1) Why does the brain need glucose ? a) So that the brain changes colors to coral color. b) Glucose is what the brain gets energy from. c) So flat the eyes can see well. d) To keep warm in winter. e) Glucose helps to improve the skin. f) Glucose works well for teeth. 2) What can you do to train your brain? a) Sleep for a very long time. b) Work hard from morning to evening. c) Hold your breath for more than 2 minutes. d) Do cardio workouts. e) Cook delicious food f) You can do activities such as crossword puzzles and computer games.  3) What effect can tiredness have on the brain? a) A person wants to eat a lot. b) A person becomes energetic. c) A person hangs on fhe phone more. d) Tiredness can make it difficult for you to concentrate during the day. e) A person does not want to sleep. f) Tiredness leads to ear pain.

Ex 2 Science

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