Unseen Passage for Class 6 with Questions

Reading comprehension lesson 21: Science and environment passages · Set 84 · 12 questions

Reading tip (Cause and effect): Find the topic of the passage in the first sentence. Look for cause-and-effect words: because, so, as a result. Work out new science words from the sentence that explains them.

1. 1.A vaccine helps the body fight a disease before the disease attacks. It contains a weak or harmless form of a germ. The body’s defence system learns to recognise it. It then makes special fighters called antibodies. Later, if the real germ enters, the body knows how to beat it quickly. Children in India get vaccines against polio, measles and other diseases. Most vaccines are given as injections, but the polio vaccine can be given as drops. Vaccines have saved millions of lives.
   
   What does a vaccine contain? (a) Strong medicine (b) Sugar and salt (c) A weak form of a germ (d) Only vitamins
2. 2.Plastic is cheap, light and strong. But most plastic does not rot away like leaves or fruit peels. A plastic bag may stay in the soil for hundreds of years. Plastic thrown on the road often blocks drains during the monsoon. Cows and other animals sometimes swallow plastic with food scraps. In the sea, turtles can mistake floating bags for jellyfish. We can help by carrying cloth bags and saying no to straws. Sorting dry and wet waste at home also helps.
   
   How long may a plastic bag stay in the soil? (a) Ten minutes (b) A few days (c) Hundreds of years (d) One month
3. 3.A magnet attracts things made of iron, nickel or cobalt. Every magnet has two ends called poles: a north pole and a south pole. If you bring two north poles together, they push each other away. A north pole and a south pole pull towards each other. In short, like poles repel and unlike poles attract. A magnet hung freely always points north and south. Sailors once used this idea to make the compass. Magnets also work inside fans, speakers and fridge doors.
   
   What does “repel” mean in the passage? (a) Spin round (b) Push away (c) Break (d) Pull closer
4. 4.A vaccine helps the body fight a disease before the disease attacks. It contains a weak or harmless form of a germ. The body’s defence system learns to recognise it. It then makes special fighters called antibodies. Later, if the real germ enters, the body knows how to beat it quickly. Children in India get vaccines against polio, measles and other diseases. Most vaccines are given as injections, but the polio vaccine can be given as drops. Vaccines have saved millions of lives.
   
   What special fighters does the body make? (a) vaccines (b) injections (c) antibodies (d) germs
5. 5.Every living thing needs food for energy. Plants make their own food using sunlight. A grasshopper eats grass. A frog eats the grasshopper. A snake eats the frog, and an eagle eats the snake. This link of who eats whom is called a food chain. Every food chain begins with a green plant. If one link disappears, the whole chain is affected.
   
   What does every food chain begin with? (a) A frog (b) A green plant (c) An eagle (d) A snake
6. 6.The monsoon is a seasonal wind that brings rain to India. In summer, the land heats up faster than the sea. Moist winds then blow from the sea towards the land. The south-west monsoon usually reaches Kerala in early June. Over the next few weeks, it spreads across most of the country. Farmers wait eagerly for it because many crops need its rain. Rice, for example, grows in fields full of water. A weak monsoon can mean a poor harvest.
   
   What does “eagerly” mean in the passage? (a) Lazily (b) Keenly (c) Sadly (d) Angrily
7. 7.The Earth spins like a top on an imaginary line called its axis. One full spin takes about twenty-four hours. As the Earth spins, one half faces the Sun and has day. The other half faces away and has night. The Earth also moves around the Sun. One trip around the Sun takes about 365 days, which is one year. The tilt of the Earth’s axis gives us seasons. So spinning gives us day and night, while the tilt and the yearly trip give us seasons.
   
   What causes day and night? (a) The Sun switching off (b) Clouds covering Sun (c) The Moon moving (d) The Earth spinning
8. 8.A magnet attracts things made of iron, nickel or cobalt. Every magnet has two ends called poles: a north pole and a south pole. If you bring two north poles together, they push each other away. A north pole and a south pole pull towards each other. In short, like poles repel and unlike poles attract. A magnet hung freely always points north and south. Sailors once used this idea to make the compass. Magnets also work inside fans, speakers and fridge doors.
   
   What happens when two north poles are brought together? (a) They melt (b) They push away (c) They stick (d) They pull together
9. 9.Earthworms are called the farmer’s friends. They dig tunnels as they move through the soil. These tunnels let air and water reach plant roots. Earthworms eat dead leaves and bits of rotting plants. Their waste, called castings, makes the soil rich. A field with many earthworms is usually healthy. Chemical sprays can kill these helpful creatures. So many farmers now use natural manure instead.
   
   What are earthworms called? (a) The soil’s enemies (b) The night hunters (c) The garden pests (d) The farmer’s friends
10. 10.The Sun gives us a huge amount of energy every day. Solar panels can turn sunlight into electricity. They are made of special cells that work when light falls on them. Many homes in India now have solar panels on their roofs. Some villages use solar lamps after dark. Solar energy does not make smoke, so it keeps the air clean. Unlike coal, it will never run out. However, panels make less power on cloudy days.
    
    True or false: Solar energy will run out one day. (a) True (b) False
11. 11.Mangroves are trees that grow in salty water along the coast. Their roots stick out of the mud like knobbly fingers. These roots help the trees breathe in wet, airless soil. Mangrove forests protect the coast from strong waves and storms. They also give shelter to fish, crabs and birds. The Sundarbans, shared by India and Bangladesh, is the largest mangrove forest in the world. It is home to the Royal Bengal tiger. Cutting mangroves leaves the coast open to damage.
    
    Which big cat lives in the Sundarbans? (a) Royal Bengal tiger (b) Snow leopard (c) Cheetah (d) Asiatic lion
12. 12.Every living thing needs food for energy. Plants make their own food using sunlight. A grasshopper eats grass. A frog eats the grasshopper. A snake eats the frog, and an eagle eats the snake. This link of who eats whom is called a food chain. Every food chain begins with a green plant. If one link disappears, the whole chain is affected.
    
    Which animal eats the snake? (a) A deer (b) A frog (c) An eagle (d) A grasshopper

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