Exploring Planetary Science Concepts

What are the four inner planets known for?

• Being large and gaseous

• Having rings

• Being small and dense with rocky surfaces

• Having many moons

What term is used to describe the inner planets?

• Gas giants

• Terrestrial planets

• Ice giants

• Dwarf planets

What are the main layers of Earth?

• Crust, atmosphere, and core

• Crust, mantle, and core

• Mantle, surface, and core

• Crust, surface, and atmosphere

What is unique about Earth in our solar system regarding water?

• It has the most water in the solar system.

• It has liquid water at its surface.

• It has no water at all.

• It has water only in gaseous form.

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

• Oxygen and carbon dioxide

• Nitrogen and oxygen

• Argon and nitrogen

• Carbon dioxide and argon

Which planet has a period of rotation closest to Earth's?

• Mercury

• Venus

• Mars

• Jupiter

What are Earth's three main layers?

• Crust, mantle, outer core

• Crust, mantle, inner core

• Crust, outer core, inner core

• Mantle, outer core, inner core

What is the smallest terrestrial planet and the planet closest to the sun?

• Venus

• Mars

• Mercury

• Earth

What is the primary composition of Mercury's interior?

• Ice

• Dense metal iron

• Water

• Gas

Which space probe provided much of the information about Mercury's surface?

• Voyager 1

• Mariner 10

• Galileo

• Cassini