List the similarities and differences between aerobic and anaerobic respiration.
Similarities between Aerobic and Anaerobic Respiration
Aerobic respiration | Anaerobic respiration |
1. In aerobic respiration, energy is produced by the breakdown of food (like glucose). | 1. In anaerobic respiration also energy is produced by the breakdown of food (like glucose). |
2. Aerobic respiration takes place in the cells of the organism. | 2. Anaerobic respiration also takes place in the cells of the organism. |
Differences between Aerobic and Anaerobic Respiration
Aerobic respiration | Anaerobic respiration |
1. Aerobic respiration takes place in the presence of oxygen. | 1. Anaerobic respiration takes place in the absence of oxygen. |
2. Complete breakdown of food occurs in aerobic respiration. | 2. Partial breakdown of food occurs. |
3. The end products in aerobic respiration are carbon dioxide and water. | 3. The end products in anaerobic respiration may be alcohol and carbon dioxide like in yeast, or lactic acid like in muscles. |
4. Aerobic respiration produces a considerable amount of energy. | 4. Much less energy is produced in anaerobic respiration. |
5. Fermentation process is shown by the anaerobes in the cytoplasm. In this Glucose breaks down into ethyl alcohol and carbon dioxide without using oxygen, also known as alcoholic fermentation and lactic acid fermentation. Alcoholic fermentation or yeast oxidization:- C6H12O6 → 2 C2H5OH + 2 CO2 + Energy (Glucose) (Ethyl alcohol) (Carbon dioxide) |
5. Glucose get break down into the carbon dioxide, water and energy is released in the form of ATP is aerobic respiration. It yields more energy available in glucose. C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy |
Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food
Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
Down Across
(D) 1 : Thorough washing (A) 1 : Keeps warm
2 : Animal fibre 2 : Its leaves are eaten by silkworms
3 : Long thread like structure 3 : Hatches from egg of moth
Sketch the cross section of soil and label the various layers.
Here is a crossword puzzle: Good luck!
Across
3. Liquid waste products
4. Solid waste extracted in sewage treatment
6. A word related to hygiene
8. Waste matter discharged from human body
Down
1. Used water
2. A pipe carrying sewage
5. Micro-organisms which causes cholera
7. A chemical to disinfect water
Take three test-tubes. Fill æth of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO2?
Sketch the reproductive parts of a flower.
Solve the following crossword puzzle with the clues given:
Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6. Type of soil used for making pottery.
7. Living organism in the soil.
Down
1. In desert soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
5. Collective name for layers of soil.
Describe how crystals of copper sulphate are prepared.
Match the items in Column I with those in Column II:
Column I Column II
(i) A home for living organisms (a) Large particles
(ii) Upper layer of the soil (b) All kinds of soil
(iii) Sandy soil (c) Dark in colour
(iv) Middle layer of the soil (d) Small particles and packed tight (v) Clayey soil (e) Lesser amount of humus
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Why does an athlete breathe faster and deeper than usual after finishing the race?
Name two chemicals used to disinfect water.
Where is the bile produced? Which component of the food does it help to digest?
Fig. 13.15 shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?
Fig. 13.15 Distance-time graph for the motion of two cars
Fill in the blanks:
(a) Production of new individuals from the vegetative part of parent is called_____________.
(b) A flower may have either male or female reproductive parts. Such a flower is called_____________.
(c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as _____________.
(d) The fusion of male and female gametes is termed as _____________.
(e) Seed dispersal takes place by means of _____________, _____________ and _____________.
Fill in the blanks with the appropriate answers:
(a) People obtain groundwater through________ and ________. (b) Three forms of water are ________, ________ and ________.
(c) The water bearing layer of the earth is ________.
(d) The process of water seepage into the ground is called ________.
Which one of the following is not responsbile for water shortage?
(i) Rapid growth of industries
(ii) Increasing population
(iii) Heavy rainfall
(iv) Mismanagement of water resources
Which of the following is not a forest product?
(i) Gum
(ii) Plywood
(iii) Sealing wax
(iv) Kerosene
Suggest two methods to find out wind direction at a given place.
Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?