Science solar system test

What causes day and night on Earth?

Earth's rotation on its axis.

The Earth takes about how long to complete one revolution around the Sun?

365.25 days.

Seasons are caused by:

The tilt of Earth's axis and its revolution around the Sun.

When it is summer in the Northern Hemisphere, the Southern Hemisphere is experiencing:

Winter

Which object exerts the most gravitational pull in our solar system?

The Sun.

What causes ocean tides?

The gravitational pull of the Moon (and to a lesser extent, the Sun).

Earth’s axis is tilted at an angle of about:

23.5 degrees.

The Moon reflects light from the:

Sun.

1. A __________ eclipse occurs when the Moon moves directly between the Earth and the Sun.
   

solar

The __________ is the phase of the Moon when the entire face is visible from Earth.

Full Moon.

The Earth completes one full rotation approximately every:

24 hours.

The __________ Hemisphere is tilted toward the Sun in December.

Southern Hemisphere.

Explain how the tilt of Earth’s axis causes the seasons.

The tilt causes different parts of Earth to receive varying amounts of sunlight throughout the year as Earth revolves around the Sun.

How does the angle of sunlight affect temperature on Earth?

The more direct the sunlight (higher angle), the warmer it is. The lower the angle, the cooler the temperature.

Describe two effects the Moon has on Earth.

Causes tides; stabilizes Earth's tilt which helps regulate seasons.

Why do we always see the same side of the Moon from Earth?

Because the Moon's rotation and revolution take the same amount of time (synchronous rotation).