Energy II

Front

What is the red shift in light from distant galaxies?

Back

The red shift indicates that the universe is expanding, as the wavelengths of light are lengthened.

Front

What is the significance of a glacial ice sheet in terms of insolation?

Back

A glacial ice sheet reflects the greatest amount of insolation due to its high albedo.

Front

What happens to temperature when water vapor condenses into liquid water?

Back

The temperature stays the same during the phase change.

Front

What is the heat energy change when water freezes?

Back

Water releases 334 Joules of heat energy per gram when it changes from liquid to solid.

Front

Define insolation.

Back

Insolation is the amount of solar radiation received by a surface.

Front

What is the relationship between temperature and phase changes in water?

Back

During phase changes, temperature remains constant while heat energy is absorbed or released.

Front

What does it mean when light from a galaxy shows a blue shift?

Back

A blue shift indicates that the galaxy is moving closer to us, suggesting the universe is contracting.

Front

Explain the concept of albedo.

Back

Albedo is the measure of reflectivity of a surface, with higher values indicating more reflection of solar energy.

Front

What is the process of condensation in the water cycle?

Back

Condensation is the process where water vapor cools and changes into liquid water, releasing heat.

Front

What is the Joule?

Back

A Joule is a unit of energy in the International System of Units (SI), defined as the energy transferred when a force of one newton is applied over a distance of one meter.