Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?

chemical to electrical to light

chemical to light to electrical

4. When the temperature outside rises, the temperature of the air in the house rises as well. Why is the 2nd floor air warmer than the 1st floor? __________________________________________________________________________________

Convection. Warm air rises to 2nd floor.

Conduction. The 1st and 2nd floor are touching.

Radiation. The sun is heating the whole house.

What happens to the temperature of a object as it moves faster?

temperature increases then decreases

Jake says his thermometer reads 65 degrees and Jessie says her thermometer says 18 degrees. Their teacher says they are both correct. How is this true?

Jake is using a thermometer that measures heat in degrees Fahrenheit and Jessie's thermometer measures degrees Celsius.

Jake is in a different country than Jessie.

Jessie's thermometer is working and Jake's is not working.

If you place a cold cup of water in the direct sunlight on a hot day, what change will take place in the thermal energy of the particles that make up the water?

The solar energy will cause the water to warm up. This will cause the particles of water to change from moving very slowly-less thermal energy (when cold) to moving quickly as they gain thermal energy (warm up).

The particles will remain the same.

The solar energy will cause the particles will slow down because the sun will make the water warmer.

The particles will become smaller when the sun's energy heats the water up.

Identify and explain the different types of heat transfer (convection, conduction, radiation) occurring in the following scenario. Chris went on a camping trip. During the day it was so hot that he got sunburn. When it was time to go to his campsite, he noticed smoke in the air. His father had started a fire and he felt the heat as he walked by. In the morning while his mother was cooking breakfast he accidentally touched a hot pan and got burned. Although this was the case he still had a lot of fun on the trip.

Sunburn = radiation; Smoke rising = convection; Feeling fire = radiation; Touching hot pan = conduction

Sunburn = radiation; Smoke rising = convection; Feeling fire = radiation; Touching hot pan = convection

Sunburn = radiation; Smoke rising = conduction; Feeling fire = radiation; Touching hot pan = conduction

Which best explains why a hot air balloon floats?

The heated air expands to fill the balloon. The air in the balloon is now lighter than the surrounding air, causing the balloon to rise.

The heated air expands to fill the balloon. The air in the balloon is now heavier than the surrounding air, causing the balloon to rise.

The heated air contracts to fill the balloon. The air in the balloon is now denser than the surrounding air, causing the balloon to rise.

The heated air contracts to fill the balloon. The air in the balloon is now lighter than the surrounding air, causing the balloon to rise.

A student places a cup of cold water on a counter in a hot room. After a short time, the student notices that the water in the cup is no longer cold. Which best explains why the water in the cup is no longer cold?

The heat from the air transferred to the water in the cup, making the water in the cup warmer.

The coldness of the water transferred to the air, making the water in the cup warmer.

The coldness of the water was conducted to the cup, making the water in the cup warmer.

The heat from the air caused the cold water in the cup to condense, making the water warmer.

Mr. Olivares drinks coffee on his way to work. Today, he poured it into a metal travel mug instead of a paper cup. What will he most likely notice about the temperature of his coffee when he gets to work?

His coffee will still be hot, because the mug is metallic.

His coffee will be colder, because the mug is taller.

His coffee will still be hot, because the mug is taller.

His coffee will be colder, because the mug is metallic.

Energy transformation

Physics

KG - University

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

Chemical to light

Electrical to chemical

Electrical to light

Chemical to electrical

Which of the following shows an energy transformation from chemical energy to electrical to light energy?

A bolt of lightning lights the night sky.

A candle glows brightly in the dark.

A fire in a fireplace lights up a room.

A battery causes a flashlight to shine.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What energy transformations take place when a battery-operated radio is in use?

Electrical to chemical to light

Sound to chemical to mechanical

Chemical to electrical to sound

Light to electrical to thermal

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?

mechanical to thermal to electrical

chemical to mechanical to thermal

mechanical to chemical to sound

chemical to sound to electrical

Which of the following devices transforms electrical energy into mechanical energy?

An e-reader

a fan

a manual pencil sharpener

ipod

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The diagram shows a complete circuit with a battery and a buzzer making noise. This circuit works by transforming -

chemical energy to electrical to sound.

electrical energy to thermal to light.

sound energy to electrical to chemical.

mechanical energy to electrical to sound.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A television works by transforming electrical energy into what other kinds of energy?

Light, thermal, and sound

Thermal, chemical, and solar

Sound, mechanical, and electrical

Light, chemical, and mechanical

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Energy transformation

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

Which of the following shows an energy transformation from chemical energy to electrical to light energy?

What energy transformations take place when a battery-operated radio is in use?

People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?

Which of the following devices transforms electrical energy into mechanical energy?

The diagram shows a complete circuit with a battery and a buzzer making noise. This circuit works by transforming -

A television works by transforming electrical energy into what other kinds of energy?

Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?

Which of the following shows the correct order of the energy transformations that occur when green plants produce their food from the Sun’s energy?

The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

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