Nature’s Treasures Class 6 Questions and Answers NCERT Solutions
Class 6 Science Chapter 11 Living Nature’s Treasures
Intext Questions
(Page no. 216)
Question 1.
What will happen if the Sun is not visible for a few days?
1. We may have to depend on artificial lighting during day time also.
2. ………………………………….
3. ………………………………….
Answer:
2. With no sunlight, photosynthesis would stop, but that would only kill some of the plants-there are some larger trees that can survive for decades without it.
3. There will be no natural light and heat hence stopping many natural phenomenons like evaporation, transpiration, condensation etc.
(Page no. 217)
Question 2.
What are the consequences of culting a large forest area? Make a presentation or do a role play, or write a story or a poem that shows what could happen if we continue to cut down trees in our forests?
Answer:
The loss of trees and other vegetation can cause climate change, desertification, soil erosion, flooding, increased greenhouse gases in the atmosphere, and a lot of problems for humans.
Presentation/Play/Story or Poem: Do it yourself.
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Question 1.
Fig. 9 shows items related to natural resources. Match them with their jumbled up names. Make another table and write the names of these resources. Classify these resources as renewable or non-renewable.
Answer:
Question 2.
State whether the following statements are True(T) or False(F). If false, correct them.
(i) Nature has all the resources to meet human needs.
(ii) Machines are a resource found in nature..
(iii) Natural gas is a non-renewable resources
(iv) Air is renewable resource.
Answer:
(i) True
(ii) False: Machines are man-made resources.
(iii) True
(iv) False : Air isnon-renewable resource
Question 3.
Fill in the blank using the most appropriate option-
(i) A fuel that is commonly used in two wheelers like scooters or bikes is-
(a) Kerosene
(b) Petrol
(c) Diesel
(d) LPG
Answer:
(b) Petrol
(ii) An example of a renewable resource is-
(a) Coal
(b) Water
(c) Natural gas
(d) Petrol
Answer:
(b) Water
Question 4.
Classify the following as renewable or non-renewable resources: coal, natural gas, forests and minerals.
Answer:
Renewable resources: Forests. Non-renewable resources: Coal, natural gas, minerals.
Question 5.
Why do we say that petroleum is a non-renewable resource?
Answer:
Petroleum is a non-renewable resource because it is present in a limited quantity in nature and can be exhausted by human activities.
Question 6.
It is difficult to regrow forests. Justify this statement.
Answer:
Regrowing forests is difficult because it takes many years for trees to mature. Additionally, the soil may become degraded, losing its nutrients and structure due to deforestation, making it less suitable for new plant growth. Human activities such as urban development and agriculture can also hinder reforestation efforts.
Question 7.
Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.
Answer:
(i) Water: We use water for drinking, washing, cooking and maintaining proper hygiene. We can save water at home by minimising its wastage.
(ii) Diesel: Diesel is used as a fuel in heavy motor vehicles such as buses, trucks, tractors and diesel train engines. We should use electric vehicles.
(iii) Petrol: Petrol is used as a fuel in light motor vehicle such as cars, motorcycles and scooters etc. We should use electric vehicles.
(iv) Natural Gas: It is used as a domestic and industrial fuel. We should use alternative sources of energy.
(v) Water: It is used in homes for drinking, cooking food, washing utensils, cleaning flour, brushing teeth, washing clothes, flushing toilets and watering plants. We can save water by minimising its wastage.
Question 8.
List four activities that are possible due to the presence of air.
Answer:
- Air helps in the dispersal of seats and pollen of flowers of several plants.
- Air is used by human being for respiration.
- Compressed air is used to fill tyres of various kinds of vehicles such as bicycles, scooters, cars, buses, trucks and aeroplanes.
- Blowing air (wind) is used to turn the blades of windmills.
Question 9.
How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
Answer:
- Large cutting of trees should be stopped.
- Plant more seedlings from the deforestated land every year during the rainy season.
- Vana Mahotsav should be observe by planting seedlings in large number.
- Green cover must be protected from insects and pests. The infected trees should be removed or treated with suitable insecticide/pesticide.
Question 10.
In the given illustration, we see that food is being cooked
Answer the following questions-
(i) What type of energy is being used for cooking.
(ii) Name one benefit and one drawback of using this type of energy for cooking.
Answer:
(i) The type of energy being used for cooking in the given illustration is solar energy.
(ii) Benefit
Environmentally Friendly: Solar energy is a renewable and clean source of energy that does not produce pollution or greenhouse gases during use, making it environmentally friendly. Drawback
Dependence on Weather: Solar cooking is highly dependent on weather conditions. It requires sunlight, so it cannot be used during cloudy days or at night, which limits its reliability and convenience.
Question 11.
Cutting down trees on a large scale imports the quality of the soil. Why do you think it is so?
Answer:
Cutting down trees on a large scale impacts the quality of soil. Soil erosion is caused when the trees are cut down on a large scale then the top soil gets exposed and becomes loose because there are no roots to bond soil and no cover to soften the effect of falling rain. Blowing wind and flowing water can then carry away this loose soil easily causing soil erosion.
Question 12.
Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
Answer:
Ways in which human activities pollute the air:
- Smoke emitted from homes by the burning of fuels such as wood, cow dung cakes, coal and kerosene causes air pollution.
- Exhaust gases emitted by automobiles due to burning of petrol and diesel cause air pollution. Action which can help in reducing air pollution: The air pollution from motor vehicles can be reduced by using CNG as fuel in place of petrol and diesel.
Question 13.
A family uses solar panels to generate electricity, a gas stove to cook food and a windmill for pumping water from a well. What would happen if there were no sunlight for a week?
Answer:
In case there were no sunlight for a week, then
- A gas stove will not cook food.
- A windmill being used to run a pump will not draw water from the ground.
Question 14.
Fill up the blanks using the following terms: (fossil fuels, forest, air, petroleum, coal, water and non-renewable resource)
Answer:
Question 15.
There is an increasing demand of trees to meet the requirements of industries and for housing. Therefore trees are being cut. Is it justified? Discuss and prepare a brief report.
Answer:
It is not justified to cut trees to meet the requirements of industries and for housing. If the trees disappear
- The temperature on the earth will increase.
- Animals may migrate due to shortage of food
- Soil will not hold water during rains resulting in floods.
- Valuable products such as timber will not be available.
- Lesser scale cutting of trees would lead to lesser rainfall, increased air pollution and soil erosion.
Question 16.
Propose a plan to use less water in your school. What steps would you take to make this happen and how would it help the environment?
Answer:
Plan to Use Less Water
- Install water-efficient faucets and toilets.
- Fix leaks promptly to prevent water wastage.
- Implement a rainwater harvesting system.
- Educate students and staff on water conservation practices.
In case there were no sunlight for a week, then
- A gas stove will not cook food.
- A windmilll being used to rum a punip will not draw water from the ground.
It is not justified to cut trees to meet the requirements of industries and for housing. If the trees disappear
- The temperature on the earth will increase.
- Animals may migrate due to shortage of food
- Soil will not hold water during rains resulting in floods.
- Valuable products such as timber will not be available.
- Lesser scale cutting of trees would lead to lesser rainfall, increased air pollution and soil erosion.
Plan to Use Less Water:
- Install water-efficient faucets and toilets.
- Fix leaks promptly to prevent water wastage.
- Implement a rainwater harvesting system.
- Educate students and staff on water conservation practices.
- Use grey water for gardening purposes.
Steps to Implement the Plan
- Conduct an audit to identify areas where water is wasted.
- Collaborate with local authorities and experts to install water-saving devices.
- Organise workshops and campaigns to raise awareness.
- Monitor water usage regularly and set reduction targets. Encourage student-led initiatives for water conservation.
Environmental Benefits
- Promotes sustainability and responsible water usage within the community.
- Decreases the energy used in water treatment and distribution.
Activities:
Activity 1.
Aim: To perform a breathing exercise.
Procedure :
- Take a deep breath in, and then breathe out slowly.
- Take a deeper breath in again.
- Hold your breath for as long as you can and then breathe out slowly.
Observations : It is difficult to hold our breath for a long time.
The air which we breathe in has oxygen.
Conclusion: Our body needs oxygen to perform its functions. When we hold our breath for a long time, the body does not get enough oxygen to perform its functions. Thus, we need oxygen for our survival.
The air which surrounds the earth is a mixture of gases.
Activity 2.
Aim: To make a Phi rki (Paper pin wheel)
Materials Required: A square paper of size (15cm x 15cm), a pair of scissors, an all-pin and a soft stick.
Procedure:
- Take a square paper of size 15m x 15cm, a pair of scissors, an all-pin and a soft stick.
- Follow the instruction shown in Fig. 3 to make a Phirki.
- Now, hold the phirki in your hand and run.
Observations : The Phirki rotates.
Conclusion : It is the wind that makes the phirki rotates.
Activity 3.
Table. 1 : Wastage of water in sour daily activities
Conclusion: There are many ways to reduce wastage of water. For example turning of taps when not in use and fixing water leakages.
We pollute freshwater sources by throwing waste materials in them. Waste from home an industries pollute our water sources when it is dumped into them. Polluted water is not fit for consumption by living beings.
As freshwater sources are limited there is a shortage of water in many parts of India. It is important for us to conserve water and use it judiciously. We must also prevent it from being polluted, so that water remains fit for consumption by all living beings.
Activity 4.
Aim : To study the profile of soil at different locations.
Material Required: Towel, magnifying glass.
Procedure :
- Dig the earth of various locations.
- Collect sample of soils from different areas.
- Guess what could be there in different soils.
- Observe carefully each soil sample using magnifying glass and note in colour.
Observations:
| Location from which sample was collected. | What I guessed about the soil. | Observation of soil with naked eye including its colour and texture. | Observation of soil with magnifying lens. |
| Garden construction side. | Dark colour, humus worms. Fine rock particles and humus slightly harder. | Dark colour, humus, worms, soft. Rock particles and humus slightly harder. | Dark colour, humus, worms, soft. Contains very force particles of rock, humus, worms slightly harder. |
| Near the bank of river. | Light colour, soft humus present. | Soft, light colour humus present. | Soft, light colour, humus present. |
Conclusion: The soil samples collected from different places are of different colours and texture.
There are many things with the soil such as sand, insects and worms. Plants and animals also become part of the soil as they decompose and decay. The soil samples collected from different places may be of different colours because they may contain different materials.
Activity 5.
Aim : To conduct a survey of types of vehicles and fuels used.
Procedure: Conduct a survey of vehicles in your neighborhood. Which types of vehicles are there? What type of fuel do they use?
Observations:
| Type of vehicles | Types of fuel used |
| 1. Light motor vehicles (such as cars, motorcycles, and scooter, etc.) | 1. Petrol |
| 2. Heavy motor vehicles (such as buses, trucks, tractors) | 2. Diesel |
| 3. Buses | 3. CNG |
Conclusion: Petrol and diesel are two widely used fuels for vehicles. Petrol, diesel and kerosene are obtained from petroleum. Natural gas is used for cooking and generating electricity.
Activity 6.
Aim : To make a list of activities you do in your daily life and write down the natural resources, that were used.
Procedure:
| Activity | Natural resources |
| Washing clothes | Water |
| Making clay toys | Clay, water, sunlight |
| Collecting firewood | Forest |
| Making kites | Paper wood (Forest) |
| Having breakfast | Fruits chapati (from plants) ( flour, water) |
Conclusion : Many natural resources we use everyday .These resources are air, water, soil and food from plants and animals. We get these resources from nature and also make things using them for our concept. Hence, we must conserve our natural resources and use without wasting them. Thus, we can continue our present needs while also saving for the future.