Nature's Treasures Class 6 - Chapter 11 Curiosity

(Page 227) Fig. 11.9 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.Rock
Forest
Wind
Water

(Page 227) 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.True
Nature provides Air, Water, Sunlight, Forests, Soil, Minerals, Fossil Fuels. All essential for human survival and needs

(Page 227) State whether the following statements are True [T] or False [F]. If False, correct them. (ii) Machines are a resource found in nature.False
Correction : Machines are human-made resources created by humans and not found naturally

(Page 227) State whether the following statements are True [T] or False [F]. If False, correct them. (iii) Natural gas is a non - renewable resource. True
Natural gas is fossil fuel formed over millions of years
Found in limited quantities, making it non-renewable

(Page 227) State whether the following statements are True [T] or False [F]. If False, correct them. (iv) Air is a renewable resource. True
Air we breathe contains oxygen.
This oxygen is continuously generated by plants.
So, Air is a renewable resource

(Page 228) Fill in the blanks using the most appropriate option -(i) A fuel that is commonly used in two wheelers like scooters or bikes is .........
Kerosene
Petrol
Diesel
LPG
Kerosene rarely used in modern vehicles
Petrol used fuel for scooters and bikes
Diesel typically used in heavier vehicles
LPG used for cooking

(Page 228) Fill in the blanks using the most appropriate option -(ii) An example of a renewable resource is ..............
Coal
Water
Natural Gas
Petrol

(Page 228) Classify the following as renewable or non-renewable resources - coal, natural gas, forests and minerals. Renewable Resources:
Forests: Trees can regrow and forests can regenerate naturally
Non-Renewable Resources:
Coal: Fossil fuel formed over millions of years, and once used, cannot be replenished within reasonable time
Natural gas: Fossil fuel found in limited quantities, cannot be regenerated quickly
Minerals: Formed over thousands to millions of years; once extracted and used, cannot be replaced.

(Page 228) Why do we say that petroleum is a non-renewable resource? Petroleum is a fossil fuel
Fossil Fuels take millions of years to form
and they are found in limited quantities.
Fossil Fuels do not get replenished
within a reasonable period of time.
So, Petroleum is a non - renewable resources.

(Page 228) It is difficult to regrow forests. Justify this statement. Reasons why regrowing forests is difficult are:

(Page 228) Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.1. Bathing
Resources used: Water
Reduction methods: Take shorter showers (under 5 minutes)
2. Traveling to school
Resources used: Fossil fuels (petrol/diesel)
Reduction methods: Walk or cycle for short distances
3. Using electricity
Resources used: Coal (for generating electricity)
Reduction methods: Switch off lights and fans when leaving room

(Page 228) List four activities that are possible due to the presence of air.1. Breathing and respiration:
All living beings (Humans and animals) breathe air to get oxygen for survival
2. Wind energy rotating windmills:
Wind(Moving air) rotates windmill wings which generates electricity for homes
3. Flying of kites:
Kites fly when wind pushes against them

(Page – 228) How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken. Actions to enhance green cover are:
1. Care and protection: Watering them regularly
2. Direct planting: Participate in Van Mahotsav programs
3. Use available space: Plant saplings in available open spaces
4. Community involvement: Form eco - club in school for environmental activities

(Page 228) An illustration shows food being cooked using solar energy. Answer the following questions— (i) What type of energy is being used for cooking? Here, Solar energy is being used for cooking

(Page 228) (ii) Name one benefit and one drawback of using this type of energy for cooking. Benefit:
Solar energy is free and unlimited
Does not cause any pollution
Does not require buying fuel like LPG or firewood
Drawback:
Can only be used when there is bright sunlight
Cannot use during cloudy days, rainy season, or at night
Cooking takes longer time compared to gas stove
May not reach very high temperatures for some cooking types

(Page 228) Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so?How cutting trees impacts soil quality:
1. Loss of soil binding:
Tree roots hold soil firmly in place like underground net
When trees cut, roots decay and soil becomes loose
Without roots, soil easily washed away by rain or blown by wind which is called soil erosion
2. Nutrient depletion:
In forests, fallen leaves decay and add nutrients back to soil
This natural recycling enriches soil
When trees cut, this nutrient recycling stops
Soil becomes less fertile over time

(Page 228) Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.Two ways human activities pollute air:
Burning fossil fuels in vehicles causes Air Pollution: How to Reduce – Walk and cycle for short distances (eliminates pollution completely)
Burning coal in thermal power plants causes Air Pollution: How to Reduce – Use solar panel to generate electricity

(Page 228) 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?Solar Panel – If no sun, then no electricity.
Gas Stove – Will continue working, as it works on Natural Gas.
Windmill – Without Sun, Wind speed decreases, due to which windmill will not work.
Overall impact:
Two out of three systems (solar panels and windmill) would face problems
Daily life would become very difficult
which Shows how dependent we are on Sun as main energy source

(Page 229) Fill up the blanks using the following terms - (fossil fuels, forest, air, petroleum, coal, water and non-renewable resource)Fossil Fuels
Non - renewable resource
Air
water
forest
coal
Petroleum

(Page 228) There is an increasing demand of trees to meet the requirements of industries and for housing. Therefore, trees are being felled. Is it justified? Discuss and prepare a brief report. BRIEF REPORT: IS TREE FELLING FOR DEVELOPMENT JUSTIFIED?
1. Arguments for tree cutting:
Growing population needs more houses
Wood required for paper, furniture, construction
Economic development necessary
2. Arguments against unlimited cutting:
Trees take decades to grow, cut in weeks (unsustainable)
Loss of biodiversity and animal habitats
Increases air pollution, reduces oxygen
Soil erosion and water scarcity
Future generations will suffer
Conclusion:
Use alternative materials (steel, recycled products)
Plant more trees than we cut
Use wood efficiently without wastage
Develop technologies reducing forest dependence

(Page – 229) Propose a plan to use less water in your school. What steps would you take to make this plan happen and how would it help the environment?School Water Conservation Plan Steps:
Install water-saving taps that automatically shut off
Place clear reminder signs near all taps
Install rainwater harvesting system on school roof
Form student water monitoring team to check for wastage
Conduct regular awareness programs and competitions
How it helps environment:
Preserves precious freshwater resources for future generations
Saves energy used to pump and treat water
Teaches students responsible resource use habits
Creates lasting conservation culture in community