Earth & Space Review

Front

What are the phases of the moon?

Back

The phases of the moon are the different shapes of the moon as seen from Earth, which change in a cycle due to the moon's position relative to Earth and the sun.

Front

What is the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell 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 causes the seasons on Earth?

Back

Seasons are caused by the tilt of Earth's axis and its orbit around the sun, leading to varying angles of sunlight at different times of the year.

Front

What is the equator?

Back

The equator is an imaginary line that divides the Earth into the Northern and Southern Hemispheres, located equidistant from the poles.

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to change its state of motion, such as starting, stopping, or changing direction.

Front

How does gravity affect Earth's motion?

Back

Gravity is the force that pulls Earth toward the sun, keeping it in an elliptical orbit around the sun.

Front

What is the significance of the North Pole's tilt?

Back

The tilt of the North Pole affects the amount of sunlight received, influencing seasonal changes and the length of day and night.

Front

What is the difference between day and night?

Back

Day occurs when a part of Earth is facing the sun, while night occurs when that part is turned away from the sun.

Front

What is a solar eclipse?

Back

A solar eclipse occurs when the moon passes between Earth and the sun, blocking all or part of the sun's light.

Front

What is a lunar eclipse?

Back

A lunar eclipse occurs when Earth passes between the sun and the moon, causing Earth's shadow to fall on the moon.