15. When an opasue object comes in
a) an image with colors
b) shadow
c) black and white image
d) depends on the colour of the light
.
Read the comprehension and answer the following questions from 16 to 20
There are many ways to travel to new and different places. Moving from one sace
another is called transportation. Inventors long ago woted on ways to magnets
transportation
Magnets are special because they can move other magrets without touching the
Magnets have a force that can attract and repe other magnets at means to bring
close and repel means to push away.
Now people can travel on a very fast train that uses magrets to move This trains
maglev train and it can move hundreds of peope almost as fast as an airplane
The maglev train and train tracks both have magnets that section to make them
stronger and weaker. Some magnets in the train tracis attract the train to move forward
while other magnets repel the train from behind. This is how magle train moves very
fast.
16. How can magnets move other magnets?
17.Do magnets need to touch each other to move?
18. Would you like to travel on a maglev train? Why ar why not?
19. What is the unique property of magnetism?
20. Could you change the strength of the magnetic forces on the train?
SECTION B
Answer in short:
17x2 = 14)
21. Is it possible for you to find out whether a plant has taproot or fibrous roet by looking
at the impression of its leaf on a sheet of paper?
22. Define habitat.
23. 3RS- Reduce, Re-use and Recycle. How do you follow 3R's in your life? Comment
about it.
24. Match the following:
a) Spinning
b) Ginning
c) Weaving
d) Knitting
single thread
separating seed
fibre to yarn or thread
two thread
Answers
Answer:
15. d) depends on the color of the light.
16. The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).
17. No, magnets need not need to touch other magnets to move.
18. Yes, I would definitely like to travel on a maglev train as it can move hundreds of people almost as fast as an airplane, thus saving our time and making us reach to our destination sooner.
19. Magnets have :
- Attractive Property – Magnet attracts ferromagnetic materials like iron, cobalt, and nickel.
- Repulsive Properties – Like magnetic poles repel each other and unlike magnetic poles attract each other.
20. This change may be produced in several ways; you can change the strength of the magnetic field, move the conductor in and out of the field, alter the distance between a magnet and the conductor, or change the area of a loop located in a stable magnetic field.
Explanation: