Class 5 EVS Natural Resources Answer Key & Solutions
Looking for the complete Class 5 EVS Natural Resources Answer Key? In this article, you will find fully solved textbook exercises, including multiple-choice questions, short answers, fill-in-the-blanks, and key study notes for Chapter 19: Natural Resources and Their Conservation.
SCHOLASTIC ASSESSMENT – WORK OUT EXERCISE & ANSWER KEY
Tick (✓) the right answer.
- Recycling is the process of treating things so that they can be….
(a) reused (b) wasted (c) decomposed
Answer: (a) reused
- Afforestation is the act of ……………….. trees.
(a) cutting (b) planting (c) growing
Answer: (b) planting
- Which practice is a measure taken to conserve water?
(a) Composting (b) Crop rotation (c) Rainwater harvesting
Answer: (c) Rainwater harvesting
- Petroleum is a/an ….
(a) vegetable oil (b) edible oil (c) mineral oil
Answer: (c) mineral oil
- Metal ores are found in ….
(a) mountains (b) wells (c) underground mines
Answer: (c) underground mines
Answer the following questions.
- What are renewable and non-renewable resources?
Answer: Renewable resources are natural resources that can be continuously replenished or recycled after use, such as air, water, soil, and forests. Non-renewable resources are resources available in fixed amounts that cannot be easily remade or recycled, taking millions of years to form, such as minerals, coal, and petroleum.
- Explain rainwater harvesting. Why is it needed?
Answer: Rainwater harvesting is the process of collecting rainwater from rooftops and land surfaces and storing/directing it into tanks, reservoirs, or underground aquifers for later use. It is needed to prevent water shortages, recharge falling groundwater levels, and supply clean water during dry seasons/droughts.
- What is soil erosion? How is the soil conserved?
Answer: Soil erosion is the removal or washing away of the top fertile layer of soil by natural agents like running water and wind. Soil can be conserved by:
• Afforestation (planting trees on a large scale).
• Terrace farming and contour farming on hilly slopes.
• Planting windbreaks (rows of trees/bushes) to slow wind speed.
• Practicing crop rotation and mixed cropping.
- Write a few lines on Van Mahotsav.
Answer: Van Mahotsav is an annual tree-planting festival celebrated in India in the first week of July. Its objective is to raise awareness about forest conservation, encourage people to plant trees across the country, restore green cover, and maintain ecological balance.
Fill in the blanks with appropriate words.
- Natural resources can be ……………….. and ……………….. resources.
Answer: renewable, non-renewable
- Soil is the ……………….. layer of the earth.
Answer: uppermost (or top)
- Coal and petroleum are ……………….. fuels.
Answer: fossil
- Water can be conserved by …………………
Answer: rainwater harvesting (or proper usage/avoiding waste)
Write ‘T’ for true and ‘F’ for false statements.
- Water is a renewable resource.
Answer: True (T)
- Contour farming is common in plains.
Answer: False (F) — Contour farming is practiced on hill slopes.
- Mineral oil is called liquid gold.
Answer: True (T)
- We must exhaust our resources.
Answer: False (F) — Resources should be conserved and used judiciously.
- Animal refuse is used to generate biogas.
Answer: True (T)
Unscramble the given words.
- 1 ➔ NON-RENEWABLE
- 2 ➔ VAN MAHOTSAV
- 3 ➔ AFFORESTATION
- 4 ➔ RAINWATER HARVESTING
- 5 ➔ CORBETT NATIONAL PARK
- Match the following.
| Column A | Column B (Correct Match) | Explanation |
| 1. Soil erosion | (c) Overgrazing | Overgrazing strips vegetation cover, leading to soil erosion. |
| 2. Rain | (a) Water harvesting | Rainwater is collected and stored in rainwater harvesting systems. |
| 3. Forests | (e) Habitat | Forests act as the natural habitat for wildlife and plants. |
| 4. Wildlife | (b) Sanctuaries | Wildlife is protected in sanctuaries and national parks. |
| 5. Petroleum | (d) Mineral oil | Petroleum is a non-renewable fossil fuel known as mineral oil. |
KEY POINTS FROM THE CHAPTER
- Definition of Natural Resources: Everything gifted to us by nature that is useful and valuable to humans is called a natural resource (e.g., air, water, soil, forests, wildlife, minerals).
- Types of Natural Resources:
- Renewable Resources: Resources that can be naturally replenished or recycled after use (e.g., air, water, soil, plants, animals).
- Non-Renewable Resources: Resources available in limited quantities that cannot be quickly remade or recycled. They take millions of years to form (e.g., coal, petroleum, metal ores).
- Conservation Measures:
- Soil Conservation: Preventing soil erosion using afforestation, terrace farming, contour farming, windbreaks, crop rotation, and mixed cropping.
- Water Conservation: Practicing rainwater harvesting, turning off taps when not in use, avoiding water pollution, and building dams.
- Forest Conservation: Preventing forest fires and overgrazing, practicing afforestation, and celebrating tree-planting festivals like Van Mahotsav.
- Wildlife Conservation: Establishing national parks and wildlife sanctuaries, banning illegal hunting (poaching), and protecting natural habitats.
- Alternate Energy Sources: Using non-conventional energy like solar cookers/panels, wind energy, hydroelectricity, and biogas to conserve non-renewable fossil fuels.