Variant 1 You could have come first and won the race if you … faster

19. Why are Venus studies important for scientists on Earth?

A) because our atmospheres are similar

B) because scientists want to test their equipment

C) because scientists want to predict agricultural problems on Earth.

D) because scientists want to trap less heat radiation on Earth.

20. According to the passage

A) The Venus studies are believed to be important to the understanding of possible adverse effects on the Earth’s fossil fuels

B) Venus’ atmosphere traps much less heat radiation than does the Earth’s because of its higher percentage of carbon dioxide.

C) Venus has a relatively thick atmosphere

D) The high surface temperature of Venus is due to an atmospheric greenhouse effect caused mainly by a blanket of carbon dioxide.