According to the second passage, which of the following is not a farfetched theory of the Tunguska explosion? A. Earth was attacked by an alien weapon. B. Tunguska is evidence of time travel. C. A piece of a comet exploded. D. Tesla conducted a failed test of an energy weapon. E. An antimatter annihilation caused the detonation.

What evidence shows that Djenne-Djeno was a major trading city in West Africa?

According to the second passage, which of the following would be categorized as low-probability natural phenomenon? A. the explosion of an energy weapon B. lightning coming from the earth C. a fire D. a meteorite E. an alien torpedo strike

What of the following best describes the purpose of the second passage? A. disprove alternative theories of the Tunguska explosion B. inform readers about new evidence in the Tunguska mystery C. respond to the author of the first passage D. support the theory that an asteroid or comet caused the Tunguska event E. inform readers of the Tunguska event

According to the first passage, where was the object when it exploded? A. approximately 300 feet underground B. in the upper atmosphere C. in the air, over the forest D. between two large clouds E. on the forest floor

Why, according to the first passage, must humans develop technology? A. to defend the planet from extraterrestrial threats B. to better understand the properties of antimatter C. so that civilization can colonize other planets if necessary D. to make contact with the aliens who attacked Siberia E. to prepare for the transition to living in the mines

The overall tone of the first passage is best described as A. concerned. B. optimistic. C. dolorous. D. apologetic. E. timid.

A maths exam is marked out of 120. Draw a conversion graph to change the following marks to percentages. a) 80, b) 110, c) 54, d) 72.

Which best paraphrases the following quotation? (lines 59-61) "...my own feeling is that a man does good work chiefly when he is in something which he intends to make his permanent work, and in which he is deeply interested." A. People who do not choose the right career just have to learn to deal with it. B. Decide what you want to do before committing your life to a career. C. Choose your career based on what you want to do for the rest of your life. D. People do their best work when they love what they are doing. E. Choosing a career path should depend on how much glory you need.

Choose the best answer. Which challenge is unique to environmental science? I. lack of baseline data II. sample size III. objectivity (a) I (b) II (c) III (d) I and II

Solve the following pairs of simultaneous equations graphically: a) $x+y=4 \\ x - y = 0$ b) $3 x+y=2 \\ x-y=2$ c) $y+4x+4=0 \\ x + y = 2$ d) $x - y = -2 \\ 3x + 2y + 6 = 0$

In the image above, between which points is the bus moving at constant speed?

A 2 and 4

B 2 and 6

C 3 and 5

D 3 and 6

Draw a distance-time graph for the first 10 seconds of an object travelling at 5 m/s. Use your graph to estimate: a) the time taken to travel 25 m, b) how far the object travels in 3.5 seconds.

Convert the following decimals to percentages: a) 0.31, b) 0.67, c) 0.09, d) 0.05, e) 0.2, f) 0.75.