Samacheer Kalvi solutions for Science - Term 3 [English] Class 6 TN Board chapter 4 - Our Environment [Latest edition]

Identify who am I?

I am the type of pollution caused by burning of fossil fuels like petrol or coal and the smoke of burning garbage. I float around and cause breathing problems. I am _______ pollution.

Think of the objects in your home. Just keep in mind, the books, toys, furniture, food materials, and even pets of your home. These living and non-living things together make your home. Look at the following picture and list out the living and non-living things, in the pond.

Identify the fresh water ecosystem.

Producers are ________.

It is a biodegradable waste.

It is an undesirable change that occurs in air and water

Usage of chemical pesticides and fertilisers causes ________ pollution.

Identify who am I?

I am the type of pollution caused by loud sounds and I can cause serious damage to your ears and also affect sleep. In India, I am mainly caused by loudspeakers and the honking of air horns of cars. I am ______ pollution.

Take a square paper. Fold its diagonals. Draw three lines in three triangles as shown in the picture.

Cut from the edge of the diagonal to the center as shown in the picture.
If you fold this triangle and paste it behind the third triangle you get a pyramidal shape.
In one of the triangles, draw images of each of the organisms in the different levels.
In another triangle write the names of the organisms. In the last triangle, write the energy level of the organism. Have a look at the following example. You must come up with different organisms!.

Primary consumers that eat plants are called _______.

Temperature, light and wind are ________ factors.

_______ is the process of converting waste materials into new materials.

Water pollution can spread ________ diseases in man.

The 3R’s are Reduce, ______, and Recycle.

Give some examples for Biodegradable and Non-biodegradable waste.

Identify who am I?

I flow from homes and farms into rivers and lakes. I kill fish and make water unfit for drinking. I am _______ pollution.

The Pacific ocean is an example of an marine ecosystem.

Bacteria and fungi are called decomposers.

Human and animal wastes are examples of non-biodegradable waste.

Excessive use of pesticides leads to air pollution.

In schools, waste management rules say that we should separate waste into two categories.

Match the following

Identify who am I?

I am the type of pollution caused by using too much chemical fertilizers and pesticides by farmers. I lower the quality of soil and even move chemicals into plant parts which are eaten by people. I am _____ pollution.

Arrange the following in a correct sequence and form a food chain

Rabbit → Carrot → Eagle → Snake

Arrange the following in a correct sequence and form a food chain

Human → Insect → Algae → Fish

Define ecosystem.

What are the two types of ecosystems?

Write any two things that can be recycled.

What are the types of pollution?

Give one example of a food chain in an aquatic ecosystem?

What are Pollutants?

What are the pollutions caused by the objects given below?

1. Loud Speaker
2. Plastic

What is biodegradable waste?

How can we reduce water pollution?

Write the importance of the food chain.

Give two examples of how you can avoid or reduce waste?

Write a short note on noise pollution.

What would happen if an organism is removed from the food chain?

Explain the link between waste and dangerous diseases like dengue and malaria?

See the diagram and answer the following question

Explain what is happening in the picture?

See the diagram and answer the following question

What types of pollution are caused by open dumps?