Chapter 1 – The Ever-Evolving World of Science 7th

 

Chapter 1 – The Ever-Evolving World of Science

35 MCQ Questions

1. What is science?

A. A type of game
B. The systematic study of the natural world
C. A type of food
D. A language

2. What is the strong desire to learn or know something new called?

A. Observation
B. Curiosity
C. Prediction
D. Motion

3. What does observation mean?

A. Guessing something
B. Carefully noticing things using our senses
C. Drawing a picture
D. Writing a story

4. What is exploration?

A. Examining something to find out more about it
B. Sleeping
C. Playing a game
D. Memorising a book

5. Which instrument is used to see very small objects?

A. Telescope
B. Thermometer
C. Microscope
D. Compass

6. Which of the following can be seen with the help of a microscope?

A. Mountains
B. Germs and cells
C. The Sun
D. Clouds

7. Which branch of science studies force, motion, light and heat?

A. Biology
B. Chemistry
C. Physics
D. Geography

8. Which branch of science studies substances and their changes?

A. Physics
B. Chemistry
C. Biology
D. Astronomy

9. Which branch of science studies living organisms?

A. Biology
B. Physics
C. Chemistry
D. Mathematics

10. Which of the following is an example of observation?

A. Noticing that a shadow changes its length
B. Sleeping
C. Playing football
D. Eating food

11. What do scientists usually do to test an idea?

A. Experiment
B. Sleep
C. Guess only
D. Ignore it

12. What are life processes?

A. Activities that keep living things alive
B. Activities of machines
C. Changes in weather
D. Movements of planets

13. Which of the following is a life process?

A. Breathing
B. Reading
C. Writing
D. Drawing

14. How do green plants prepare their food?

A. Respiration
B. Photosynthesis
C. Digestion
D. Evaporation

15. Which is needed by plants for photosynthesis?

A. Sunlight
B. Plastic
C. Iron
D. Rubber

16. Which gas is used by plants during photosynthesis?

A. Oxygen
B. Carbon dioxide
C. Nitrogen only
D. Hydrogen

17. Which gas is released during photosynthesis?

A. Carbon dioxide
B. Oxygen
C. Hydrogen
D. Nitrogen

18. What happens to milk when it is left outside for some time in summer?

A. It freezes
B. It turns sour
C. It becomes ice
D. It becomes solid immediately

19. Which material is attracted by a magnet?

A. Wood
B. Plastic
C. Iron
D. Paper

20. What happens to salt when it is added to water?

A. It dissolves
B. It becomes a magnet
C. It burns
D. It freezes

21. Which of the following is a conductor of electricity?

A. Rubber
B. Plastic
C. Copper
D. Wood

22. Which of the following is an insulator?

A. Copper
B. Iron
C. Aluminium
D. Rubber

23. What is a reversible change?

A. A change that can be reversed
B. A change that can never happen
C. A change that always produces heat
D. A change in living things only

24. Which is an example of a reversible change?

A. Burning paper
B. Melting ice
C. Burning wood
D. Cooking food

25. Which is an example of an irreversible change?

A. Melting ice
B. Freezing water
C. Burning paper
D. Melting wax

26. What happens to wax when a candle is lit?

A. It freezes
B. It melts
C. It becomes ice
D. It disappears without changing

27. Why does a sliced apple turn brown when left in the open?

A. It undergoes a change on exposure to air
B. It freezes
C. It becomes water
D. It absorbs sunlight only

28. What is heat?

A. A form of energy
B. A type of material
C. A type of plant
D. A shadow

29. Which process involves the removal of heat from water?

A. Boiling
B. Freezing
C. Melting
D. Heating

30. What device was traditionally used to tell time using the Sun's shadow?

A. Microscope
B. Sundial
C. Thermometer
D. Compass

31. What causes day and night?

A. Earth's revolution
B. Earth's rotation
C. The Moon's rotation
D. Clouds

32. What is the rotation of Earth?

A. Movement of Earth around the Sun
B. Spinning of Earth on its axis
C. Movement of the Moon around Earth
D. Movement of clouds

33. What is the revolution of Earth?

A. Spinning on its axis
B. Movement around the Sun
C. Movement around the Moon
D. Movement of clouds

34. Why is a shadow formed?

A. Because light is blocked by an opaque object
B. Because there is no air
C. Because objects produce darkness
D. Because the Sun stops shining

35. Which of the following is an important feature of scientific learning?

A. Asking questions and testing ideas
B. Avoiding experiments
C. Never observing anything
D. Accepting every idea without testing

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Answer Key

Q.	Answer	Q.	Answer	Q.	Answer	Q.	Answer	Q.	Answer
1	B	8	B	15	A	22	D	29	B
2	B	9	A	16	B	23	A	30	B
3	B	10	A	17	B	24	B	31	B
4	A	11	A	18	B	25	C	32	B
5	C	12	A	19	C	26	B	33	B
6	B	13	A	20	A	27	A	34	A
7	C	14	B	21	C	28	A	35	A