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6. what is the diameter of the earth?

  • about 12800km
  • about 1280km
  • about 128000km
  • about 128km

7. what was the miller urey experiment called?

  • primordial soup
  • the miller urey experiment
  • chemical soup

8. Why is the earths crust and upper mantle cracking?

  • because of sea levels rising
  • because of tectonic plates which are constantly moving
  • because of volcanoes erupting

9. How are elements arranged in the periodic table?

  • in order of their atomic numbers
  • in size order
  • in the popularity

10. the mantle is ...?

  • almost solid but parts of it can flow very slowly
  • almost solid but most of it a liquid

11. What is the middle layer of the earth?

  • crust
  • core
  • mantle

12. what did the miller urey experiment consist of?

  • hydrocarbons and ammonia with lightning providing energy
  • ammonia and carbondioxide with lightning providing sparks

13. what surrounds the earth?

  • the crust
  • the air
  • the atmosphere
  • the sky

14. neutrons have ..... charge

  • no charge
  • positive charge
  • negative charge
  • some charges

15. Group 0 consists of the ... gases?

  • fluids
  • hot gases
  • noble gases
  • metals

16. why do the tectonic plates move?

  • because of global warming
  • becasue of convection currents in the mantle that are caused by radioactive decay
  • because of the world heating up

17. There are about .... different elements from which all substances are made?

  • 60
  • 2000
  • 100
  • 50

18. where do earthquakes occur?

  • where tectonic plates part
  • where tectonic plates meet
  • where tectonic plates crash
  • where tectonic plate overlap

19. the atomic number is the amount of...?

  • proton number
  • electron number

20. what is the nucleus made of?

  • protons and neutrons
  • electrons and protons
  • just protons
  • just electrons