Class 6 Science Chapter 11 Extra Questions Nature’s Treasures
Class 6 Science Chapter 11 Nature’s Treasures Important Extra Questions and Answers
Nature’s Treasures Class 6 Extra Questions Very Short Answer Type
Question 1.
What is moving air called?
Answer:
Wind.
Question 2.
Why is air essential for living organisms?
Answer:
Air is essential for living organisms for their survival. The air what we breathe in has oxygen, which our bodies need to perform its functions and live.
Question 3.
Is the composition of air same everywhere?
Answer:
No, the composition of air not the same everywhere.
Question 4.
What is one of the smart way to conserve water?
Answer:
Water harvesting is a smart way to conserve water,
Question 5.
In Rajasthan, what do people use as water harvesting method? Competency Based Ques.
Answer:
In Rajasthan, people use stepwells, also known as Bawadi for water harvesting.
Question 6.
Define rain water harvesting.
Ans.
In many homes, schools and office buildings, rain water is collected and stored in large quantities, which can be used later on for household chore, watering plants etc. This method of storing water is called rain water harvesting.
Question 7.
When is World Water Day celebrated?
Answer:
22nd March.
Question 8.
Define forests.
Answer:
Forests are large areas covered with dense growth of trees, shrubs and herbs.
Question 9.
Why is soil called nature’s treasure?
Answer:
Soil is called nature’s treasure because it is important for supporting biodiversity. Soil supports the growth of plants and supply them with nutrients and water, which are essential for food production. Soil is also home to many tiny organisms, such as worms and insects.
Question 10.
What is considered as the main source of energy and why?
Answer:
The Sun is the main source of energy as it supports all life on the Earth.
Question 11.
What are fossil fuels? Give examples.
Answer:
Fossil fuels are natural energy sources formed from remains of plants and microorganisms buried deep inşide the earth. The example are coal, petrol, diesel, etc.
Question 12.
What are the main uses of fossil fuels?
Answer:
Fossil fuels are used to generate electricity and they can also be used as a fuel for vehicles.
Question 13.
What alternatives of coal, wood and cow dung, can be used as a fuel for cooking in households?
Answer:
Natural gas and Liquefied Petroleum Gas (LPG).
Question 14.
What are natural resources?
Answer:
The resources which we get from nature are called natural resources.
Question 15.
Give one example of a renewable resource.
Answer:
Air.
Nature’s Treasures Class 6 Extra Questions Short Answer Type
Question 1.
Define and name nature’s treasures.
Answer:
Nature’s treasures refer to the resources provided by the natural environment that are essential for our survival and for making our lives comfortable. Without these treasures of nature, any form of life on Earth is not possible.
Nature’s treasures include air, water, energy from the Sun, soil, rocks, minerals, forests and fossil fuels.
Question 2.
Give two human activities that lead to water pollution.
Answer:
(i) Wastes from homes and industries are dumped into water.
(ii) Throwing plastic and other garbage into rivers or lakes.
Question 3.
Give two methods which can help to reduce water pollution.
Answer:Methods which can help to reduce water pollution are
(i) Reduce plastic use and restrict the throwing of garbage and plastics in the water.
(ii) Avoid dumping of wastes into river.
Question 4.
Write the uses of heat and light from the Sun.
Answer:
The Sun provides heat and light, which are used by the plants to make food and grow, which in turn provide. food and oxygen for animals and humans, as they eat plants for survival. It also helps in drying of clothes, warming up our homes in winters, brightening up our rooms during the day, etc. The Sun also plays an important role in the water cycle, thus influences rainfall pattern.
Question 5.
What is Van Mahotsav and when it is celebrated?
Answer:
Van Mahotsav mean “Tree planting Festivel” and it is celebrated in India every year during the first week of July.
Question 6.
Look at the figure and name the movement depicted in the figure. Explain the importance of this movement. Competency Based Ques.
Answer:
Chipko movement it depicted in given figure. It was a special effect in India that started in early 1970s to save trees and protect forest.
Question 7.
How is soil formed?
Answer:
Soil forms through a process that takes thousands of years. It starts with the disintegration (breaking apart) of rocks into smaller particles by using the energy from the Sun, water and living organisms.
Question 8.
Define rocks and minerals.
Answer:
Rocks are naturally occurring solids composed of one or more minerals.
Minerals are the building blocks of rocks and have distinct properties such as hardness, colour, and shine.
Question 9.
Give two uses of rocks.
Answer:
The two uses of rocks are construction of houses, roads and making tools like hand axes.
Question 10.
What is the role of minerals in our daily life?
Answer:
Minerals like, copper, silver are essential in making electronic devices like phones and computers. Precious minerals like diamonds, gold and silver are used to create jewellery.
Question 11.
What is the full form of CNG and why is it considered as a cleaner fuel for vehicles?
Answer:
CNG stands for Compressed Natural Gas, which is a cleaner fuel for vehicles than petrol or diesel, as on burning it produces less harmful substances and carbon dioxide, which causes global warming.
Question 12.
What are human-made resources? Give two examples.
Answer:
The resources that are created by humans beings are called human-made (man-made) resources. Two examples of human-made resources are, plastic and cars.
Question 13.
Write the differences between renewable and non-renewable resources with examples.
Answer:
The differences between renewable and non-renewable resources are
| Renewable resources | Non-renewable resources |
| 1. They get renewed, replenished or restored within a resonable period of time. | 1. They are found in nature in limited amounts and once used get exhausted. |
| 2. Examples Water, air, sunlight, etc. | 2. Examples Coal, natural gas, petroleum, soil, rocks, minerals, etc. |
Question 14.
How can we conserve natural resources?
Answer:
The practices we can follow to conserve the natural resources are: recycling, reducing waste, planting trees, etc. Use of fossil fuels should be minimized as it is a non-renewable natural resource and burning of these fossil fuels causes air pollution. So, alternative energy sources, like solar energy, wind energy, etc., should be used instead, as they are renewable resources.
Nature’s Treasures Class 6 Extra Questions Long Short Answer Type
Question 1.
Air, which surrounds the Earth, is not made up of a single gas, but it is made up of a mixture of many gases. Support this statement with a diagram.
Answer:
Refer to text on page no. 174.
Question 2.
Explain the use of wind as a source of energy.
Answer:
Refer to text on page no. 174.
Question 3.
Rashi read in her science book that about two-thirds of the total earth’s surface is covered with water, but next day she saw in the news that there is shortage of water in many parts of India. Explain why there is shortage of water even though there is abundant water on earth’s surface?
Answer:
Most of the water is found in the oceans and seas, is saline or salty water. Saline water is not directly usable, as it contains large amount of salt in it which is not fit for drinking, domestic, agricultural and industrial uses. Only a small amount of water on Earth is suitable for all these activities, which is called freshwater. It is in the form of rivers, lakes, ponds, ice sheets or snow and groundwater. We need freshwa
ter for drinking and many other activities, like cleaning, washing clothes and utensils, etc. Freshwater sources are limited, so, when the precious water is wasted and polluted by humans, it leads to a shortage of water in many parts of India.
Question 4.
“Water is our responsibility before it is our right.” Explain the statement. Competency Based Ques.
Answer:
Refer to text on page no. 175.
Question 5.
What are the uses of solar energy?
Answer:
Refer to text on page no. 176.
Nature’s Treasures Class 6 Extra Questions Skill Based
Question 1.
Solve the following crossword puzzle by using the hints given below: Analytical skill :
Hints..
Across :
(ii) The gas that makes up about 21% of air is ________.
(iv) Moving air is called ________.
(v) Metals, like gold and iron are extracted from ________.
Down :
(i) ________ supports the growth of plants and supply them with nutrients and water, which are essential for food production.
(iii) An example of rock used for making table tops and floors.
Abswer:
Question 2.
Research the benefits and challenges of using solar and wind energy as a source of power. Summarize your findings. Research Skill
Answer:
(i) The benefits of solar and wind energy are as follows:
(a) Renewable Both are inexhaustible sources of energy and can be harnessed without depletion.
(b) Environmentelly Friendly They reduce green house gas emissions and do not cause air or water pollution.
(c) Cost-effective over Time Once installed, panels and wind turbines require minimal mainteinance and operational costs.
(ii) The challenges of solar and wind energy are as follows :
(a) Space Requirements Large-scale wind forms and solar power plants require significant land areas.
(b) High Initial Costs The installation of solar panels and wind turbines can be expensive.
(c) Weather Dependent Solar panels need sunlight, and windmills need wind, so don’t always work.
Question 3.
Design an experiment to test and compare the water holding capacity (water retention) of different samples of soils collected from your surroundings. Describe the steps you would take and how you would measure the amount of water each soil type can hold. Experimental Skill
Answer:
Aim To find out which type of soil retains the most water by testing different soil samples.
Material Required Different types of soil, water, measuring cups, water, containers with holes at the bottom, stopwatch, ruler.
Procedure :
(i) Gather small amounts of different soils from your surroundings.
(ii) Label each container with the type of soils you will put in them and fill each container with equal amounts of soils. (about 3/4th)
(iii) Pour a measured amount of water (say 1 cup) into each container.
(iv) Use a stopwatch to measure how long it takes for the water to seep through and start coming out of the holes in the bottom of the container.
(v) After 30 min , check how much water remains in the soil and how much has drained out. Using the ruler, measure the level of water retained in the soil. Compare the results of all the different types observed of soils paper.
Observation We observe that each soil type behaves differently in terms of how much water it can hold/retain.
Conclusion Soil that hold more water will allow less warer to drain out of the bottom.
Note: Clay retains more water, while sand retains the least because of its larger particles. Loam, and garden soil usually have moderate water-holding capacity.
Question 4.
Research the effect of air pollution on human health by interacting with your teacher or locality members and identify the main sources of air pollution. Research Skill
Answer:
(i) The consequences of air pollution on human health are as follows:
(a) The particulates present in air can cause nasal irritation and swelling. It can also cause a runny nose.
(b) The risk of death significantly increases with long term exposure to the polluted air.
(c) Air pollution primarily affects the respiratory system by causing issues like, asthma, reduced lung function and increased risk of respiratory infections.
(ii) Main sources of air pollution are household combustion devices, motor vehicles, industrial facilities and forest fires.
Question 5.
Invertigate some of the traditional rain water harvesting techniques being used in your state. Research skill.
Answer:
Some of the traditional rain water harvesting techniques being used in different states are as follows :
(i) In Rajasthan, people use stepwells, also known as Bawadi. Moreover, now a days, rooftop rain water harvesting method is used.
(ii) In Gujarat, people use stepwells also known as Vav.
(iii) People builts gull and kuls in hilly and mountainous regions to divert water. Mainly in Western Himalayas.