Some Common Changes

Q.

Sublimation is a physical change.

1. True
2. False

Q. A physical change involves a change in the state of the substance.

1. True
2. False

Q. Size and direction of shadows changes with change in seasons.

1. True
2. False

Q.

Write a note on birds and animal found in the prairies.

Q.

Which hemisphere receives direct sunlight on 22nd December?

Q.

What is march equinox?

Q.

State whether the given statements is true or false: Stretching of the rubber band is not a physical change.

1. True
2. False

Q.

B. Statements given below are incorrect. Write the correct statements :

3. During a physical change a large amount of heat energy absorbed or given out.

Q. On which day the earth experiences summer solstice?

1. 21st March
2. 21st June
3. 22nd December
4. 23rd September

Q. How do you know that rusting of iron is a change?​

Q. Which of the following statements are correct regarding the duration of days?

1. Shorter in summers
2. Shorter in winters
3. Longer in summers
4. Longer in winters

Q.

Ram’s teacher wrote two statements on the board. Find out whether the statements are True or False.

(i) Crushing an empty can is a chemical change.

(ii) Folding a paper is a physical change.

Q. The orbiting of the Earth around the sun causes change in seasons.

1. False
2. True

Q. Which of the following change(s) is/are depicted by the given image

1. Temporary change
2. Permanent change
3. Physical change
4. Chemical change

Q.

1. (b) Give four examples of physical change.

Q.

How will you differentiate between evaporation and vaporisation ?

Q. How many seasons the earth experiences?

1. 3
2. 4
3. 5
4. 6

Q.

What is a physical change?

Q. Which of the following change is not observed during curdling of milk?

1. State
2. Weight
3. Colour
4. Taste

Q. The duration of day changes along with the season change.

1. True
2. False

Q. Changes causing the annual cycle of seasons and associated temperature changes are due to __________.

1. Heat emitted by the sun to the earth
2. The tilt of earth's axis relative to its orbit around the sun
3. Both $A$ and $B$
   
4. None of the above

Q. When the northern hemisphere have summer, the southern hemisphere experience ____________.

1. winter
2. summer
3. autumn
4. spring

Q. Which of the following are fast changes?

1. Germination of seed
2. Lightning
3. Growth of hair
4. Thundering

Q. How many season are there ?

1. Four season.
2. Two season.
3. Three season.
4. None of the above.

Q. Explain the term "cycle of seasons" .

1. Occurrence of season one after the other.
2. Changes in atmosphere.
3. Occurrence of rain in a specific period.
4. All of the above.

Q. Which of the following things change during curdling of milk?

1. State
2. Colour
3. Weight
4. Taste

Q. Which of the following change is not observed during curdling of milk?

1. State
2. Taste
3. Weight
4. Colour

Q. The explosion of fireworks is an example of __________ change.

1. physical
2. chemical
3. temporary
4. natural

Q. In the Antarctic region , which type of birds and animals are found ?

1. Penguins , walruses etc.
2. Reindeer .
3. Polar bear.
4. Arctic foxes.

Q. Choose the correct pairs based on seasons and their corresponding months in India.

1. Summer
2. Winter
3. Monsoon
4. Autumn
5. September
6. December
7. March
8. June