Earth and Its Subsystems Quiz

Which of the following planets can sustain growth and life?

• Earth

• Jupiter

• Mars

• Saturn

The Earth's surface is discovered to be covered with water. Approximately, how many percent of water comprises the Earth?

• 30% water

• 50% water

• 60% water

• 70% water

Which of the following gases is the most abundant in Earth's atmosphere?

• Carbon dioxide

• Hydrogen

• Nitrogen

• Oxygen

The role of soil is important for the growth and life on Earth. Which of the following is TRUE?

• They do not affect life and growth on Earth.

• There is no relationship between the soil and vegetation.

• The soil provides nutrients, water, and substrate for vegetation.

• The soil allows growth of different types of plants but not microorganisms.

Which of the following statement is NOT true about the hydrosphere?

• It is also a way for transportation.

• It serves as thermostat and heat reservoir, especially the ocean.

• Half of the Earth's surface is composed of the oceans and the seas.

• All the water on our planet which also includes vapor and ice comprised the hydrosphere.

When dead plants and animals decay, carbon is returned to the soil. This flow of energy and matter occurs in what system?

• Biosphere and lithosphere

• Biosphere and atmosphere

• Atmosphere and lithosphere

• Atmosphere and hydrosphere

Which is an example of a connection between biosphere connecting to hydrosphere?

• Plants produce oxygen.

• Plants need sunlight to grow.

• Animals drink water from springs and streams.

• Animals eat plants in the lush green vegetation.

Which of the following is NOT included in the Earth's subsystems?

• Atmosphere

• Hydrosphere

• Lithosphere

• Photosphere

Which of the following is NOT true about the earth's atmosphere?

• The earth's atmosphere protects us from the sun's radiation.

• It contains the ozone layer that absorbs the ultraviolet wavelengths.

• The atmosphere only consists of nitrogen, carbon dioxide, oxygen, and argon.

• Thirty percent of the radiation is reflected away by the atmosphere, clouds and earth's surface.

How do oxygen and carbon dioxide make the earth habitable?

• Carbon dioxide and oxygen lead to maintenance of heat on Earth

• Carbon dioxide and oxygen help prevent the entry of UV radiation.

• Carbon dioxide and oxygen is used by photosynthetic organisms and by our cells to function.

• Carbon dioxide is used by photosynthetic organisms in photosynthesis, and the oxygen is used by humans and animals for respiration.