MEDIUM
10th CBSE
IMPORTANT
Earn 100

Draw a diagram of a pond ecosystem and write any one aquatic food chain.

Important Questions on Our Environment

EASY
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>KNOWLEDGE BASKET>Q I
_____ (Mesosphere/ Ozone/ Nitrogen/ CFC) shield checks the entry of UV rays on to earth.
EASY
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>KNOWLEDGE BASKET>Q I

Fill in the blank with the correct term from the bracket.

When DDT enters a food chain, it leads to _____. (biomagnification/eutrophication/bloom)

EASY
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>ORAL TEST>Q 3
What is the substance that can be broken down by decomposers called? (Biodegradable/ non-biodegradable/ toxic)
EASY
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>ORAL TEST>Q 7
Reduction in the emission of which type of chemical was agreed in an agreement facilitated by UNEP in 1987. (Chlorofluorocarbon/hydrofluorocarbons,  perfluorocarbons)
EASY
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>ORAL TEST>Q 10
What is a network of intermingled food chains called?
EASY
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>MULTIPLE CHOICE QUESTIONS>Q 2
Which of the following is a biodegradable substance?
EASY
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>MULTIPLE CHOICE QUESTIONS>Q 6
How much energy is transferred from one trophic level to the next trophic level?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE BIOLOGY Class-10>Chapter 5 - Our Environment>LET US PRACTICE MORE>Q 12

(a) Make a list each of biodegradable and non-biodegradable materials.

(b) State one method each of their disposal if available as waste.