Earth's Unique Features and Life

What makes Earth special compared to other planets?

• It is the biggest planet.

• It has many moons.

• It is the only known planet that supports life.

• It is the fastest spinning planet.

Why is Earth's distance from the sun important for life?

• It makes Earth very hot.

• It makes Earth very cold.

• It is just right, not too hot or too cold.

• It helps Earth spin faster.

What important thing does Earth's perfect distance from the sun allow to exist on its surface?

• Solid rock

• Liquid water

• Hot gases

• Frozen ice

About how much of Earth's surface is covered by water?

• About 25%

• About 50%

• About 71%

• About 90%

What two main gases make up most of Earth's atmosphere?

• Carbon Dioxide and Methane

• Nitrogen and Oxygen

• Hydrogen and Helium

• Water Vapor and Argon

How is oxygen, which is important for life, mainly produced on Earth?

• By volcanoes erupting.

• By plants through photosynthesis.

• By melting ice caps.

• By lightning strikes.

What does Earth's magnetic field protect the planet from?

• Strong winds

• Harmful solar radiation

• Falling asteroids

• Too much rain

What makes Earth's magnetic shield special among rocky planets in our solar system?

• It is the strongest.

• It is the only one that changes color.

• It is unique.

• It is the smallest.

What kind of geological activity happens because Earth has active plate tectonics?

• Only strong winds.

• Only big floods.

• Earthquakes, mountain building, and volcanism.

• Only changes in ocean tides.

How does Earth's geological activity help life thrive?

• It makes the planet spin faster.

• It creates more sunlight.

• It distributes heat and chemicals, creating diverse environments.

• It makes the oceans deeper.