1) When did the asteroid hit the Earth? a) 6 million years ago b) 60 million years ago c) 66 million years ago 2) How fast was the asteroid moving? a) 18 km/h b) 18 km/m c) 18 km/s 3) Where did the asteroid hit the Earth? a) in northeastern Mexico b) in the Gulf of Mexico c) just north of Mexico 4) What was the effect of the asteroid impact? a) Three quarters of all dinosaurs died. b) All of the animals on the Earth died. c) 75% of all animal and plant life died. 5) What surprised the researcher about the impact site? a) Life quickly recovered in the area. b) The crater that formed was very deep. c) A lot of gas was released after the impact. 6) How much energy was released by the impact? a) the equivalent of the nuclear bomb dropped on Hiroshima b) the equivalent of 10 nuclear bombs dropped on Hiroshima c) the equivalent of 10 billion nuclear bombs dropped on Hiroshima 7) How does the scientist describe the crater? a) It was surprisingly shallow. b) It was quite deep. c) It was not very wide. 8) What happened to the sediments around the impact site? a) They released a lot of gas. b) They were destroyed. c) They were injected into the Earth's atmosphere. 9) What effect did the release of Sulphur have on the Earth? a) It created numerous fires around the Earth. b) It increased the temperature of the Earth. c) It reduced the temperature of the Earth. 10) How long did this effect last? a) a few months b) less than 20 years c) hundreds of years 11) What inhibited photosynthesis? a) the release of Sulphur b) dust and soot in the atmosphere c) the freezing temperatures 12) What effect did the inhibited photosynthesis have? a) It had a negative impact on the food chain. b) It had a positive impact on the food chain. c) It had no impact on the food chain.

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