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WorksheetsUnit 4 CBA Review
Total questions: 20
Worksheet time: 10mins
Mac is a cold-blooded animal, which means that his body temperature varies with the temperature of the environment. Because of this, he cannot live in extremely hot or cold environments. Mrs. Gonzalez places the terrarium on a windowsill so that the sun will shine on the lizard. Which of these could Mrs. Gonzalez use with the terrarium that would help the Mac stay warm at night?
A lamp
A thermometer
A radio
A mirror
Which statement BEST explains why using a lamp with the terrarium would help Mac survive at night?
It is difficult to see in the dark.
The air temperature is cooler at night.
It is much more quiet at night.
Moonlight can reflect from the plants.
In the circuit shown, which energy transformation occurs when the switch is closed?
mechanical → electrical → light
light → electrical
chemical → electrical → light
mechanical → thermal
In the circuit shown with a battery, switch, wires, and a light bulb, which statement best supports the energy transformation that occurs when the switch is closed?
After the switch is manually closed, electrical energy travels through the closed circuit and turns on the light.
The light energy from the bulb travels through the circuit and gets stored in the battery as electrical energy.
Chemical energy stored in the battery converts into electrical energy and then travels through the circuit and lights up the bulb.
When the switch is manually closed, the light bulb automatically turns on and radiates thermal energy.
When Priya is outside on a chilly day, she rubs her hands together very quickly to warm them up. Why does this happen?
Thermal energy is converted to electricity.
Mechanical energy is converted to thermal energy.
Mechanical energy is converted to sound.
Electrical energy is converted to mechanical.
Maria placed her pinwheel near a sunny window. As the warm air from the sun entered the room, the pinwheel started to spin. Which energy transformation best explains how the pinwheel moves?
heat energy to mechanical energy
light energy to sound energy
mechanical energy to heat energy
chemical energy to mechanical energy
Grace installs solar panels to power the heater in her house. Which type of energy conversion occurs when this happens?
electrical to light
light to thermal
chemical to electrical
thermal to chemical
A student was feeling warm while studying, so he plugged in a fan to help cool down. The fan uses electrical energy, but what type of energy is responsible for the spinning motion of the fan blades?
mechanical
light
chemical
thermal
What is the energy transformation that occurs in a flashlight?
chemical energy → electrical energy → light energy
electrical energy → chemical energy → light energy
light energy → electrical energy → chemical energy
chemical energy → light energy → electrical energy
Two students set up an investigation using a lamp, a tank of water, ice cubes, and a rock as pictured. What is the best possible claim they might investigate with the equipment they have?
The total weight of the rocks affects the total weight of the ice cubes.
The number of rocks affects the heat received from the lamp.
The amount of water in the cup affects how fast the ice cubes melt.
The amount of time that the light shines on the tank affects how fast the ice cubes melt.
Emma sets up the circuit shown in the diagram. What do the lightbulb and the bell do when the switch is left open?
The lightbulb glows, and the bell rings.
The lightbulb glows, and the bell does not ring.
The lightbulb does not glow, and the bell rings.
The lightbulb does not glow, and the bell does not ring.
Jack builds the circuit shown. Jack closes Switch 1 and Switch 3. Which lightbulb will glow? Select ONE correct answer.
L1
L2
L3
L4
Walker, Will, and Wesley build the electric circuit shown. Which switches must be closed for Bulb 1 to remain dark but Bulb 2 to produce light?
Switch 1 only must be closed.
Switches 2 and 3 must be closed.
Switches 1 and 3 must be closed.
Switches 1, 2, and 3 must be closed.
Students made the circuit shown. Cutting the wire at which numbered position would allow two of the lightbulbs to remain lit?
Position 1
Position 2
Position 3
Position 4
Which change to the circuit shown below would result in no working lightbulbs?
opening the switch
removing wire D
cutting wire F
disconnecting wire B from the switch
Imelda, James, Ian, and Tori built the circuit below. Each one of them tried to explain why the bulb did not work. Part A: Which student gave the best claim for why the light did not glow?
Imelda said, "The battery is dead."
James said, "A wire is broken."
Ian said, "The switch is open."
Tori said, "The lightbulb is broken."
A student builds the circuit seen below. It includes a battery, wires, two switches, a light bulb, and a buzzer. What will happen to the bulb and the buzzer if the switches remain in the same positions as shown?
The buzzer will make sound and the light bulb will remain unlit.
The light bulb will light up and the buzzer will be silent.
Both the light bulb and the buzzer will be off.
Both the light bulb and the buzzer will operate.
A student designed the circuit above. What would most likely happen if the student closed Switch 1, Switch 2, and Switch 4?
Bulb A would light up and the bell would ring, but bulb B would not light up
Bulb B would light up, but bulb A would not light up and the bell would not ring
Neither of the bulbs would light up, and the bell would not ring
Both of the bulbs would light up, but the bell would not ring
A student observes a hotplate on a table. The hotplate has an on/off switch and a dial to control the temperature. The hotplate is not in use now, but will be used in the science class investigation on electrical circuits. In order to use the hotplate during a science investigation, what must the student do to the hotplate to complete the circuit?
Plug the hotplate into the outlet
Turn the switch to the "on" position
Plug in the hotplate and place a beaker on the plate
Plug in the hotplate and turn the switch to the "on" position
A student placed two batteries in a flashlight in the order shown below. The flashlight will not turn on. Based on the evidence observed above, what is the best explanation as to why the flashlight will NOT turn on?
The bulb is burned out.
The batteries are old.
The arrangement of the batteries does not allow a complete circuit.
The arrangement of the batteries allows for a complete circuit.
