Nature's Treasures

Nature's Treasures – Activity & Review Page

Activity 11.3: Wastage of Water

Activity	How is water wasted?	Ways to reduce wastage
Hand washing	Leaving tap open	Use a mug; turn off tap while scrubbing
Washing clothes	Using too much water	Wash in batches; use water-efficient machines
Washing utensils	Continuous running tap	Use a basin of water instead
Taking shower	Long duration and high flow	Install low-flow showerheads; time limit
Cooking	Discarding unused water	Reuse for watering plants
Gardening	Excess watering	Use drip irrigation; water early morning

Activity 11.5: Vehicle Fuel Survey

Type of Vehicle	Type of Fuel Used
Motorcycle	Petrol
Auto Rickshaw	CNG
Car	Petrol/Diesel
Bus	Diesel
Bicycle	Human Energy 😄

Answers to Exercises

Q1: Match and classify resources

Item	Correct Name	Type
ocrk	Rock	Non-renewable
refost	Forest	Renewable
ndiw	Wind	Renewable
atwre	Water	Renewable

Q2: True/False

• Nature has all the resources to meet human needs. ✅ True
• Machines are a resource found in nature. ❌ False — Machines are human-made resources
• Natural gas is a non-renewable resource. ✅ True
• Air is a renewable resource. ✅ True

Q3: Fill in the blanks

• (i) Petrol
• (ii) Water

Q4: Classify resources

• Coal – Non-renewable
• Natural Gas – Non-renewable
• Forests – Renewable
• Minerals – Non-renewable

Q5: Why is petroleum non-renewable?

Because it takes millions of years to form and cannot be replenished quickly.

Q6: It is difficult to regrow forests. Justify this statement.

Forests take many years to grow and restore biodiversity. The variety of trees and life forms cannot be regenerated quickly, and cutting them down disrupts ecosystems and food chains. Natural regeneration needs time, protection, and favorable conditions.

Q7: List five daily activities using natural resources & suggest ways to reduce use.

Activity	Resource Used	Ways to Reduce Use
Bathing	Water	Shorter showers; bucket instead of shower
Using fan/light	Electricity (Sun/fossil fuel)	Use natural light; turn off when not in use
Eating food	Water, soil, sunlight	Reduce food waste; eat local produce
Commuting	Fossil fuel	Use bicycle or public transport
Washing clothes	Water	Wash full loads; use water-efficient machine

Q8: Four activities possible due to presence of air

• Breathing
• Flying kites or airplanes
• Drying clothes in wind
• Generating electricity via windmills

Q9: How can you enhance the green cover of your locality?

• Plant native trees and shrubs
• Organize tree-planting drives with schools and communities
• Avoid cutting trees unnecessarily
• Reuse paper and wood products
• Create awareness through eco-clubs

Q10: Cooking with solar energy

• Type of energy used: Solar energy
• One benefit: Eco-friendly and renewable source
• One drawback: Depends on availability of sunlight

Q11: Why does cutting down forests affect soil quality?

Tree roots hold soil in place and prevent erosion. Fallen leaves enrich soil with nutrients through decomposition. Without trees, soil becomes loose, dry, and nutrient-poor.

Q12: Air pollution causes and solution

• Causes:
  • Vehicle emissions
  • Burning waste and fossil fuels
• Solution: Promote cycling, use public transport, plant more trees

Q13: What if there's no sunlight for a week?

Solar panels won’t generate power, solar cookers and heaters won't work, and plants may suffer due to lack of photosynthesis. We'd depend more on non-renewable energy.

Q14: Fill up classification of resources

Renewable Resources	Non-renewable Resources
Air	Petroleum
Water	Coal
Forest	Fossil Fuels
Natural Gas	Minerals

Q15: Is cutting trees for industries justified?

Not always. While some industries depend on wood, excessive cutting leads to deforestation and loss of biodiversity. Alternatives like sustainable farming and recycled materials should be promoted. Balance is essential.

Q16: Plan to reduce water usage in school

• Install push taps to control flow
• Fix leakages promptly
• Use harvested rainwater for cleaning/gardening
• Raise awareness through posters and campaigns
• Monitor usage monthly and report savings