F2 - SEM1 - Living things and air - 7.3

Question 1

What is Word equation of respiration?

7.3 Respiration

Answer 1

glucose + oxygen ——–> carbon dioxide + water

7.3 Respiration

Question 2

Food stores ____?

7.3 Respiration

Answer 2

Food stores chemical energy

7.3 Respiration

Question 3

What happened when food is burnt in air?

7.3 Respiration

Answer 3

The chemical energy is released quickly

7.3 Respiration

Question 4

What are inputs of/needs for Respiration?

7.3 Respiration

Answer 4

Glucose and Oxygen

7.3 Respiration

Question 5

What are the output of Respiration?

7.3 Respiration

Answer 5

Carbon dioxide and Water

7.3 Respiration

Question 6

Define what is Respiration

7.3 Respiration

Answer 6

The process which the chemical energy in food is released slowly through a series of chemical reactions in our cells.

7.3 Respiration

Question 7

Why is Respiration so important?

7.3 Respiration

Answer 7

During respiration, food (glucose) is broken down and energy in released
Chemical energy in food is changed into other useful forms of energy to support body activites.

7.3 Respiration

Question 8

Compare Photosynthesis and Respiration in terms of Substances used

7.3 Respiration

Answer 8

• Photosynthesis:
  Carbon dioxide and Water
• Respiration:
  Food (glucose) and Oxygen

7.3 Respiration

Question 9

Compare Photosynthesis and Respiration in terms of Substances produced

7.3 Respiration

Answer 9

• Photosynthesis:
  Food and Oxygen
• Respiration:
  Carbon dioxide and Water

7.3 Respiration

Question 10

Compare Photosynthesis and Respiration in terms of Energy conversion involved

7.3 Respiration

Answer 10

• Photosynthesis:
  Light energy -> Chemical energy stored in food
• Respiration:
  Chemical energy stored in food -> other useful forms

7.3 Respiration

Question 11

True or False?

Respiration does not occur in our cells when we are at rest

7.3 Respiration

Answer 11

False

We still need energy to breathe and keep our heart beating when we sleep

7.3 Respiration

Question 12

True of False?

Plants do no carry out respiration. Only animals carry out respiration.

7.3 Respiration

Answer 12

False

All living things need energy for various body activites

7.3 Respiration

Question 13

True or False?

Our body does not need energy when we are sleeping

7.3 Respiration

Answer 13

False

We still need energy to breathe and keep our heart beating when we sleep

7.3 Respiration

Question 14

True or False?

We obtain energy for body activities from the food we eat.

7.3 Respiration

Answer 14

True

7.3 Respiration

Question 15

True of False?

Plants undergo only photosynthesis but no respiration

7.3 Respiration

Answer 15

False

Plants undergo photosynthesis and respiration

7.3 Respiration

Question 16

Describe the energy convertion when food is burnt in air

7.3 Respiration

Answer 16

Chemical energy in food ->
light energy and thermal energy

7.3 Respiration