Chapter 2: Planet Earth

What type of energy drives life on Earth?

• Geothermal energy
• Solar energy
• Wind energy
• Nuclear energy

What is Earth's daily spin on its axis called?

• Tilt
• Orbit
• Rotation
• Revolution

What term describes Earth's annual orbit around the sun?

• revolution
• rotation
• ellipse
• year

What imaginary lines measure Earth's distance from the equator?

• Equatorial lines
• Lines of longitude
• Tropic lines
• Lines of latitude

Which area receives consistent sunlight year-round?

• Polar regions
• Desert areas
• Tropic regions

• Temperate zones

How long does one complete Earth rotation take?

• 36 hours
• 12 hours
• 24 hours
• 48 hours

How many days does Earth take to orbit the sun?

• 366 days
• 365 days
• 360 days
• 365.25 days

What causes the variation in Earth's seasons?

• The rotation of the Earth on its axis.
• The gravitational pull of the stars.
• The tilt of the Earth's axis and its orbit around the Sun.
• The distance from the Earth to the Moon.

What percent of Earth's water is saline (salt water)?

• 85%
• 97.5%
• 50%
• 75%

What type of water is essential for human consumption?

• Rainwater
• Distilled water
• Freshwater

• Saltwater