Light
Force
Energy
Circuits and Electricity
Random
100
Which of the following best models how light is reflected?
A An arrow hitting a target.
B A ball bouncing off a wall.
C An apple falling from a tree.
D A marble rolling down a ramp.
B A ball bouncing off a wall.
100
A science class wanted to know if a golf ball and a table tennis ball would roll the same distance after rolling down a ramp. Which of the following shows a fair test of this idea?
A 
B
C
D
C
100
What form of energy does a lamp use to produce light?
A Mechanical
B Thermal
C Electrical
D Sound
C Electrical
100
A battery is attached to a buzzer with wire as shown.
The buzzer will make noise only when -
A another wire connects the buzzer to the battery.
B the battery is replaced with a stronger one.
C a switch that can open and close is added.
D the wire is replaced with a longer one.
A another wire connects the buzzer to the battery.
100
Students conducted an investigation in which they rolled a soda can down a ramp that was 30 cm high and one that was 40 cm high. Which question were the students most likely trying to answer?
A How does mass of a soda can affect the distance it will roll?
B How does surface friction affect the distance a soda can will roll?
C How does the size of a soda can affect the distance it rolls?
D How does ramp height affect the distance a soda can rolls?
D How does ramp height affect the distance a soda can rolls?
200
Which illustration best shows light being reflected?
200
If a student has two magnets, how might it be determined which magnet is stronger?
A Count how many paper clips each magnet can lift.
B Submerge each magnet in a bowl of water.
C Examine each magnet to determine the north pole.
D Measure the length and the mass of both magnets.
A Count how many paper clips each magnet can lift.
200
All of the following devices produce light energy EXCEPT –
A laser pointers.
B air conditioners.
C fluorescent lamps.
D computer monitors.
B air conditioners.
200
A student attached the parts as shown here and the bulb did not light.
The most likely reason the bulb does not light is because -
A batteries can’t provide electric energy.
B the flow of electricity can’t make a bulb light.
C the switch must be open for electricity to flow.
D yarn does not conduct electricity.
D yarn does not conduct electricity.
200
A student observed that sugar in hot water dissolved more quickly than in cold water. The student was investigating the effects of what form of energy?
A Thermal
B Sound
C Electrical
D Mechanical
A Thermal
300
Light traveling through the air moves in a straight line. An object viewed through water looks different because light rays that travel through water are –
A bent.
B bounced.
C reflected.
D absorbed.
A. bent.
300
Which two tools below would be most useful in testing how the mass of an object can affect the distance it moves after being pushed?
A Spring scale and hot plate
B Balance and meter stick
C Graduated cylinder and beaker
D Magnet and thermometer
B Balance and meter stick
300
After winding, the toy frog flips over. This toy demonstrates what kind of energy?
A Light
B Thermal
C Electrical
D Mechanical
D Mechanical
300
Students created the following circuit in which the bulb lights up. Which of the following changes could make the bulb burn more brightly?
A 
B 
C
D 
B
300
A student uses a set of headphones to listen to music. Which of these objects uses the same source of energy as the headphones?
A A flute using wind energy
B A piano using mechanical energy
C A keyboard using electrical energy
D A teapot using thermal energy
C A keyboard using electrical energy
400
The diagram shows a periscope used to see objects that are behind or under a barrier. What makes it possible to see an object when looking through a periscope? The periscope –
A contains mirrors that reflect the object.
B magnifies small objects so they can be seen.
C absorbs the light rays passing through it.
D separates the light into different colors.
A contains mirrors that reflect the object.
400
Students drop the same heavy ball onto identical blocks of soft clay from different heights. For each height they measure the depth of the dent the ball makes in the clay.
Why is the depth of the dent different in each trial?
A The size of the ball changes.
B The material of the ball changes.
C The mass of the ball when it hits the clay changes.
D The force of the ball when it hits the clay changes.
D The force of the ball when it hits the clay changes.
400
An old fashioned toy carousel begins to turn when the candle underneath it is lit. Which of these correctly describes the energy that makes the carousel turn?
A Heat from the candle produces currents of warm air.
B Heat from the candle produces electrical energy.
C Light from the candle produces mechanical energy.
DLight from the candle produces wind currents.
A Heat from the candle produces currents of warm air.
400
Which of the following correctly shows the configuration of a closed circuit in which the bulb will light?
A
B
C
D
D
400
Students constructed a circuit using different-colored lightbulbs.
What will happen if Switch 3 is closed and the other switches are left open?
A Only the white bulb will operate.
B None of the bulbs will operate.
C Only the white and yellow bulbs will operate.
D Only the red and blue bulbs will operate.
C Only the white and yellow bulbs will operate.
500
Students often use a hand lens to make small objects appear larger. A hand lens makes objects appear larger because the lens —
A increses the light's strength.
B changes the color of the light.
C bends light passing through it.
D converts light energy to heat.
C bends light passing through it.
500
Students conducted an investigation in which they measured the distance a toy car traveled after rolling down a ramp covered with sandpaper or wax paper. Which of these questions can the students answer by analyzing the results of their investigation?
A How does changing the height of a ramp affect the distance a toy car rolls?
B How does changing the surface of a ramp affect the distance a toy car rolls?
C How does mass affect the distance a toy car moves after rolling down a ramp?
D How does the design of a toy car affect its movement after rolling down a ramp?
B How does changing the surface of a ramp affect the distance a toy car rolls?
500
A student made a list of activities that involve energy.
1. Sharks chasing a school of fish.
2. A toaster heating bread.
3. A cell phone charging.
4. A tree limb falling to the ground.
5. Tomato plants absorbing sunlight.
6. A canoe floating down a river.
Which activities on the list are examples of the use of mechanical energy?
A Activities 1, 4, and 6
B Activities 2, 4, and 5
C Activities 1 and 2
D Activities 3, 5, and 6
A Activities 1, 4, and 6
500
A lamp produces light. When the lamp produces light, it demonstrates that the lamp must have a –
A powerful magnet
B rechargeable battery
C closed circuit
D plastic cord
C closed circuit
500
All the lightbulbs in this circuit are lit.
Which change would cause all the bulbs to go out?
A Removing Wire 1
B Removing Wires 2 and 4
C Removing Wires 2 and 5
D Removing Wires 3 and 4
A Removing Wire 1