1. Land,water, air, etc, comprise the ...................environment.

1. What is an abiotic component of environment?

Natural environment can be divided into............................types.

When is World Environment Day is celebrated?

An artificial ecosystem is

Ozone layer protects us from harmful ultra-violet radiations of the sun.

Environment is damaged by use of paper bag.

was the class fruitful?

When is World Environment Day is celebrated?

Which of the following is a primary consumer in a grassland ecosystem?

What percentage of energy is passed on to next tropic level?

What is this called?

Which organism recieves the least amount of energy from the producer?

The phenomenon by which toxins concentrate in the organisms at higher trophic levels within an ecosystem is known as...

Consider the following food chain:

Algae > Mayfly > Minnow > Trout

In a polluted ecosystem, which organism is likely to have the HIGHEST level of toxic chemicals in its body?

What does the Ozone in the atmosphere do?

What damage can UV rays cause?

What is causing damage to the Ozone layer?

Identify the non- biodegradable substance from the following.

An artificial ecosystem is

Each step of a food chain is called as

Which of the following constitute a food chain?

Calculate the amount of energy available to snake in the given food chain if there is 6500 J of energy available to grass hopper.

Grass ----> grass hopper ---> frog -----> snake

Why do we need to manage the garbage we produce

i)To improve the health and quality of life

ii)For preventing environmental pollution

iii) To produce more biodegradable plastics

iv) To reduce the strain on natural resources

Non biodegradable waste materials can be treated by composting technique.

Non biodegradable wastes can be managed by practicing techniques like

___________________ are found as an alternative for plastics which are decomposed by microbial action.

Which trophic level comprises of producers?

What the source of energy for all food chains?

Decomposers are important because (check all the correct answers)

Q. 1 Read the statement and answer the questions that follow: A non biodegradable toxic chemical has entered into the food chain consisting of 4 trophic levels.

(a)Which trophic level of a food chain is likely to be more affected by this incident.?

(b) What phenomenon is responsible for the accumulation of non biodegradable material in the food chain?

(c) Would this phenomenon have occurred if the chemical that had entered the food chain was biodegradable?

Pick the odd one out

Zoo, aquarium, garden are all types of _________________ ecosystem