Year 4 Digestive System and Teeth Worksheet - Intermediate

Year 4 Digestive System and Teeth worksheet for Year 4 (Key Stage 2 / Year 3-6 (Ages 7-11)). Intermediate level science practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Science•Key Stage 2 / Year 3-6 (Ages 7-11)•Human Bodyintermediate

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Inside the Body: Digestion, Teeth and Food Chains

Year 4 Science | Ages 8–9 | Intermediate

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Instructions: Work through each activity carefully and use the information in the questions to help you. Write one clear answer in each box; explain your thinking where asked. Check that your answers use the correct scientific words.

The Journey of Food

Put the digestive system parts in the order that food travels through them. Use each part once. Write the numbers 1–5 beside the parts, then answer the final question.

Mouth

Stomach

Large intestine

Oesophagus

Small intestine

6. Which part moves food from the mouth to the stomach?

What Does Each Part Do?

Choose the correct body part from the word bank for each description. Use every answer you need from the bank; some parts may be used more than once. Read each description carefully before writing.

Word bank: mouth, oesophagus, stomach, small intestine, large intestine

1. Food is chewed and mixed with saliva here.

2. Muscles squeeze food down this tube.

3. Food is churned and mixed with digestive juices here.

4. Most nutrients from digested food pass into the blood here.

5. Water is absorbed from the remaining undigested food here.

Teeth with Different Jobs

Use the word bank to identify the type of tooth described. Think about the shape of each tooth and the job it does when eating. Write one tooth type in each box.

Word bank: incisors, canines, premolars, molars

1. These front teeth cut and bite food.

2. These pointed teeth help tear food.

3. These broad teeth help crush and grind food.

4. Which tooth type is especially useful for biting into an apple?

5. Which tooth type is especially useful for grinding a mouthful of food?

Follow the Food Chain

Use the food chain in each question to work out what eats what. The arrow means “is eaten by”. Answer using the organisms named in the question, and remember that plants make their own food.

1. grass → rabbit → fox. Which organism is eaten by the rabbit?

2. leaves → caterpillar → blue tit. What does the blue tit eat?

3. grain → mouse → owl. Which organism is the producer?

4. algae → small fish → heron. Which organism is the predator that eats the small fish?

5. clover → grasshopper → frog. Which organism is the prey of the frog?

Science Check: Explain Your Thinking

Answer each question in a complete sentence where possible. Use what you know about digestion, teeth and food chains. For the last question, include the producer and the consumer in your answer.

1. Why does food need to be broken down during digestion?

2. How does saliva help when food is in your mouth?

3. Why are molars shaped differently from incisors?

4. In the food chain wheat → vole → kestrel, which organism gets energy directly from the wheat?

5. What might happen to the number of kestrels if there were fewer voles to eat?

Answer Key

Activity 1: Mouth 1 ; Oesophagus 2 ; Stomach 3 ; Small intestine 4 ; Large intestine 5 ; Oesophagus

Activity 2: Mouth ; Oesophagus ; Stomach ; Small intestine ; Large intestine

Activity 3: Incisors ; Canines ; Premolars or molars ; Incisors ; Premolars or molars

Activity 4: Grass ; Small fish ; Grain ; Heron ; Grasshopper

Activity 5: Digestion breaks food into smaller substances that the body can absorb and use ; Saliva moistens food and begins breaking it down ; Molars are broad and help grind food, while incisors are sharp-edged and help cut or bite food ; Vole ; The number of kestrels may decrease because less food is available.