EARTH SCI CHAPTER 1

Which of the following subsystems covers 71% of Earth’s surface?

• Atmosphere

• Geosphere

• Hydrosphere

• Biosphere

Which subsystem includes all living organisms on Earth?

• Hydrosphere

• Geosphere

• Atmosphere

• Biosphere

What percentage of Earth’s atmosphere is composed of nitrogen?

• 21%

• 75%

• 78%

• 97%

Which of the following best describes the geosphere?

• The water component of Earth

• The gaseous layer surrounding Earth

• The solid, rocky part of Earth

• The layer where life exists

What role does the hydrosphere play in shaping Earth’s landforms?

• Protection from UV radiation

• Trapping sunlight and insulating heat

• Erosion and sedimentation

• Absorbing nutrients from the soil

Which layer of the atmosphere contains 75% of its gases?

• Troposphere

• Stratosphere

• Mesosphere

• Exosphere

Which subsystem is the largest of the four?

• Hydrosphere

• Geosphere

• Atmosphere

• Biosphere

What is the role of water in the atmosphere?

• Protect Earth from meteorites

• Trap sunlight, release precipitation, and act as a heat-insulating layer

• Provide nutrients for plants

• Facilitate the carbon cycle

Which subsystem is essential for producing weather and climate?

• Hydrosphere

• Geosphere

• Atmosphere

• Biosphere

Which of the following life forms thrive in extreme environments?

• Plants in tropical rainforests

• Bacteria near deep-sea vents

• Birds in the troposphere

• Fish in lakes