7. Look at the table below and answer the questions that follow. The table shows the composition of the atmosphere for Venus, Earth and Mars:
% of Venus’s atmosphere
Carbon dioxide (CO2 Nitrogen (N)
Oxygen (O2 Argon (Ar)
) Methane (CH4 ) )
96.5 3.5
Trace 0.007 0
a. List the elements present in the list above. b. What compounds are present in the atmospheres?
c. Which gas do you think makes it impossible for life to exist on Venus and Mars? Explain your answer.
% of Earth’s atmosphere
0.03 78 21
0.9 0.002
% of Mars’s atmosphere
95 2.7
0.13 1.6 0
Past paper questions 1. Final Examination 2019, Question 10
Answer questions a. and b. by placing a tick () in the correct box. a. A star and all of the objects that orbit it is called a Moon
Solar system Galaxy
b. A system of billions of stars is called a Moon
Solar system Galaxy
2. Final Examination 2022, Question 2 The images below show three celestial objects found in our solar system. The objects are not shown on the same scale.