Our Environment Book Back Questions 6th Science Lesson 18
6th Science Lesson 18
18] Our Environment
Book Back Questions with Answer and Do You Know Box Content
Do You Know?
Aquarium: Aquarium is a place in which fish and other water creatures and plants are maintained. An aquarium can be small tank, or a large building with one or more large tanks.
Terrarium: Terrarium is a place in which live terrestrial animals as well as plants are maintained. With controlled conditions that copy their natural environment.
Aquariums and Terrariums are used to observe animals and plants more closely. They are also used for decorations.
Creative reuse: Creative reuse or Up-cycling is the process of converting waste materials or useless products into new materials or products of better quality or for better environmental value. When you up cycle, you are giving an item a new purpose, (e.g.) Used tyres into chairs. Used PET bottle into pen stand
How much waste does each person make around the world every day?
The average person in India produces 0.45 kg of waste every day. It may be small amount of waste. But, India has a large population and imagine you collected all the waste today and put it into tractors. You would fill so many tractors that you could create a traffic jam approximately 2,800 kilometres long. Imagine, a road all the way from Kanyakumari to New Delhi completely blocked with tractors carrying garbage and no space to walk in between. This is how much waste we create in India each day! If we reduce the waste, we reduce the pollution. Every day 532 million kilos of solid waste is generated in India.
Choose the best answers:
1. Identify the fresh water ecosystem.
(a) Pond
(b) Lake
(c) River
(d) All of them
2. Producers are _____________
(a) Animals
(b) Birds
(c) Plants
(d) Snakes
3. It is a biodegradable waste
(a) Plastic
(b) Coconut Shell
(c) Glass
(d) Aluminium
4. It is an undesirable change that occurs in air and water
(a) Recycling
(b) Reuse
(c) Pollution
(d) Reduce
5. Usage of chemical pesticides and fertilisers causes ____________ pollution.
(a) Air pollution
(b) Water pollution
(c) Noise pollution
(d) None of the above
Fill in the blanks:
1. Primary consumers that eat plants are called ______________
2. Temperature, light and wind are ____________ factors.
3. _______________ is the process of converting waste materials into new materials.
4. Water pollution can spread ________________ and chemicals.
5. The 3R’s are Reduce, _______________ and Recycle.
State true or false. If false, correct the statement:
1. The Pacific Ocean is an example of a marine ecosystem.
2. Bacteria and fungi are called decomposers.
3. Human and animal wastes are example of non-biodegradable waste.
4. Excessive use of pesticides leads to air pollution.
5. In schools, waste management rules say that we should separate waste in two categories.
Match the following:
1. Biotic factor – Terrestrial Ecosystem
2. Sewage – Land pollution
3. Fertilizers – Air pollution
4. Desert – Water Pollution
5. Smoke – Animals
Arrange the following in a correct sequence and form a food chain:
1. Rabbit 🡪 Carrot 🡪 Eagle 🡪 Snake
2. Human 🡪 Insect 🡪 Algae 🡪 Fish
Answers:
Choose the best answers:
1. Pond, Lake and River 2. Plants 3. Coconut shell 4. Pollution 5. Water Pollution
Fill in the blanks:
1. Herbivores 2. Physical 3. Recycling 4. Diseases 5. Reuse
Say True or False:
1. True
2. True
3. False
Correct Statement: Human and animal wastes are examples of biodegradable wastes.
4. False
Correct Statement: Excessive use of pesticide leads to water pollution.
5. True
Match the following:
1. Animals 2. Water pollution 3. Land pollution 4. Terrestrial Ecosystem 5. Air pollution
Arrange the following in a correct sequence and form a food chain:
1. Carrot🡪Rabbit🡪Snake🡪Eagle
2. Algae🡪Insect🡪Fish🡪Human