Question 2 (1 mark) Learning goal 1: The raw materials for making plastics are usually
obtained from crude oil. What is the main step needed to turn these
raw materials into plastics?
Breaking long chain-like molecules into small units
Mixing small molecules together
Burning the oil to produce heat and gas molecules
Joining small molecules together to form long chains

joining small molecules together to form long chains

Explanation:

plastics are actually polymer which is made by joining small units know as monomer. for e.g butene ethanol

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.