1) How does the mouth break down food? Select 2 answers. a) The teeth chew and cut food into smaller pieces. b) The tongue well-mixes the food. c) Saliva has digestive juice that helps digest the food. d) Our mouth helps us to tase the food. 2) Why do humans need to eat food? a) Humans need to eat and digest food. b) Food is delicious. c) Food provides humans with energy and essential minerals to survive and grow.  d) Food is good for our body. 3) What food group is this? a) Proteins b) Fibre c) Carbohydrates d) Fats 4) What food group is this? a) Proteins b) Vitamins c) Fibre d) Carbohydrates 5) What mineral keeps our blood healthy? a) Protein b) Calcium c) Iron d) Fat 6) What helps food pass through our digestive system easily? a) Carbohydrate b) Fibre c) Protein d) Fat 7) What mineral is good for our bones and teeth? a) Vitamin b) Enzyme c) Iron d) Calcium 8) If I want to grow my muscles, what sort of food should I eat more? a) Pasta b) Chicken c) Broccoli d) Cheese e) Banana f) Rice 9) If I have not pooped for a few days, what kind of nutrient do I need to take in more? a) Fibre b) Carbohydrate c) Protein d) Calcium 10) What is a balanced diet? a) We must eat what our body lacks of b) We eat lots of vegetables and stay away from red meat c) We must eat lots of carbohydrates to get more energy. d) We must eat the right kind of food with the right amount. 11) To test how fast a slice of apple turns brown, we cut an apple into pieces and put them in 5 different zipped bags. We then pour different liquids into each bag. What is the control variable in this experiment? a) How fast the apple becomes brown b) The same type of apple and the amount of liquid c) The liquids 12) To test how fast a slice of apple turns brown, we cut an apple into pieces and put them in 5 different zipped bags. We then pour different liquids into each bag. What is the independent variable in this experiment? a) How fast the apple becomes brown b) The same type of apple and the amount of liquid c) The liquids 13) To test how fast a slice of apple turns brown, we cut an apple into pieces and put them in 5 different zipped bags. We then pour different liquids into each bag. What is the dependent variable in this experiment? a) How fast the apple becomes brown b) The same type of apple and the amount of liquid c) The liquids

Grade 4 Science Unit 4 Digestive system

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