Solar system

When Earth spins, it turns around an imaginary line called a(n)

• rotation

• axis

• orbit

• ellipse

Brianna and Mari want to develop a model of how Earth moves in space. In their model, Brianna will represent Earth and Mari will represent the sun. Which of the following should NOT be part of Brianna and Mari's model?

• Brianna walks in a circle around Mari.

• Brianna spins in circles.

• Mari stands still.

• Mari walks in a circle around Brianna.

Why does the sun seem to change position in the sky?

• Earth's rotation

• Earth's orbit

• The sun's rotation

• The sun's orbit

What causes it to appear as if the sun rises and sets each day?

• Earth's gravity

• The spinning motion of Earth

• The revolution of the Earth around the sun

• Earth's distance from the sun

The picture shows a tree and its shadow at two different times of day.

Which sentence explains why the shadow changes?

• As Earth rotates, the sun is lower in the sky in the morning.

• As Earth rotates, the sun is higher in the sky in the morning.

• As the sun rotates, it is lower in the sky in the morning.

• As the sun rotates, it is higher in the sky in the morning.

Look at the picture of the moon.

What will the moon look like in approximately 14 days?

• New Moon

• 1^st Quarter Moon

• 3^rd Quarter Moon

• Full Moon

Dylan observes a fully lit moon. When can he expect to see the moon look like this again?

• In about 12 hours

• In about 24 hours

• In about 15 days

• In about 30 days

Markos observed the image of the moon above. He is curious to know what the moon looked like several nights before. Which best describes the shape of the moon that occurred BEFORE Markos observed the moon phase below?

• The moon looked exactly the same.

• The moon was a full moon (brightly lit circle).

• The moon was more than half lit on the right side.

• The moon was less than half lit on the right side.

Which movement creates day/night?

• rotation
• revolution

Which movement creates years?

• rotation
• revolution