Chapter 9

 

Solar system and our Earth 

 

Science, Class 4

PTBB, Pakistan 2023  SLO's Topics covered in questions 


Constructed Response Questions:

i. Which phenomena shown in the following figures?


Answer:


1. solar eclipse 2. lunar eclipse
Solar system and our Earth,


1. solar eclipse              2. lunar eclipse


ii. In the following picture, each arrowhead shows the axial or orbital movement of Earth and Moon. Write the correct type of movement in the box given each arrowhead.




In how many days does the Moon completes one rotation around the Earth?

Answer:

28 or 29 days


In how many days does the Earth completes one rotation around the Sun?

Answer:

The Earth completes one full rotation around the Sun in approximately 365.25 days.


iii. Identify the season in the southern hemisphere as per given figure. Write the correct season in the boxes given near the dates.



21 March season is Spring

22 June season is summer

22 December season is winter

23 September season is Autumn



 Investigate



If the sun stops providing light and heat, what will be its effect on the Earth? Would life be possible on the Earth?

Answer:

If the Sun stops providing light and heat, Earth would become extremely cold and life would likely become unsustainable due to freezing temperatures.



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