Howardites

The answer sheet for the worksheet Three kinds of meteorite. Each answer comes with the reason, so it can be used to mark or to go over the questions with the class.

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Start here: Beginner · Ages 7 and upAnswer sheet for teachers

Answers: Three kinds of meteorite

  1. C: When asteroids smashed into each otherMesosiderites probably formed in asteroid crashes; it is pallasites that formed where metal met rock inside an asteroid.
  2. B: The iron feels far heavierIron meteorites are very heavy for their size, nearly three times heavier than a normal rock of the same size.
  3. B: Stony, iron, stony-ironStony meteorites are mostly rock, irons are mostly metal, and stony-irons are a mixture of both.
  4. D: A jumble of broken rock and metal stuck togetherMesosiderites look like a jumble of broken rock and metal stuck together.
  5. False: the right answer is Stony-ironStony-irons are the rarest family, only about 1 in every 100 falls.
  6. False: the right answer is Stony-ironStony-iron meteorites are a mixture of roughly equal amounts of metal and stone.
  7. Crashes broke the asteroids apart (accept any answer with the same meaning)Later crashes broke the melted asteroids apart and exposed their metal cores.
  8. The asteroid melted and the heavy metal sank (accept any answer with the same meaning)When these asteroids melted, the heavy metal sank to the middle, just as it did inside Earth.

Task

Answers will vary. The task comes from the lesson: Find a pebble and a metal object, such as a large bolt or a key, of a similar size. Hold one in each hand. Can you feel which is heavier? Iron meteorites feel heavy in the same way.

Look for work that uses the key words correctly and gives a reason for each point.

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