Sunday , February 23 2020
Living and Non-living

NCERT 6th Class (CBSE) Science: Living and Non-living

Question: All living things take in oxygen. What function does oxygen perform on the body?

Answer: Oxygen combines with the food (glucose) and converts it into energy. This energy is utilized for various life process.

Question: Name four waste products that we excrete.

Answer: The four waste products that we excrete are:

  1. Urine
  2. Sweet
  3. Stool
  4. Carbon dioxide.

Question: List four different ways in which organisms carry out exchange of gases for respiration, with one example each.


  1. Animals like cow, dogs and birds breathe like human beings.
  2. Earthworm breathe through skin.
  3. Cockroaches and many other inseds breaths through several holes its body.
  4. Fish breathe through gills.
  5. Plants exchange gases which take place through the tiny stomata in their laves.

Question: List three ways in which living things reproduce, giving one example of each.

Answer: Three ways are:

  1. By seed – wheat, fruits etc.
  2. By baby – human being, dog, cow etc.
  3. By eggs – snakes, hen etc.

Question: Explain giving examples what you mean by a ‘species’.

Answer: A Species is a group of similar living organisms that have similar body parts live in the same habitat, eat the kind of food and reproduce among themselves.

Question: Plants take in oxygen and give out carbon dioxide during respiration all that time. Why do we them say that plants supply oxygen to the air.

Answer: During day time they produce oxygen much more then they need for respiration. So they excrete out excess oxygen.

Question: What are cells? Are all living things made up of cells?

Answer: Living things are made up of cells, they grow, have a definite lifespan, reproduce, respond to stimuli, need food, respire and excrete.

Question: Give an example of a stimulus and a response.

Answer: When you accidentally touch a hot utensil. you quickly withdraw your hand. The withdrawing of your hand is a response. The cause  of this response is called the stimulus which in this case is the hot utensil.

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