Midterm Examination in Earth Sciences

The universe expansion occurred about how many years ago?

• 100 years

• 100 billion years

• 10 billion years

• 1 million years

A system which is made up of the sun and the heavenly bodies that move around it is known as ____.

• Lunar

• Space

• Solar system

• galaxy

Heavenly bodies which revolve around the sun are called;

• orbits

• stars

• planets

• galaxies

Which among the planet is not a gas giant?

• Venus

• Neptune

• Saturn

• Uranus

The thinnest layer of the earth is the________.

• crust

• mantle

• inner core

• outer core

All living organisms of the earth, including those on the land, water and air, are considered part of which subsystem?

• biosphere

• hydrosphere

• atmosphere

• geosphere

Which of the following is NOT one of the four major geological subsystems of the earth?

• biosphere

• water sphere

• atmosphere

• geosphere

The crust of the earth consists mostly of

• oxygen and silicon

• iron and nickel

• iron and silicon

• copper and nickel

What is lithosphere?

• The bottom of the mantle

• The crust and the top of the mantle

• The middle of the mantle

• Just the top of the crust

The largest portion of the earth's volume is____

• crust

• mantle

• the inner core

• the outer core