Module 1 & 2 Review

Earth’s four main systems are completely separate of each other.

• True
• False

Astronomers study Earth, its neighbors, and other matter in the universe.

• True
• False

Earth’s atmosphere contains about 78 percent carbon dioxide.

• True
• False

The biosphere includes all organisms that live within a few meters of Earth’s surface, at the bottom of oceans, and on the tops of mountains.

• True
• False

Complete the following statement using the given terms. "The number of protons in an atom's nucleus is the ."

• atomic number
• isotope
• radioactive decay

An atom that gains or loses an electron and has an electric charge is called a(n):

• atomic mass
• isotope
• ion
• mass number

The basic building blocks of matter are:

• molecules
• atoms
• compounds
• elements

Complete the following statement using the given terms. "When atoms of the same element have different numbers of neutrons they are know as of that element ."

• atomic number
• isotope
• radioactive decay

The nucleus of an atom is made up of:

• protons and neutrons
• protons and electrons
• neutrons and electrons
• Option 4

The branch of Earth science that studies the blanket of air that surrounds Earth is .

• meteorology
• paleontology
• astronomy
• oceanography