5th grade review

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Across
  1. 2. any organism or microscopic organism that feeds on&breaks down matter from once living organisms into particles
  2. 4. organism that lives on living or once living organisms
  3. 7. Anything that takes up space and can be measured by its weight (or mass)
  4. 9. chain, a sequence of organisms that eat each other, showing how matter and energy move in a natural system
  5. 10. an organism that gets matter and energy by eating other organisms
  6. 11. the natural environment that helps organisms live, grow and survive.
Down
  1. 1. loose material that covers the ground made of rock particles, organic matter, air and water
  2. 3. Log, a fallen tree that helps other things live and grow
  3. 5. A type of matter made of particles that are moving freely in space
  4. 6. a tiny piece of matter that is too small to be seen with our eyes
  5. 8. a living organism that produces its own food, usually using matter from air/ water and by transferring energy from the sun.