Let our kids exercise
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#1. The reflection of sound waves is called _________________
#2. The following are composition of air except
#3. Which from the list are the green house gas ?
#4. The gases which trap heat in the atmosphere are called ____________
#5. Which gas is used in lighting the bulb ?
#6. The major or main uses of Oxygen are the following except __________
#7. The moving mixture of many gases is called ________________
#8. The following are the types of wind except ________________
#9. Sound transmits through _____
#10. _____________ gas prevents rapid burning, used to make fertilizers ,does not provoke fizzy in soft drinks like in SODA
#11. The noticeable increase in temperature in the atmosphere is called ______________
#12. _________________ is not a source of carbon monoxide
#13. The following are the effects of carbon monoxide except
#14. Which gas is almost 1/5 of air
#15. ________________ is not the importance or use or function of Carbon dioxide
#16. The process by which green plants make their own food is called _________________-
#17. Which from the list is not a source of carbon dioxide
#18. 21% is the amount of ________________ in air
#19. During respiration, plants release or give our ___________________
#20. During photosynthesis, plants release or give out _____________-
