The picture illustrates the solar panels that power all of the appliances in Joshua's house. What energy transformations occur that enable Joshua to bake cookies for his family in the oven? (1 point)

Question

Responses

heat energy → light energy → heat energy

heat energy → chemical energy → light energy
heat energy → chemical energy → light energy

light energy → electrical energy → heat energy
light energy → electrical energy → heat energy

light energy → electrical energy → chemical energy

Answer 1

The correct response is:

light energy → electrical energy → heat energy

In this process, solar panels convert sunlight (light energy) into electrical energy, which is then used by the oven. The electrical energy is transformed into heat energy to bake the cookies.

Answer 2

As energy is transferred or conserved, some of that energy becomes unavailable to do work. What happens to this unavailable energy?(1 point)
Responses

The unavailable energy is conducted
The unavailable energy is conducted

The unavailable energy is given off as microwaves
The unavailable energy is given off as microwaves

The unavailable energy is destroyed
The unavailable energy is destroyed

The unavailable energy is given off as heat

Answer 3

The correct response is:

The unavailable energy is given off as heat.

When energy is transferred or transformed, some of it often becomes thermal energy, which is typically dissipated as heat and is no longer available to do work.

Answer 4

Betsy uses an electric alarm clock to wake up for school. What energy transformation happens in the alarm clock to help her wake up?(1 point)
Responses

sound energy converts to kinetic energy
sound energy converts to kinetic energy

electrical energy converts to sound energy
electrical energy converts to sound energy

electrical energy converts to heat energy
electrical energy converts to heat energy

chemical energy converts to electrical energy

Answer 5

The correct response is:

electrical energy converts to sound energy.

In the electric alarm clock, electrical energy is used to produce sound energy, which is what helps Betsy wake up.

Answer 6

An aluminum block has a starting temperature of 300oC. The block is placed into 200 milliliters of water, which has a temperature of 20oC. What heat transfer will occur?(1 point)
Responses

Heat will flow from the block to the water until both substances have a temperature of 20 degrees Celcius.
Heat will flow from the block to the water until both substances have a temperature of 20 degrees Celcius.

Heat will flow from the block to the water until both have a temperature of 300oC.
Heat will flow from the block to the water until both have a temperature of 300oC.

Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celcius.
Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celcius.

Heat will flow from the block to the water until both substances have the same temperature as their container.

Answer 7

The correct response is:

Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celsius.

Heat will transfer from the hot aluminum block to the cooler water until thermal equilibrium is reached, resulting in a final temperature that is between the initial temperatures of the two substances.

Answer 8

Two samples of pure water are mixed with food coloring. One sample is red, and the other is blue. When the two water samples are combined, the red water floats on top of the blue water. Which statement best explains this result? (1 point)
Responses

The red water is warmer and is less dense.
The red water is warmer and is less dense.

The blue water is colder and is less dense.
The blue water is colder and is less dense.

The blue water is warmer and is more dense.
The blue water is warmer and is more dense.

The red water is colder and is more dense.

Answer 9

The correct response is:

The red water is warmer and is less dense.

Warm water is less dense than cold water, which is why the red water floats on top of the blue water if the red sample is warmer.

Answer 10

Which investigation would best show the transfer of heat energy without any type of matter as a medium?(1 point)
Responses

an investigation of conduction through movement of particles within a solid
an investigation of conduction through movement of particles within a solid

an investigation of radiation using a current within a fluid
an investigation of radiation using a current within a fluid

an investigation of conduction using collisions between particles
an investigation of conduction using collisions between particles

an investigation of radiation using electromagnetic waves

Answer 11

The correct response is:

an investigation of radiation using electromagnetic waves.

Radiation is a method of heat transfer that does not require matter as a medium. It involves the transfer of heat through electromagnetic waves, such as infrared radiation.