1) the amount of energy it takes to raise the temperature of 1kg of water by 1 degree celsius a) urine b) nephrons c) kidney d) calorie 2) a large molecule that is made of amino acids and contains carbon, hydrogen, oxygen, nitrogen and sometimes sulfur a) protein b) enzymes c) bladder d) villi 3) molecules mad of carbon, hydrogen, and oxygen atoms and are usually the body's major source of energy a) minerals b) kidney c) bladder d) carbohydrates 4) also called lipids, provide energy and help your body absorb vitamins a) mechanical digestion b) calorie c) fats d) kidney 5) nutrients that are needed in small amounts for growth, regulation of body functions and prevention of disease a) vitamins b) digestion c) urethra d) bladder 6) inorganic nutrients-nutrients that do not contain carbon- that help the body regulate many chemical reactions a) ureter b) minerals c) bladder d) fats 7) the mechanical and chemical breakdown of food into small particles and molecules that your body can absorb and use a) digestion b) kidney c) urethra d) fats 8) food is physically broken into smaller pieces a) chemical digestion b) excretory system c) mechanical digestion d) peristalsis 9) chemical reactions break down pieces of food into small molecules a) enzymes b) chemical digestion c) excretory system d) urethra 10) proteins that help break down larger molecules into smaller molecules. they also speed up the rate of a reaction a) enzymes b) minerals c) vitamins d) chemical digestion 11) muscular tube that connects the mouth to the stomach a) vitamins b) esophagus c) villi d) urethra 12) wave-like muscle contraction through which substances move through the digestive tract a) urethra b) fats c) peristalsis d) enzymes 13) a thin, watery liquid formed when food mixes with gastric juices in the stomach a) enzymes b) villi c) chyme d) calorie 14) fingerlike projections that cover the folds of the small intestine a) carbohydrates b) fats c) villi d) chemical digestion 15) collects and eliminates wastes from the body abd regulates the level of fluid in the body a) excretory system b) mechanical digestion c) minerals d) bladder 16) bean-shaped organ that filters, or removes, wastes from blood a) kidney b) chemical digestion c) villi d) mechanical digestion 17) networks of capillaries and small tubes, where filtration of blood occurs a) calorie b) protein c) nephrons d) chemical digestion 18) fluid produces when blood is filtered a) urine b) esophagus c) carbohydrates d) digestion 19) tube through which urine leaves the kidney a) mechanical digestion b) ureter c) enzymes d) urethra 20) muscular sac that holds urine until it is excreted a) fats b) ureter c) bladder d) chyme 21) tube through which urine exits the body a) mechanical digestion b) bladder c) urethra d) villi

Grade 8 chapter 6

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