Year 4 Science Teeth and the digestive system: check-up and practice test questions

Method. Read the order of the parts.

1. Read the order. The mouth is the first part.
   mouth
2. Write the answer.
   Mouth

Check. Food enters at the mouth. ✓

Method. Read the table in section 5.2.

1. Read the table. The small intestine absorbs nutrients into the blood.
   nutrients
2. Write the answer.
   Small intestine

Check. Nutrients enter the blood here. ✓

Method. Read the table in section 5.2.

1. Read the table. The stomach churns the food and breaks it down.
   churns
2. Write the answer.
   Stomach

Check. The stomach mixes the food with juices. ✓

Method. Read the table in section 5.2.

1. Read the table. The rectum stores the waste.
   stores
2. Write the answer.
   Rectum

Check. The waste leaves at the anus. ✓

Method. Read the table in section 5.3.

1. Read the row. The incisors row says 8.
   8
2. Write the answer.
   8

Check. Incisors cut food. ✓

Method. Read the table in section 5.3.

1. Read the molars row. The molars row says 12, and they grind food.
   12 and grind
2. Check the job. Molars are large and flat, and grind food.
   grind food
3. Write the answer.
   12; grind food

Check. Check: 8 + 4 + 8 + 12 = 32. ✓

Method. Read the job column in section 5.3.

1. Read the job. Canines are pointed, and tear food.
   pointed
2. Write the answer.
   Canines

Check. Canines sit beside the incisors. ✓

Method. Think about the teeth of a lion.

1. Think about the teeth. Sharp canines tear meat, so the lion eats meat.
   tear meat
2. Write the answer.
   meat

Check. A lion is a carnivore. ✓

Method. Read the table in section 5.5.

1. Read the table. Brushing, drinking water and dentist check-ups help the teeth.
   healthy teeth
2. Write the answer.
   Accept any one of: brush twice a day; drink water; visit the dentist for check-ups.

Check. Any one of these habits helps. ✓

Method. Think about what a cow eats.

1. Think about the food. A cow eats grass and plants.
   grass
2. Write the reason. Flat molars grind plants, so the cow has them.
   grind
3. Write the answer.
   Accept any sentence that says a cow eats grass and plants, so it needs flat molars to grind them.

Check. Teeth match the food. ✓

Method. Read the order.

1. Read the order. Food enters the digestive system at the mouth.
   mouth
2. Write the answer.
   Mouth

Check. The mouth is at the start of the digestive system. ✓

Method. Find the tube between the mouth and the stomach.

1. Read the order. The oesophagus is the tube between the mouth and the stomach.
   oesophagus
2. Write the answer.
   Oesophagus

Check. The oesophagus is also called the gullet. ✓

Method. Read what each type of tooth does.

1. Read the types. The incisors at the front cut food.
   cut food
2. Write the answer.
   Incisors

Check. Incisors are the sharp front teeth. ✓

Method. Add the four types of tooth.

1. Add them. 8 plus 4 plus 8 plus 12 makes 32.
   8 + 4 + 8 + 12
2. Write the answer.
   32

Check. The total for an adult is 32. ✓

Method. Read what each part does.

1. Read the parts. The large intestine absorbs water from the food that is left.
   absorbs water
2. Write the answer.
   Large intestine

Check. The small intestine absorbs nutrients instead. ✓

Method. Read the types of tooth.

1. Read the types. The molars at the back grind food.
   grind food
2. Write the answer.
   Molars

Check. Molars are large and flat. ✓

Method. Read the table of animals.

1. The lion. The lion has sharp canines to tear meat.
   canines
2. The cow. The cow has flat molars to grind grass and plants.
   molars
3. Write the answer.
   Canines; molars

Check. The teeth suit the food. ✓

Method. Read the parts near the end.

1. Find the store. The rectum stores waste before it leaves the body.
   rectum
2. Find the exit. The waste leaves the body at the anus.
   anus
3. Write the answer.
   Rectum; anus

Check. The rectum comes just before the anus. ✓

Method. Think about sugar and teeth.

1. Think about the sugar. Sugar left on teeth can cause decay.
   decay
2. Write the reason. Brushing removes the food left on the teeth, so it protects them.
   removes
3. Write the answer.
   Accept any sentence that says sugar left on teeth can cause decay, and brushing removes it.

Check. Brushing removes food from teeth. ✓

Method. Think about each part.

1. The stomach. The stomach churns the food and breaks it down.
   breaks down
2. The small intestine. The small intestine finishes digesting and absorbs the nutrients into the blood.
   absorbs
3. Write the answer.
   Accept any sentence that says the stomach breaks food down, and the small intestine finishes digesting it and absorbs the nutrients.

Check. Digestion needs more than one part. ✓