photosynthesis

Question 1

What is the process by which green plants make food using sunlight?

Answer 1

Photosynthesis

This process allows plants to convert carbon dioxide and water into glucose and oxygen.

Question 2

What term describes organisms that can produce their own food?

Answer 2

Producers

Examples include green plants and some algae.

Question 3

What do we call organisms that cannot make their own food and rely on others?

Answer 3

Consumers

Animals are classified as consumers.

Question 4

What are the raw materials needed for photosynthesis?

Answer 4

• Carbon dioxide
• Water

These materials are essential for the photosynthesis process.

Question 5

What are the products of photosynthesis?

Answer 5

• Glucose
• Oxygen

These are the substances produced during photosynthesis.

Question 6

What pigment in plants absorbs light necessary for photosynthesis?

Answer 6

Chlorophyll

Chlorophyll is primarily found in the chloroplasts of plant cells.

Question 7

After photosynthesis, what do plants convert glucose into for storage?

Answer 7

Starch

Starch serves as a long-term energy storage form for plants.

Question 8

What solution is used to test for the presence of starch?

Answer 8

Iodine solution

A blue-black color indicates the presence of starch.

Question 9

Fill in the blank: _______ is necessary for photosynthesis.

Answer 9

Light

Question 10

Fill in the blank: _______ is needed for respiration.

Answer 10

Oxygen

Question 11

Fill in the blank: _______ is released during respiration.

Answer 11

Carbon dioxide

Question 12

What is the first step in the starch test for leaves?

Answer 12

Boil the leaf in hot water for 5 minutes

This step kills the leaf cells and softens the leaf.

Question 13

What is the second step in the starch test for leaves?

Answer 13

Put the leaf into a test tube containing alcohol

This step removes the leaf’s color.

Question 14

What is the third step in the starch test for leaves?

Answer 14

Put the leaf back into hot water

This step hydrates the leaf after alcohol treatment.

Question 15

What is the final step in the starch test for leaves?

Answer 15

Drop some iodine solution on the leaf

This step tests for the presence of starch.

Question 16

Why did Sally leave the plant in darkness for 24 hours before her experiment?

Answer 16

To destarch the plant

This ensures any starch tested represents newly synthesized starch.

Question 17

What are the different parts of a leaf?

Answer 17

• Upper epidermis
• Palisade mesophyll
• Stoma/Stomata
• Chloroplast/Chlorophyll
• Nucleus
• Spongy mesophyll

Question 18

Why is the stoma important for the leaf to carry out photosynthesis?

Answer 18

It allows carbon dioxide to enter and oxygen to leave

This gas exchange is crucial for photosynthesis.

Question 19

Why are the palisade mesophyll and spongy mesophyll organized differently?

Answer 19

Palisade mesophyll is tightly packed for maximal sunlight absorption, while spongy mesophyll is loosely packed for gas exchange

This structural difference facilitates their respective functions.

Question 20

Why are stomata located mostly on the underside of the leaf?

Answer 20

To prevent excessive water loss due to sunlight exposure

This helps maintain the plant’s hydration.

Question 21

Create a food chain using the following organisms: nettles, caterpillar, field vole, barn owl.

Answer 21

nettles -> caterpillar -> field vole -> barn owl

This chain illustrates the flow of energy through the ecosystem.