Science Quiz ChallengeOnline version Test your knowledge of science with these fun and challenging questions! by Racy Muthoni 1 Digestion starts in the? a stomach b Ileum c mouth d colon 2 Which one of the following is not a part of the digestive system? a mouth b lungs c stomach d ileum 3 Which cloud indicates heavy rain? a nimbus clouds b cumulus clouds c cirrus clouds d stratus clouds 4 Removal of undigested food through the anus is known as? a egestion b digestion c absorption d congestion 5 Which one is not a characteristics of plants as living things? a they locomote b they die c they reproduce d they breathe 6 What is the process by which plants make their food? a Respiration b Photosynthesis c Fermentation d Transpiration 7 What is the smallest unit of life? a Atom b Tissue c Molecule d Cell 8 What is the main gas that plants absorb from the atmosphere? a Carbon Dioxide b Nitrogen c Methane d Oxygen 9 What is the hardest natural substance on Earth? a Iron b Diamond c Quartz d Gold 10 What is the scientific study of behavior and mental processes? a Psychology b Anthropology c Sociology d Biology 11 What is the primary function of the stomach? a To absorb nutrients. b To break down food using acids and enzymes. c To produce insulin. d To store bile. 12 Which organ is responsible for nutrient absorption? a Stomach. b Pancreas. c Small intestine. d Large intestine. 13 What enzyme begins the digestion of carbohydrates? a Trypsin. b Amylase. c Lipase. d Pepsin. 14 What is the role of bile in digestion? a To digest proteins. b To emulsify fats. c To neutralize stomach acid. d To absorb vitamins. 15 Where does the digestion of proteins primarily occur? a In the mouth. b In the stomach. c In the esophagus. d In the small intestine. 16 What part of the digestive system is responsible for water absorption? a Stomach. b Pancreas. c Small intestine. d Large intestine. 17 Which organ produces digestive enzymes and hormones? a Gallbladder. b Stomach. c Liver. d Pancreas. 18 What is the main function of the esophagus? a To produce bile. b To transport food to the stomach. c To digest food. d To absorb nutrients. 19 What is the first part of the small intestine called? a Ileum. b Duodenum. c Jejunum. d Cecum. 20 What is the term for the rhythmic contractions that move food through the digestive tract? a Digestion. b Absorption. c Peristalsis. d Segmentation.
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