Chain Crosswords Medium Chain Science Hard — Set 16

Medium 13×13 Set 16
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8
Across
  1. 3. Two or more atoms joined together
  2. 5. The bending of light as it passes from one material to another
  3. 6. How often something happens in a given time
  4. 7. A tiny particle of light energy
  5. 8. A substance that living things need for energy and growth
Down
  1. 1. The process of making new living things
  2. 2. A glass container used in science experiments
  3. 4. A material that electricity or heat can pass through easily