Class 9 Exam > Class 9 Notes > Biology for Class 9 > Interesting Facts about Nature
Interesting Facts about Nature | Biology for Class 9 PDF Download
Important Points to be remember for Revision
Natural Resources : Class 9 Science
Fossil fuels considered as non-renewable resources because it takes millions of the year for recycle.
Differential heating of earth surface [water & land] causes the wind.
Air is a bad conductor of heat, therefore atmosphere maintains the average temperature of the earth. The atmosphere prevents sudden increase in temperature during day time and during night, it prevents the escape of heat into outer space.
The envelope of air that surrounds our planet earth is called atmosphere. Different layers of atmosphere are :-
(a) Troposphere (b) Stratosphere (c) Mesosphere (d) Thermosphere
Air is inexhaustible natural resource. It is a mixture of gases such as nitrogen, Oxygen and
Carbon dioxide. It also holds water vapours & dust particles. It is essential for life.
World Environment day - 5th June : It was established by UN General Assembly in 1972.
The availability of water decides not only the number of individuals of each species that are able to survive in a particular area, but it also decides the biodiversity of life there.
Besides, the availability of water, other factors like the temperature and nature of soil play significant role in deciding the sustainability of life in a region.
The organic materials present into the soil in the form of decayed dead plant & animal matter, is called humus. Humus makes the soil more porous to allow water and air to penetrate deep in the ground & also increase water holding capacity of soil.
In terrestrial ecosystems, more than 90 percent of the moisture passes through plants by transpiration and only 10 percent evaporates directly from surfaces.
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FAQs on Interesting Facts about Nature - Biology for Class 9
| 1. What are some interesting facts about nature? |  |
Ans. Some interesting facts about nature include:
- The Amazon Rainforest is often referred to as the "lungs of the Earth" because it produces 20% of the world's oxygen.
- Lightning can reach temperatures hotter than the surface of the sun.
- The world's tallest waterfall, Angel Falls, is located in Venezuela and stands at a height of 979 meters.
- The Great Barrier Reef in Australia is the largest living structure on Earth and is visible from space.
- The Earth is the only planet known to have life, thanks to its unique combination of air, water, and land.
| 2. How does nature benefit humans? | |
Ans. Nature provides various benefits to humans, including:
- Clean air and water: Trees and plants help to filter pollutants from the air, while forests and wetlands help to purify water sources.
- Food and resources: Nature provides a wide variety of food sources, such as fruits, vegetables, and grains. It also offers resources like timber, minerals, and medicinal plants.
- Mental and physical health: Spending time in nature has been shown to reduce stress, improve mood, and enhance overall well-being. Nature also provides opportunities for physical exercise and recreation.
- Climate regulation: Natural ecosystems help regulate the Earth's climate by absorbing carbon dioxide and releasing oxygen, thus helping to mitigate climate change.
- Biodiversity: Nature is home to a vast array of plant and animal species, which contribute to the stability and resilience of ecosystems and provide opportunities for scientific discoveries and potential future resources.
| 3. How can we protect nature? | |
Ans. We can protect nature by taking the following steps:
- Conservation and preservation: Preserve natural areas and protected lands, such as national parks and wildlife reserves, to maintain biodiversity and ecosystems.
- Sustainable practices: Adopt sustainable practices in agriculture, fisheries, and forestry to minimize environmental impacts and ensure long-term resource availability.
- Reduce pollution: Minimize pollution by properly managing waste, reducing the use of harmful chemicals, and promoting clean energy sources.
- Education and awareness: Raise awareness about the importance of nature and environmental issues through education, campaigns, and community engagement.
- Responsible consumption: Make conscious choices in purchasing and using resources, favoring products with minimal environmental impact and supporting sustainable businesses.
- Advocate for policies: Support and advocate for policies that prioritize environmental protection, conservation, and sustainable development.
| 4. How does deforestation affect nature? | |
Ans. Deforestation has several negative impacts on nature, including:
- Loss of biodiversity: Deforestation destroys habitat for numerous plant and animal species, leading to a loss of biodiversity and potential extinction of species.
- Climate change: Trees absorb carbon dioxide, a greenhouse gas that contributes to climate change. Deforestation releases this stored carbon back into the atmosphere, exacerbating global warming.
- Soil erosion and degradation: Tree roots hold soil in place, preventing erosion. Deforestation can lead to increased soil erosion, loss of fertility, and reduced agricultural productivity.
- Disruption of water cycles: Trees play a crucial role in regulating water cycles by absorbing and releasing moisture. Deforestation can disrupt these cycles, leading to changes in rainfall patterns, water scarcity, and increased flooding.
- Impact on indigenous communities: Deforestation often affects indigenous communities who depend on forests for their livelihoods, cultural practices, and traditional knowledge.
| 5. How does nature inspire art and creativity? | |
Ans. Nature has been a significant source of inspiration for artists and creative individuals throughout history. Some ways in which nature inspires art and creativity include:
- Aesthetics: The beauty and diversity of natural landscapes, flora, and fauna often serve as subjects for paintings, photography, and sculpture.
- Symbolism and metaphors: Nature's elements, such as the sun, moon, and water, are often used symbolically in literature, poetry, and visual arts to convey emotions, ideas, and themes.
- Patterns and shapes: Nature's intricate patterns, such as the fractal shapes of leaves or the symmetry of flowers, can inspire patterns and designs in textiles, architecture, and decorative arts.
- Colors and textures: The vibrant colors and textures found in nature can inspire artists to explore different color palettes, textures, and techniques in their work.
- Connection and spirituality: Nature's beauty and tranquility often evoke feelings of awe, wonder, and a sense of connection to something greater, inspiring artists to express these emotions through their creations.
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