12/12 (Th) Unit 8/9 Earth and Space Practice

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 include new moon, first quarter, full moon, and last quarter.

Front

What causes day and night on Earth?

Back

Day and night are caused by the rotation of Earth on its axis. When one side of Earth faces the sun, it experiences daytime, while the opposite side experiences nighttime.

Front

What is a sundial?

Back

A sundial is a device that tells the time by using the position of the sun's shadow cast by a gnomon (a stick or a triangular blade) on a flat surface marked with hours.

Front

How long does it take for the moon to complete one full cycle of phases?

Back

It takes approximately one month (about 29.5 days) for the moon to complete one full cycle of phases from new moon to new moon.

Front

What is the main component of the sun?

Back

The sun is mostly made of hydrogen and helium.

Front

What is a shadow?

Back

A shadow is a dark area or shape produced by a body coming between rays of light and a surface.

Front

What causes shadows to move during the day?

Back

Shadows move during the day because of the rotation of Earth, which changes the position of the sun in the sky.

Front

What is the lunar cycle?

Back

The lunar cycle is the sequence of phases the moon goes through as it orbits Earth, including new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, and waning crescent.

Front

What is the difference between a solar eclipse and a lunar eclipse?

Back

A solar eclipse occurs when the moon passes between Earth and the sun, blocking the sun's light. A lunar eclipse occurs when Earth passes between the sun and the moon, casting a shadow on the moon.

Front

What is the role of gravity in the solar system?

Back

Gravity is the force that keeps planets, moons, and other celestial bodies in orbit around the sun and each other.