MEDIUM
Lower Secondary Stage 8
IMPORTANT
Earn 100
Compare mechanical digestion and chemical digestion.
Important Questions on Obtaining Food
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Enzymes are biological catalysts. Explain what is meant by 'biological catalyst'.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Dinesh is investigating what nutrients are found in bread.
He adds a drop of iodine solution onto a piece of bread.
Complete the prediction using the words from the list:
| stay orange-brown turn blue-black turn pink |
The iodine will _____ because the bread contains starch.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Iodine can be harmful. Write down one way in which Dinesh can control the risks to himself.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Describe one way the body uses the starch we eat.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Name one condition that can result from eating too many starchy foods.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Name two substances the water lily always needs to make food.
EASY
Lower Secondary Stage 8
IMPORTANT
Name the chemical reaction that plants use to make food.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Mia tests a lily leaf to find out if it contains starch. These are the steps she uses. They are in the incorrect order.
| A | B | C | D |
| Wash the leaf in water (to remove ethanol and soften it again) | Add iodine solution to the leaf | Remove chlorophyll using ethanol | Soften the leaf by boiling water |
