Keywords and Definitions of Science Chapter 8

1. Natural Resources:
Natural resources are materials or substances that exist naturally on Earth and can be used for economic gain.

2. Renewable Resources:
Renewable resources are natural resources that can be replenished over time through natural processes, such as wind, sunlight, and water.

3. Non-Renewable Resources:
Non-renewable resources are natural resources that are finite and cannot be replenished within a short period of time, such as fossil fuels and minerals.

4. Conservation:
Conservation refers to the sustainable use and management of natural resources to ensure their long-term availability.

5. Pollution:
Pollution refers to the release of harmful substances into the environment that can cause harm to living organisms and their surroundings.

6. Global Warming:
Global warming refers to the long-term increase in the Earth's average surface temperature due to the release of greenhouse gases, primarily carbon dioxide, into the atmosphere.

7. Greenhouse Effect:
The greenhouse effect is the natural process by which greenhouse gases trap heat in the Earth's atmosphere, warming the planet and making it suitable for life.

8. Carbon Footprint:
A carbon footprint is the amount of greenhouse gases, primarily carbon dioxide, emitted by an individual, organization, or product.

9. Sustainable Development:
Sustainable development is the practice of meeting the needs of the present without compromising the ability of future generations to meet their own needs.

10. Ecosystem:
An ecosystem is a community of living organisms and their interactions with their environment.

11. Biodiversity:
Biodiversity refers to the variety of life on Earth, including the diversity of species, ecosystems, and genetic variation.

12. Deforestation:
Deforestation refers to the clearing of forests for commercial or agricultural purposes, leading to the destruction of habitats and loss of biodiversity.

13. Ozone Layer:
The ozone layer is a region of the Earth's stratosphere that contains high concentrations of ozone, which absorbs most of the Sun's ultraviolet radiation.

14. Acid Rain:
Acid rain is a type of precipitation that contains high levels of acidic compounds, primarily sulfuric acid and nitrogen oxides, which can harm the environment and human health.

15. Water Pollution:
Water pollution refers to the contamination of water bodies, such as rivers, lakes, and oceans, with harmful substances, such as chemicals and waste.

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