DCA2 Part 1 Review

Front

What heats the Earth's oceans?

Back

The sun heats the Earth's oceans.

Front

Which category of an HR Diagram contains the most stars?

Back

The Main Sequence category contains the most stars.

Front

What causes wind?

Back

Wind is caused by the movement of air from high pressure to low pressure.

Front

What type of air would you find at air mass B?

Back

At air mass B, you would find warm, humid air.

Front

Which wave has the longest wavelength?

Back

Radio waves have the longest wavelength.

Front

What is the main source of energy for the Earth?

Back

The sun is the main source of energy for the Earth.

Front

What is an HR Diagram?

Back

An HR Diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What is the difference between high pressure and low pressure areas?

Back

High pressure areas are associated with descending air and clear skies, while low pressure areas are associated with rising air and cloudy, stormy weather.

Front

What is the significance of the Main Sequence in stellar evolution?

Back

The Main Sequence is where stars spend most of their lifetime, fusing hydrogen into helium in their cores.

Front

What are the characteristics of warm, humid air?

Back

Warm, humid air is less dense than cold, dry air and can hold more moisture, leading to cloud formation and precipitation.