Other questions in this quiz

2. The atomic number of an element is equal to the number of ...?

  • protons in the nucleus
  • protons in the nucleus of its atoms
  • electrons around the atom

3. what did the miller urey experiment consist of?

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

4. what is the diameter of the earth?

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

5. What is the middle layer of the earth?

  • core
  • mantle
  • crust

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