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5 Written questions

5 Matching questions

  1. atomic number
  2. hydrocarbons
  3. prokaryotes
  4. lithosphere
  5. ions
  1. a Electrically charged atoms
  2. b Contains the rock sediment beneath our feet, in the planet's uppermost layers
  3. c Single-celled organisms lacking organelles and a nucleus
    Bacteria and archaea
  4. d Atoms of each element that have a defined number of protons
  5. e Contain only carbon and hydrogen, Make up fossil fuels,
    The simplest hydrocarbon is methane (natural gas),
    Can be a gas, liquid, or solid

5 Multiple choice questions

  1. Release of water vapor by plants
  2. Energy can change forms, but cannot be created or destroyed
  3. Tiny animals that consume phytoplankton
  4. Consist of carbon atoms joined by bonds with hydrogen and may consist of other elements
  5. A fundamental type of matter, a chemical substance with a set of properties, which cannot be broken down into substances with other properties, There are 92 in nature and more than 20 others that have been artificially created

5 True/False questions

  1. photosynthesisThe process of turning light energy from the sun into chemical energy Carbon dioxide + water + sun's energy is converted into sugars and high-quality energy.
    Low-quality energy is turned into high-quality energy.


  2. poolsPositively charged particles


  3. macromoleculesDescribes the routes that carbon atoms take through the environment


  4. matterAll material in the universe that has mass and occupies space


  5. enzymesMolecules that promote chemical reactions