Astronomy 3: What Causes Days and Years?

Earth rotates on its imaginary _____ .

• line

• equator

• axis

• core

Earth makes one complete revolution every _______ .

• 1 day

• 365 days

• 24 hours

• 365.25 days

Earth completes one rotation every _________ .

• 24 hours

• 15 hours

• 365 days

• hour

Earth has ___________ time zones.

• 12
• 6
• 24
• 1

The mainland/continental U.S. has ______ time zones.

• 3

• 6

• 4

• 24

The imaginary line passing through the Pacific Ocean where a new day begins is called the ____________ .

• Equator
• International Date Line
• Tropic of Cancer
• Tropic of Capriicorn

How many times does Earth rotate in one year?

• 365.25

• 27.3

• 1

• 29.5

What causes day and night cycles?

• Earth's revolution
• Earth's axial tilt
• Earth's rotation
• the Moon's shadow

How often does Leap Day occur?

• every year
• every 2 years
• every 4 years
• every 100 years

In which direction does Earth rotate?

• clockwise
• counterclockwise