fastens two objects together.

c)

An object used to tear apart.

d)

A wheel and a rope to move or change direction of an object

150.

Which object is NOT considered a screw?

a)

Bolt

b)

Drill Bit

c)

Light Bulb

d)

Nail

151.

Which of the following is an example of a screw?

a)

nail

b)

ramp

c)

jar lid

152.

It is a contact force, that exists when one surface slides over another, affected by the irregularities in the surfaces of two objects in contact during sliding or rolling, it resists motion.

(a)  

153.

It is a downward force acting on an object.

(a)  

154.

This is formed when two objects are rubbed together causing the electrons to move from one object to another.

(a)  

155.

This is the type of friction that keeps an object at rest.

(a)  

156.

This is the resistive force that slows down a moving object.

(a)  

157.

This kinetic friction acts on dry , solid objects sliding on a surface.

(a)  

158.

This is a kinetic friction that acts on objects with wheels, where it slows down the motion of the wheels on the solid surface.

(a)  

159.

This is a kinetic friction that acts on an object that is falling or moving through air.

(a)  

160.

Which of these has the tendency to change the state of motion of an object?

a)

acceleration

b)

force

c)

mass

d)

weight

161.

Which type of friction is evident on a ball thrown upward?

a)

air friction

b)

rolling friction

c)

sliding friction

d)

static friction

162.

Which of the following shows a rolling friction?

a)

swimming

b)

flying a kite

c)

playing on a slide

d)

pushing a supermarket cart

163.

Which of the following shows an object in motion?

a)

a book on top of a table

b)

a car that is parked on a lot

c)

a child running around a tree

d)

a dog that is resting under a tree

164.

When you push a ball in the same direction it is rolling, what will happen to the ball?

a)

It will slow down.

b)

It will move faster.

c)

It will continue to move.

d)

It will slow down then move fast again.

165.

When you push a cart and it does not move. The force you applied is _____________ the force of friction acting on the cart.

a)

less than

b)

more than

c)

equal to or less than

d)

almost the same with

166.

If you push a cart and it moves, the friction force is ____________ your applied force.

a)

less than

b)

more than

c)

equal to

d)

equal to or more than

167.

If you want to maintain the motion of a moving object the force needed is

a)

zero

b)

equal to the kinetic friction

c)

less than the kinetic friction

d)

more than the kinetic friction

168.

What causes your hair to stand after being rubbed against a balloon?

a)

friction

b)

gravity

c)

heat

d)

static electricity

169.

Which of the following shows an object experiencing gravitational force? (Tick all that are applicable.)

a)

a car rolling down the hill

b)

falling leaves from a tree

c)

tears falling from the eyes

d)

egg rotting inside a refrigerator

e)

the windmill keeps on turning

170.

The energy that an object has due its position or motion, can be potential energy or kinetic energy, can be observed in a swinging pendulum, a moving Ferris wheel, a rushing avalanche , a book on the shelf, and other objects that are in motion or at rest.

(a)  

171.

The stored energy possessed by objects that are at rest.

(a)  

172.

The energy possessed by objects that are

moving.

(a)  

173.

The energy possessed by sound waves.

(a)  

174.

The energy possessed by an object due to the movement of particles within it.

(a)  

175.

Energy from within Earth is called (a)   .

176.

The thermal energy from bodies of water such as the ocean is called (a)   .

177.

The energy carried by electromagnetic waves, also know as radiation.

(a)  

178.

The form of radiant energy that is visible to human eyes.

(a)  

179.

The most commonly used form of energy, where most household appliances, including the computer, radio, and television, are powered by it, and results from the flow of electric charge.

(a)  

180.

The energy that is stored in the nucleus of an atom and is released during nuclear reactions.

(a)  

181.

The energy which is stored in the bonds of chemical compounds.

(a)  

182.

These are machines that can be found inside your house, school, or even in every industrial place, that are considered basic machines that aid humans with their work or activity.

(a)  

183.

Also known as the ramp, is the simplest of all machines, where one of its ends is higher than the other, allowing things to go from a lower place to a higher place or vice versa.

(a)  

184.

This simple machine is a long rigid bar that rotates around a fulcrum.

(a)  

185.

What do you call the pivot point of a lever?

(a)  

186.

What do you call the pivot point of a lever?

a)
fulcrum
b)

screw

c)

bolt

d)

nut

187.

Which of the following statements is true?

a)

Energy can be created and destroyed.

b)

Energy can neither be created nor destroyed.

c)

Energy can be created but cannot be destroyed.

d)

Energy cannot be created but can be destroyed.

188.

What type of energy is supplied to a car engine by fuel?

a)

chemical

b)

electrical

c)

nuclear

d)

potential

189.

Which of the following is a tool that can multiply force or speed of work, change the direction of force, and transform energy?

a)

cup

b)

lever

c)

machine

d)

wrench

190.

Which of the following energy transformations takes place for a battery­ operated flashlight to work?

a)

chemical energy ---+ electrical energy ---+ light energy

b)

thermal energy ---+ mechanical energy ---+ chemical energy

c)

mechanical energy ---+ chemical energy ---+ thermal energy

d)

chemical energy ---+ thermal energy ---+ mechanical energy

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