Digestion, breathing and clean habitats
Answers are for parents and teachers.
1
Draw the path of food from the mouth to the end of the digestive system and name each part.
Mouth, food pipe, stomach, small intestine, large intestine, then waste leaves.
2
Explain to someone at home why we chew food well. Use the words saliva and stomach.
Chewing makes pieces small and wet them with saliva, so the stomach can mix them with juices more easily.
3
Write the path of air from your nose to your blood in four short steps.
Nose, windpipe, branching tubes, lungs, where oxygen enters the blood.
4
Write one thing you will do this week to keep a river, canal or street clean.
Answers differ, for example: carry my rubbish to a bin.
5
Write a claim, evidence and reasoning about this sentence: “Frogs need clean water.”
Claim: Frogs need clean water. Evidence: they take in things through their skin and ponds with dirty water have few frogs. Reasoning: pollution gets into the frog’s body.