Unit 2: Energy Review

Unit 2: Energy Review

Mrs. Hobson

Poll

In Unit 2, we learned about different types of energy and how they transform. Before we begin our review, how comfortable do you feel with the material you learned in Unit 2?

• I'm a PRO!

• I will need to review my notes, but I am going to do very well on the test!

• I think I will do okay but I don't have time to review my notes. It is what it is!

• Energy? What's energy? Is this Science class?

Multiple Choice

Which material is the best conductor of electricity?

• wood

• metal

• stone

• plastic

Multiple Choice

Energy is transferred from the Sun to Earth mainly by...

• sound waves

• air currents

• electromagnetic waves

• compressional waves

Multiple Choice

A thermometer shows that the outside temperature is colder than the temperature at which water turns to ice. However, ice on the sidewalk melts. What probably caused this?

• The air heating the sidewalk.

• The sidewalk reflecting sunlight into the air.

• The wind causing the ice on the sidewalk to melt.

• The sunlight making the sidewalk warmer than the air.

Multiple Choice

In general, metals are...

• poor conductors of heat.

• brittle.

• poor conductors of electricity.

• good conductors of heat.

Multiple Choice

When you hold an ice cube, your hand feels cold because...

• the cold flows from the ice cube to your hand.

• heat flows from your hand to the ice cube.

• ice is a poor conductor of heat.

• your hand is a better conductor of heat than the ice cube.

Multiple Choice

The main method of heat transfer occurring within water is called...

• conduction

• convection

• radiation

• insulation

Multiple Choice

Thermal energy is transferred through a material by the collision of ________ within the material.

• matter

• atoms

• crystals

• electrical currents

Multiple Choice

What kind of energy does a moving baseball have?

• electrical

• sound

• mechanical

• chemical

Multiple Choice

Which kind of energy is produced by generators at a dam?

• nuclear

• electrical

• chemical

• solar

Multiple Choice

Which of the following materials is the best insulator?

• copper

• nickel

• gold

• wood

Multiple Choice

What is the primary source of energy on Earth?

• Sun

• Moon

• Rocks

• Water

Multiple Choice

A copper wire with a wooden handle is being held in a flame. After a few minutes, what will most likely happen?

• the light will change to electricity

• the heat will travel through the wire

• the flame will get brighter

• the flame will go out

Multiple Choice

When a person speaks into a telephone, sound energy is changed mostly into which form or energy?

• heat

• light

• electrical

• chemical

Multiple Choice

What form of energy causes an ice cube to melt?

• mechanical

• magnetic

• sound

• thermal

Multiple Choice

The diagram shows a bulb and a wire attached to a battery. Why would the bulb be lit?

• The battery is out of energy

• The bulb is out of energy

• The circuit is open

• The circuit is closed

Multiple Choice

The picture shows an incomplete electrical circuit that includes a battery, a bulb, and two wires. The bulb is not lit. What should be done in order to light the bulb and complete the circuit?

• Charge the battery

• Connect the two wires

• Flip the battery upside down

• Remove the red wire

Poll

Now that we are done with the review, how comfortable do you feel with the material you learned in Unit 2 now?

• I'm a PRO!

• I will need to review my notes, but I am going to do very well on the test!

• I think I will do okay but I don't have time to review my notes. It is what it is!

• Energy? What's energy? Is this Science class?