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) Four
B) Six
C) Seven
D) Eight

Question 2. What is Neptune made up of mostly?
A) Water and ice
B) Rock and metal
C) Gases, mainly hydrogen and helium
D) Methane

Question 3. What causes Neptune to appear blue?
A) The reflection of the blue sky
B) The absorption of red light
C) The presence of water on its surface
D) A small amount of methane in its atmosphere

Question 4. What is Neptune's diameter compared to Earth's diameter?
A) Twice as small
B) About the same
C) Twice as large
D) Four times as large

Question 5. How long does it take for Neptune to complete one orbit around the Sun?
A) About one Earth year
B) About four Earth years
C) About 16 Earth years
D) About 165 Earth years