1) Why do you sweat? a) I sweat to cool down my body when it's hot. b) I sweat in the cold. 2) What is this system called? a) Excretory system b) Respiratory system 3) The excretory system is a group of_______? a) Organs b) Bones 4) The excretory system helps eliminates _____ from the body. a) Waste b) Air 5) The kidneys remove waste from the blood a) True b) False. 6) The waste combines with water to make _______ a) Urine b) poo 7) The urine passes to the ______ where it's stored. a) Bladder  b) Stomach 8) The urine leaves to body through the U_____A a) Urethra b) Anus 9) How many kidneys do you have? a) 2 b) 1 10) Spell it. K_____S. a) KIDNEYS b) KDINEYS 11) Spell it. E________y S_____M. a) EXCRETORY SYSTEM b) I don't know 12) Is sweat a liquid waste or a solid waste? a) Sweat is a liquid waste. b) It's a solid waste.

Cambridge Science Skills 3. Unit:2 Why do you sweat?

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