Chapter 9 The Living Organisms And Their Surroundings

 LESSON-9 THE LIVING ORGANISMS AND THEIR SURROUNDINGS

 

FILL IN THE BLANKS

 1. The respiratory organ of fish is GILLS.

2. Components of environment are BIOTIC and ABIOTIC

3. Sunlight is an ABIOTIC componen t of environment.

4. Organisms living on earth are known as TERESSTRIAL

ORGANISMS

5. All LIVING THINGS show growth and reproduce.

 

 

TRUE / FALSE

 

1. Cactus performs photosynthesis using its stems. (TRUE)

2. Camel’s hump stores water and food. (TRUE)

3. All green plants are producers. (TRUE)

4. Water, Air and Soil are biotic components. (FALSE)

 

 

MATCH THE COLUMN

 

1. The means of energy on earth          i. Plants or animals (4)

2. Arboreal animals                              ii. Thorns (3)

3.Cactus                                iii. Monkey (2)

4.Biotic component              iv. Sun (1)

 

 

CHOOSE THE CORRECT ANSWER

 

1. Abiotic components are:

 

a) Air, Water, Plants

b) Air, Water, Soil

c) Plants and animals

d ) Soil, Plants, Water

Ans- (c) Plants and animals

 

2. Cactus is a:

a) Desert plant

c) Water Plant

b) Decomposers

d) Herb

Ans-(a) Desert Plant

 

3. The Body of ___________ is streamlined

a) Earthworm

b) Tiger

c) Fish

d) Mountain Bear

Ans- (c) Fish

 

4. Organisms which live in water are called

a) Aquatic

c) Terrestrial Plants

b) Terrestrial

d) Aerial

Ans- a) Aquatic

 

 

VERY SHORT ANSWER QUESTIONS

 

1. Define Habitat

Ans. The place where living things live is called habitat.

 

2. Give 2 examples of terrestrial and aquatic animals

Ans. Terrestrial-Humans, Lions, Cows etc

Aquatic-Fish, Whales, Dolphins

 

3. Define Adaptation

Ans. The ability of living organisms to change themselves according to their surroundings.

 

4. What are producers?

Ans. The organisms that make their own food are called producers such as all green plants.

 

5. What are biotic components of a habitat?

Ans. Living organisms like plants, animals and micro-organisms are biotic components of a habitat.

 

 

 

 

 

SHORT ANSWERS

1. Define Scavengers and decomposers.

Ans. The organisms that eat dead organisms are known as scavengers like Vulture, Dog, Crow.

Micro-organisms that eat dead organisms and decompose them into simple components are known as decomposers like bacteria,fungi .

 

2. What are two adaptive properties of fish?

Ans. a) To reduce water resistance the body of the fish is streamlined.

b) Fish have gills to breathe in water

 

 

3. Which animal is called desert ship? Name two features.

Ans. The camel is called ship of the desert.

Features:

a) No sweat glands to reduce water loss

b) Wide and Padded feet to walk on the sands of the desert

 

4. Differentiate between submerged and floating plants

Ans. Underwater plants are called Submerged plants. Eg- Hydrilla Plants that swim on the surface of the water are known as floating plants. Eg- Lotus

 

LONG ANSWER QUESTIONS

 

1. Comment on:

a) Producers

b) Consumers

c) Decomposers

Ans. a) Producers: The organisms which make their own food are called producers such as all green plants.

b) Consumers: The organisms that cannot make their own food and eat food prepared by other organisms are called consumers such as human, cow etc.

c) Decomposers: The micro- organisms which break up dead plants and animals into simpler substances such as bacteria and fungi.

 

2. Briefly discuss different types of habitat.

Ans. There are three main types of habitat.

1. Terrestrial habitat

2. Aquatic habitat

3. Aerial or Arboreal habitat

1. Terrestrial: The habitat of living things on earth is called terrestrial habitat such as meadows, deserts, mountains, forest etc.

2. Aquatic: The habitat of water animals is called aquatic habitat such as ponds, lakes, sea etc.

3. Aerial or Arboreal: The habitat of organisms which live in air or on trees such as birds, monkey, bats etc.

 

3. Write a note on the interaction of biotic and abiotic components of the habitate

Ans. The biotic and abiotic components of habitat coordinate with each other ,abiotic components such as air, water, soil, sun light etc. are needed for living things to survive. Biotic components maintain a balance of abiotic components.

 

 

4. Differentiate between living and non- living things.

Ans.

LIVING THINGS	NON LIVING THINGS
1.Living things can move.	1. non-living things cannot move.
2. They grow.	2. They do not grow.
3. They need food.	3. They do not need food.
4. They can feel.	4. They can’t feel.
5. They reproduce.	5. They do not reproduce.
6. They breath.	6. They do not breath.
7. For example- human, animals, birds etc.	7. For example- chair, table, pen, books etc.