Natural Sciences

1234567891011
Across
  1. 2. Gas essential for respiration
  2. 7. Organ system responsible for transporting blood
  3. 9. Green pigment in plants that absorbs sunlight
  4. 10. Type of circuit where current has only one path
  5. 11. Natural satellite of Earth
Down
  1. 1. The nearest star to Earth
  2. 3. The pull of the Earth on objects
  3. 4. The planet known as the 'Red Planet'
  4. 5. Change of state from liquid to gas
  5. 6. Simplest form of matter, made up of protons, neutrons and electrons
  6. 7. Non-renewable fossil fuel formed from ancient plants
  7. 8. Smallest unit of life