THE LIVING AND THE NON-LIVING
learning science class 6 solutions
Section – B
A. Multiple Choice questions (MCQs) Scientific/ Practical skills:
1. When a potted plant is kept near a window from where light is comingin, the stem of the plant will ___________________ .
a) grow straight up b) grow towards the window c) grow away from the window d) not grow at all
Ans: b) grow towards the window
2. When we exhale air in a test tube containing lime water, the appearance of milky colour indicates that the exhaled air is rich in_________ gas.
a) oxygen b) carbon dioxide c) nitrogen d) hydrogen
Ans: b) carbon dioxide
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B. Very Short Answer Question:
1. Name the process by which living things obtain energy from food.
2. Which part of the leaf takes part in exchange of gases?
Ans: Stomata and guard cells.
3. Name any two animals which reproduce by a) giving birth to babies b) through hatching of their eggs.
Ans: a)Monkeys and humans. b) Hens and Ducks
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C. Short Answer Questions:
1. What is meant by lifespan? What is the average life span of humans?
Ans: The duration for which a living organism remains alive is called its lifespan. The average lifespan of humans is 65-80 years.
2. Which of the following were once part of living things? leather, wool, electric bulb, salt, mango, wooden table metallic bucket
Ans: Leather, wool, mango, and wooden table were once part of living things.
3. What is meant by respiration? Why is respiration essential for living organisms?
Ans: Respiration is the process of breakdown of food in the body of an organism with the help of oxygen to release carbon dioxide, water, and energy. Respiration is essential for living organisms because, without it, living organisms won’t be able to absorb energy from food and die.
4. Manoj sees a dog in his garden. He picks up a stone and throws it at the dog. The dog gets hurt and within no time bites Maanoj’s leg. Manoj’s friend, Arjun, takes him to the doctor. The doctor immediately gives him first aid and injections. Manoj promises his parents and friends that he will not repeat this in the future.
(a) Name the ‘stimulus’ and ‘response’ in this case.
(b) What values do you learn from Arjun and Manoj?
Ans: a) Throwing stone on a dog is a stimulus and the dog’s biting Manoj’s leg is the response in this case.
b) We can learn to behave properly with animals and to not harm them from Manoj, and from Arjun, we can learn to help our friends in need.
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D. Long Answer Questions:
1. Explain how different organisms carry out the exchange of gases. Give one example of each.
Ans: In plants exchange of gases happens through stomata and lenticels. For example, in Mango and Neem tree. In aquatic animals, the exchange of gases takes place through gills. Terrestrial animals carry out the exchange of gases through the lungs.
2. Animals grow only till a particular age, whereas plants grow throughout their life. Justify.
Ans: Animals grow only till a particular age and after that, they stop growing. Plants continue to grow throughout their life due to the presence of meristematic tissues at certain locations on their body.
3. a) A plant grows towards sunlight. Mention the stimulus and the response.
b) What is meant by ‘stimulus’ and ‘sensitivity’?
Ans: a) In the given situation, the light coming from the sun is a stimulus, and the change of direction of the plant is a response.
b) Any change in the surroundings of an organism to which it responds is called stimulus. for example, light, touch, smell, sound etc. The ability to respond to any external change is called sensitivity.
4. a) Which characteristic of living things is shown in the figure given alongside?
b) Distinguish between ’tissues’ and ‘organs’.
Ans: a) Growth is a feature in the living things that is shown in the figure.
b) A group of similar cells that perform a particular function together is called a tissue. Organs are a group of tissues that work together to perform a particular function in the body. For example, mouth, liver, eyes, etc.
5. a) What is the common feature in living things and non-living things?
b) Give any four differences between living things and non-living things.
Ans: a) Both living and non-living things are made of matter because both have mass and both occupy space.
b) (i) All living things are made up of cells but non-living things are not made up of cells.
(ii) Living things need nutrition while non-living things don’t need it.
(iii)All living things reproduce but non-living things can’t reproduce.
(iv) Living things have a definite lifespan while non-living things do not have a definite lifespan.