MCQ on Natures Treasures Class 6
Class 6 Science Chapter 11 MCQ Natures Treasures
Multiple Choice Questions :
Question 1.
Which of the followng gas do we use in breathing.
(a) Carbon dioxide
(b) Nitrogen
(c) Oxygen
(d) None of these
Answer:
(c) Oxygen
Question 2.
Which does not help in the movement of which of the following.
(a) Firki
(b) Weather cock
(c) Ceiling fan
(d) Sailing Yacht
Answer:
(c) Ceiling fan
Question 3.
What is the primary use of windmills?
(a) To generate electricity
(b) To produce wind
(c) To cook food
(d) To clean clothes
Answer:
(b) To produce wind
Question 4.
Which of the following practices helps in conserving water?
(a) Leaving the tap open while brushing teeth
(b) Using a bucket instead of a shower
(c) Taking long showers
(d) Washing clothes with running water
Answer:
(b) Using a bucket instead of a shower
Question 5.
What is the main source of energy for plants?
(a) Water
(b) Soil
(c) Air
(d) Sunlight
Answer:
(d) Sunlight
Question 6.
What is a major impact of air pollution on health?
(a) Improved respiratory function
(b) Reduced risk of lung disease
(c) Increased risk of respiratory problems
(d) None of the above
Answer:
(c) Increased risk of respiratory problems
Question 7.
What does the term ‘recycling’ refer to?
(a) Throwing away waste materials
(b) Reusing materials for the same purpose
(c) Burning waste materials
(d) Converting waste materials into new products
Answer:
(d) Converting waste materials into new products
Question 8.
What is one benefit of using solar energy?
(a) It increases greenhouse gas emissions
(b) It is a non-renewable resource
(c) It reduces dependency on fossil fuels
(d) It causes air pollution
Answer:
(c) It reduces dependency on fossil fuels
Question 9.
Which energy source is considered clean and does not pollute the environment?
(a) Natural gas
(b) Coal
(c) Wind energy
(d) Petrol
Answer:
(c) Wind energy
Question 10.
What is the main effect of deforestation on the environment?
(a) Increased soil fertility
(b) Enhanced biodiversity
(c) Decreased oxygen levels
(d) Improved water quality
Answer:
(c) Decreased oxygen levels
Question 11.
Which of the following is NOT a benefit of planting trees?
(a) Reducing soil erosion
(b) Increasing carbon dioxide levels
(c) Providing habitat for wildlife
(d) Improving air quality
Answer:
(b) Increasing carbon dioxide levels
Question 12.
Why is recycling paper important?
(a) It reduces the need for cutting down of more trees
(b) It makes paper more expensive
(c) It increases waste production
(d) It uses more water and energy
Answer:
(a) It reduces the need for cutting down of more trees
Question 13.
Which of the following is a benefit of using public transportation?
(a) Increases air pollution
(b) Reduces the use of fossil fuels
(c) Causes traffic jam
(d) Increases personal vehicle use
Answer:
(b) Reduces the use of fossil fuels
Question 14.
Which of the following is a non-renewable resource?
(a) Sunlight
(b) Wind
(c) Coal
(d) Water
Answer:
(c) Coal
Question 15.
What is the main benefit of using renewable resources over non-renewable resources?
(a) They are cheaper
(b) They are less abundant
(c) They do not deplete over time
(d) They are easier to find
Answer:
(c) They do not deplete over time
Question 16.
Which of these is NOT a natural resource?
(a) Water
(b) Forests
(c) Plastic
(d) Air
Answer:
(c) Plastic
Question 17.
Which of the following is a renewable resource?
(a) Coal
(b) Petrol
(c) Wind
(d) Natural Gas
Answer:
(c) Wind
Question 18.
How can planting trees help in conserving natural resources?
(a) By increasing pollution
(b) By reducing soil erosion
(c) By depleting groundwater
(d) By creating more waste
Answer:
(b) By reducing soil erosion
Question 19.
What is the main source of energy used by plants to grow and prepare food?
(a) Wate
(b) Soil
(c) Sunlight
(d) Air
Answer:
(c) Sunlight
Question 20.
What does soil provide to plants?
(a) Energy
(b) Shelter
(c) Nutrients and support
(d) Water only
Answer:
(c) Nutrients and support
Question 21.
Which natural resource can be described as having limited availability and takes millions of years to form?
(a) Fossil fuels
(b) Solar energy
(c) Wind
(d) Water
Answer:
(a) Fossil fuels
Question 22.
Which of the following energy sources is considered non-renewable?
(a) Coal
(b) Petrol
(c) Natural gas
(d) All of these
Answer:
(d) All of these
Fill in the Blanks :
1. The primary component of air that is essential for breathing is. ______.
Answer:
oxygen
2. The gas that makes up about 78 % of air is ________.
Answer:
nitrogen
3. _______ uses wind to generate electricity.
Answer:
Windmills
4. Using _______ panels helps in converting sunlight into electrical energy.
Answer:
solar panels
5. _______ is a method of collecting and storing rainwater for future use.
Answer:
Rain water harvesting
6. The natural resource that is used to produce electricity through burning is called _______.
Answer:
fossil fuel
7. _______ is considered a renewable resource because it is continuously replenished by the Sun.
Answer:
Solar energy
8. Air is made up of _______ of gases.
Answer:
mixture
9. Water found in _______ and seas are not fit for drinking.
Answer:
oceans
10. Kerosene is an example of _______.
Answer:
fossil fuels
True/False :
1. The atmosphere is composed primarily of oxygen and carbon dioxide.
Answer:
False
2. Water is considered a renewable resource.
Answer:
True
3. Solar panels can only generate electricity during the night.
Answer:
False
4. Fossil fuels such as coal and petrol are examples of non-renewable resources.
Answer:
True
5. Granito and gold are examples of rocks.
Answer:
False
6. The Sun do not play a role in the water cycle.
Answer:
False
7. Rocks are made up of minerals.
Answer:
True
Match the Columns :
1. Unjumble the jumbled words in column I and then match the column I with column II.
| Column I | Column II |
| A. CORKS | 1. Large areas covered with dense growth of trees. |
| B. ORSLA KCOERO | 2. Solids made up of minerals. |
| C. NDIW | 3. Generate electricity in windmills. |
| D. RSFEOST | 4. Uses solar energy for cooking. |
| E. LOISFS EFLUS | 5. Used as a fuel for vehicles. |
Answer:
| Column I | Column II |
| A. CORKS | 2. Solids made up of minerals. |
| B. ORSLA KCOERO | 4. Uses solar energy for cooking. |
| C. NDIW | 3. Generate electricity in windmills. |
| D. RSFEOST | 1. Large areas covered with dense growth of trees. |
| E. LOISFS EFLUS | 5. Used as a fuel for vehicles. |
2. Match the Column I with Column II.
| Column I | Column II |
| A. Solar water heater | 1. Wind |
| B. Windmill | 2. Minerals |
| C. Electronic devices | 3. Rocks |
| D. Construction of houses | 4. Sun |
Answer:
| Column I | Column II |
| A. Solar water heater | 4. Sun |
| B. Windmill | 1. Wind |
| C. Electronic devices | 2. Minerals |
| D. Construction of houses | 3. Rocks |
Assertion-Reason :
The following questions consist of two statements. Assertion (A) and reason (R). Answer these questions selecting the appropriate option given below.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but the R is false.
(d) A is false, but the R is true.
1. Assertion (A) Wind energy is a renewable resource. Reason (R) Wind is replenished naturally and does not deplete over time.
Answer:
(a) Both A and R are true, and R is the correct explanation of A.
2. Assertion (A) Solar panels work effectively on cloudy days.
Reason (R) Solar panels uses sunlight to generate electricity.
Answer:
(d) A is false, but the R is true. Solar panels do not work effectively on cloudy days as they require direct sunlight to generate electricity.
3. Assertion (A) Fossil fuels are finite and take millions of years to form.
Reason (R) Fossil fuels are a sustainable source of energy.
Answer:
(c) A is true, but the R is false. Fossil fuels are not a sustainable source of energy because they are non-renewable resources and their use harms the environment due to release of harmful gases, that contribute to climate change and causes air pollution.
Direction The following questions consists of two statements, Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false
(d) A is false, but R is true
1. Assertion (A) The composition of air is constant everywhere.
Reason (R) The air contains nitrogen gas as the major component.
Answer:
(d) A is false, but R is true
2. Assertion (A) Rainwater harvesting helps in conserving water.
Reason (R) Rainwater harvesting collects and stores rainwater for use during dry periods, reducing the demand on other water sources.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
Case Based Questions :
1. Read the given passage and answer the following questions.
Look at a picture of a windmill farm. The picture shows several tall windmills with large wings rotating in the wind. The windmills uses wind energy, which can help reduce pollution. Competency Based Que.
Question i.
What is the primary function of the windmills?
(a) To pump water
(b) To generate electricity from wind
(c) To provide şhade
(d) To filter air
Answer:
(b) To generate electricity from wind
Question ii.
What is one benefit of using wind energy mentioned in the case study?
(a) It increases air pollution
(b) It requires a lot of water
(c) It reduces dependence on fossil fuels
(d) It leads to deforestation
Answer:
(c) It reduces dependence on fossil fuels
2. Read the given passage and answer the following questions.
A city in India, often faces water shortages during the summer months. To help address this issue, city has introduced water conservation practices. These efforts are made to ensure that there is enough water for everyone and to reduce wastage.
Question i.
What are the activities that leads to wastage of water in the city?
Answer:
Water can be wasted through activities like leaving the tap running, over-watering plants or using water carelessly.
Question ii.
What are water conservation practices mentioned in the case study that city has adopted?
Answer:
Water’conservation practices that the city has adopted are: fixing leaks, turning off the taps when not in use, recycling water, water harvesting and spreading awareness among the residents of city regarding importance of water.
Question iii.
Why is it important to use water wisely?
Answer:
It is important for residents to use water wisely to ensure that there is enough water for everyone and to prevent shortages.
3. Read the given passage and answer the following questions.
Sahil and his family went to a forest and while walking his mother told him that forests are one of the nature’s treasures, but unfortunately the number of forests are decreasing, which is a reason for concern. This made Sahil curious and he asked these questions to his mother. Answer them briefly.
Question i.
Why forests are called as one of the nature’s treasures?
Answer:
Forests play a crucial role in our environment.
- They produce oxygen, which is essential for humans and animals to breathe.
- They also help in regulating the climate by absorbing carbon dioxide.
- Many products that we use in daily life like, paper, wooden table and chair, etc., are also obtained from forests.
- Forests are a natural home for many species of plants and animals, including, birds and insects and they provide food and shelter to them.
Because of these uses, forests are considered a nature’s treasure.
Question ii.
Why are the number of forests decreasing?
Answer:
The number of forests are decreasing because forests are being cut down due to an increasing demand of trees to meet therequirements of industries and for housing.
Question iii.
What are the consequences of the decrease in number of forests?
Answer:
The consequences of the decrease in number of forests are:
- Without trees and their roots to hold the soil, the soil can be washed away, thus, soil erosion can occur, leading to poor soil quality.
- The loss of forests can also disrupt the water cycle, leading to reduced rainfall and water shortages in some areas.
- Cutting down of trees also leads to the loss of habitat for many species, which can result in the disappearance (extinction) of plants and animals.
Question iv.
How can we protect and preserve the forests?
Answer:
Some ways to protect and preserve the forests are:
- Reduce cutting down of trees.
- Planting new trees in areas where forests have been cut down helps to restore lost forests (Reforestation).
- Spread awareness about the importance of forests and encourage others to take action to protect them.
4. Read the given passage and answer the following questions.
In a small town, residents use fossil fuels like coal, petrol, and natural gas to power their homes and vehicles. Coal is burned in power plants to generate electricity, petrol is used to fuel cars, and natural gas is used for cooking and heating. However, the town is learning that using fossil fuels can contribute to pollution and climate change. The community is exploring ways to use cleaner energy sources like wind and solar power to reduce their reliance on fossil fuels.
Question i.
Are fossil fuels considered as renewable or non-renewable resources? Why?
Answer:
Fossil fuels are considered as non-renewable resources as they are available in limited quantities and we will run out of them if we keep using them at rate we are currently using, as it takes thousands of years for their formation.
Question ii.
How fossil fuels contribute to air pollution and climate change?
Answer:
Fossil fuels when burnt, produces smoke and carbon dioxide (CO<sub>2</sub>) gas, which significantly pollutes the air and the released carbon dioxide is a major greenhouse gas, which causes global warming. The over use of fossil fuels, particularly for transportation and heating, has led to serious air pollution problems. For example, cars, buses and trucks that run on petrol or diesel emit pollutants. Similarly, burning coal for domestic use also releases pollutants into the air. This pollution can have harmful effects on health, causing respiratory problems like asthma and bronchitis. It can also contribute to global warming leading to climate change and extreme weather conditions.
Question iii.
Why is the town considering to use cleaner energy sources like wind and solar power?Competency Based Que.
Answer:
The town is considering to use cleaner energy sources like wind and solar power to reduce our dependence on fossil fuels, and reduce pollution and climate change problems caused by the use of fossil fuels.
5. Read the given passage and answer the following questions.
Modern School, located in a town, decided to install solar panels on the roof of their school building. Students like Raj and Maya were excited to learn about how solar panels work and how they can help the environment. The school also organized a workshop for students to understand the benefits of solar energy. Competency Based que.
Question i.
What was one of the goals of installing solar panels at Modern School?
(a) To increase school fees
(b) To reduce the school’s electricity bills
(c) To build a new playground
(d) To purchase new computers
Answer:
(b) To reduce the school’s electricity bills
Question ii.
What is a primary benefit of using solar panels mentioned in the case study?
(a) They create more waste
(b) They help reduce dependence on fossil fuels
(c) They increase energy consumption
(d) They need frequent repairs
Answer:
(b) They help reduce dependence on fossil fuels