PRELIM EXAMINATION: Earth and Life Science

It was found out that Earth’s surface is covered with water. Approximately, how many percent of water comprises the Earth?

• 45% water

• 50% water

• 60% water

• 70% water

Which statements best define planet Earth?

• It has gases.

• It supports life.

• It has rocky core.

• It supports other planet.

Earth contains all living organisms including those on the land, in the water and air. Which subsystem best describes the statement?

• biosphere

• atmosphere

• hydrosphere

• geosphere

What makes planet Earth habitable?

• It has comfortable distance from the sun.

• It has atmosphere that protects from radiation.

• The atmosphere holds carbon dioxide and other gases.

• All of the above

From the given choices, which is an example of a connection between the biosphere and the atmosphere?

• Animals eat plants.

• Animals drink water.

• Animals lie in caves.

• Plants produce oxygen.

Which statement about the Earth’s energy in sustaining life is incorrect?

• Earth survives in too little energy.

• Earth is in the right distance from the sun

• Earth is kept warm by an insulating atmosphere.

• Earth has magnetic field to protect from solar radiation.

Which subsystem suits the statement, “Global ecological system interacting with each other”?

• biosphere

• hydrosphere

• geosphere

• atmosphere

What are the building blocks of rocks, and it is mostly found in the geosphere?

• minerals

• ore

• soil

• elements

Petrologist classifies rocks based on how they were formed. What is the branch that deals with the study of rocks?

• Biology

• Paleontology

• Geology

• Petrology

Which of the following is the outermost layer of the Earth?

• core

• crust

• discontinuity

• mantle