Q1. Floods are caused by
(b) Cutting the forests
(c) Tilling the land
(d) Construction of mega dams
Q2. Condensation is
(a) Changing water into ice by cooking
(b) Changing water vapor into water
(c) Changing ice into water by heating
(d) Changing water into ice by heating
Q3. Which of the following kind of houses is most effective in a place that is very hot and dry?
(a) A house made of bricks and mortar
(b) A house made up of ice
(c) A house made up of clay and thatch or coconut branches
(d) All of these
Q4. Which of the following structures links biotic and abiotic components of ecosystems?
(a) Biochemical structure
(b) Phenotypic structure
(c) Genotypic structure
(d) All of the above
Q5. Which of the following raw materials is not required by the plant to synthesize food?
(b) Carbon dioxide
(d) None of these
Q6. The organization which has published “Red Data Book” is-
(a) Convention or International Trade in Endangered Species of Wild Fauna and Flora
(b) The International Union for Conservation of Nature and Natural Resource
(c) National Wildlife Action Plan
(d) National Environmental Engineering Research Institute
Q7. Sanjana found that after a few minutes of chewing some rice, the rice starts to taste sweeter. This happens because
(a) The rice is exposed to air
(b) The teeth give out a sweet liquid
(c) The saliva in the mouth begins to break down and mixed with it.
(d) The tongue is sensitive to sweet taste
Q8. Which one of the following(s) is NOT a reason for the shortage of usable water?
(b) Climate change
(d) Decrease in sea level
Q9. Students were taken to a museum on an educational trip. Which one of the following documents will provide the information on endangered animals and plants?
(c) Red Data Book
Q10. Driving a car on a wet road is difficult because water
(a) makes it difficult to turn the car
(b) decreases the friction between the tyres and the road
(c) increases the friction between the tyres and the road
(d) makes friction between the road and tyres zero