All energy is eventually converted into heat. 6. Organisms are not closed systems because they use two things, which are: (2 marks) Organisms use energy and matter from outside sources which is why they are not closed systems. 7. The producers in a food chain are called what? (1 mark) The producers in a food chain are called autotrophs.
8. Give an example of potential energy. (1 mark) An example of potential energy is a coiled spring. 9. Give an example of kinetic energy. (1 mark) An example of kinetic energy is a car travelling. 10. Energy arrives from the sun , passes through autotrophs , and dissipates into the environment and the universe , as heat. (4 marks) 11. Nutrients are passed from one organism to another in closed loops called biochemical cycles. (1 mark) 12. Give the definition for: catabolism. (1 mark) Catabolism releases energy from the bonds which are holding the atoms of large molecules together. 13. Give the definition for: anabolism. (1 mark) Anabolism requires energy to create new bonds of atoms within larger molecules. 14. Give the definition for: metabolism. (1 mark) Metabolism is the totality of chemical reactions in a cell or organism. It includes both catabolism and anabolism. 15. Give the definition for: chemical reaction. (1 mark) A chemical reaction is the alteration of one or more substances to create new substances by reorganization. 16. Give the definition for: bond energy. (1 mark) Bond energy is the energy required to break a chemical bond. 17. Catabolizing + Anabolizing = metabolizing (1 mark)
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- Summer '17