Energy Conversions Chapter 2

The function of a radio is to ____ music.

What is the input energy for an electrical lamp?

• Solar energy
• Mechanical energy
• Chemical energy
• Electrical energy

What is the output energy for an electrical motor?

• Motion energy

• Chemical energy
• Thermal energy
• Nuclear energy

Tags

NGSS.HS-PS3-3

What is the output energy for an electrical fan?

• Motion Energy

• Chemical Energy
• Nuclear Energy
• Thermal Energy

During storms, towns may experience blackouts because something goes wrong with their electrical system. What is the best evidence that would support the claim that something went wrong with their electrical system?

• After the blackout, all of the lights came back on.

• The storm knocked down all of the power lines.

• The electrical grid connected to the skyscraper fails to work properly.

• The mayor of the town turns the electricity off to save energy.

The picture shows energy converters used in homes every day. Which statement describes the relationship between all of the converters pictured?

• They all have an output energy of motion.

• Electrical energy is the input energy for all the devices.

• Sound energy is converted to electrical energy in all the devices.

• Thermal energy is the input energy for all the devices. 

Tags

NGSS.MS-PS3-5

Devices will not have enough energy to function if  __________________________ energy is needed from the system than what is put in the system. 

• less
• more
• equal
• none

When you rub your hands together really fast, they get hot, therefore you are converting ___ into ___.

• thermal into mechanical

• mechanical into thermal

• electrical into thermal

• sound into thermal

Tags

NGSS.MS-PS3-5

4th grade is hosting its annual Science Fair. Tom and Judy decide to make a simple electrical system. The students named their electrical system the Super Solar Electric Flywheel. The parts for the system are the sun, solar panel, motor, and the flywheel. What part of the system is the electrical converter for the system?

• The sun
• The motor
• The flywheel
• The solar panel

Tags

NGSS.4-PS3-4

Ana and John struck different materials with a steel rod to see which materials would create a spark. The materials they used for striking are shown in Figure 1.

Ana strikes the flint hard with the steel rod. Based on the data collected in Table 1, which claim is best supported by the observation that a spark is produced when the flint is struck hard?

• Heat is transferred to Ana.

• Heat is transferred to the flint.

• Matter is transferred to the flint.

• Energy is transferred to Ana.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-5