1. Which quantity is measured in watts?
Physics
  1. energy
  2. force
  3. power
  4. current
2. Which gas is released in photosynthesis?
Biology
  1. oxygen
  2. carbon dioxide
  3. nitrogen
  4. hydrogen
3. Heat transfer through direct contact in solids is ___.
Physics
  1. convection
  2. radiation
  3. evaporation
  4. conduction
4. The green pigment in plants that traps light is ___.
Biology
  1. haemoglobin
  2. melanin
  3. chlorophyll
  4. keratin
5. Acid + base → salt + ___.
Chemistry
  1. oxygen
  2. hydrogen
  3. water
  4. carbon
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