Homework lesson 01- Photosynthesis

Photosynthesis is..........

• the process how plants make food

• the process how oxygen turn into carbon dioxide

• the process how plants absorbing water

• the process how animals make food

Plants use ....... as their food

• starch

• glucose

• water

• oxygen

Plants store glucose in the form of..............

When we use iodine solution to test the presence of starch in leaves, iodine solution turns from ................. to ..................... with the presence of starch

• reddish brown to dark blue

• pink to orange

• white to dark blue

• green to black

When we use iodine to test the presence of starch, we need to remove chlorophyll to.............

• make the leaf lighter

• make the leaf colorless

• make the leaf become dark green

• make the leaf harder

What solution is used to remove chlorophyll in leaves?

• iodine solution

• water

• sodium

• ethanol

Why does iodine solution change color when it is put on leaves containing starch?

• iodine solution reacts with water

• iodine solution reacts with carbon dioxide

• iodine solution reacts with starch

• iodine solution reacts with oxygen

Why do plants keep staying green when we boil them in water?

• Chlorophyll is soluble in water

• Chlorophyll is soluble in ethanol

• Chlorophyll is insoluble in water

Why can't photosynthesis occur when plants are put in dark places?

• Oxygen is essential for photosynthesis

• Light is essential for photosynthesis

• Carbon dioxide is essential for photosynthesis

• Water is essential for photosynthesis

Chlorophyll is.............

• oxygen factory of plants

• yellow pigment in leaves

• brown pigment in roots

• the part that absorb water in root