1. Directions

You will read passages on the topic and then answer questions about them. You may find vocabulary at the end of the test. Read the questions carefully before choosing the correct answers.

2. Questions of the test

Question 1. How many planets orbit the Sun in the solar system?
A) 5
B) 6
C) 7
D) 8

Question 2. Which of the following is NOT a characteristic of Earth that allows life to exist?
A) Water on its surface
B) Oxygen gas in its air
C) The perfect range of temperatures
D) A thin, rocky outer layer

Question 3. What is the average temperature on Earth?
A) 10° C
B) 15° C
C) 20° C
D) 25° C

Question 4. How much of Earth's surface is covered by water?
A) 30 percent
B) 50 percent
C) 70 percent
D) 90 percent

Question 5. What is the atmosphere?
A) A layer of frozen water surrounding Earth
B) A layer of gases surrounding Earth
C) A layer of hot molten rock surrounding Earth
D) A layer of ice surrounding Earth