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Questions and Answers
Match the following continents with their correct positions:
Match the following continents with their correct positions:
Asia = Third largest continent Africa = Second largest continent Antarctica = Fifth largest continent Australia = Smallest continent
Match the following natural resources with their correct category:
Match the following natural resources with their correct category:
Water = Renewable resource Fossil fuels = Non-renewable resource Plants = Natural resource Stone = Non-renewable resource
Match the following gases with their correct presence in the atmosphere:
Match the following gases with their correct presence in the atmosphere:
Oxygen = Essential for breathing Nitrogen = Major component of the atmosphere Carbon dioxide = Present in the atmosphere Helium = Not a major component of the atmosphere
Match the following oceans with their correct number:
Match the following oceans with their correct number:
Match the following resources with their correct characteristic:
Match the following resources with their correct characteristic:
Match the following with their correct definition:
Match the following with their correct definition:
Match the following with their correct activity:
Match the following with their correct activity:
Match the following with their correct group:
Match the following with their correct group:
Match the following with their correct feature:
Match the following with their correct feature:
Match the following with their correct characteristic:
Match the following with their correct characteristic:
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Study Notes
Fossils
- Fossils are remains or imprints of ancient plants and animals preserved in rock, revealing insights into prehistoric life.
- Mould fossils occur when mud or sand hardens, leaving an imprint of an organism.
- Cast fossils form when minerals fill in the imprint left by the bones or plants, creating a rock shaped like the original organism.
Fossil Fuels
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Fossil fuels are natural energy sources formed from the remains of ancient organisms, transformed by heat and pressure over millions of years.
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Types of fossil fuels include coal, petroleum, and natural gas.
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Coal
- Used historically in steam engines, cooking, and electricity generation in thermal power plants.
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Petroleum
- Includes liquefied petroleum gas (LPG) for home and industrial fuel.
- Petrol serves as fuel for vehicles and aviation; also utilized in producing detergents, plastics, and fibers.
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Natural Gas
- Compressed natural gas (CNG) is used in power generation, vehicle fuel, and household cooking.
Metals
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Metals possess varying properties that make them essential for everyday use; common metals include copper, gold, silver, iron, and tin.
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Iron
- Used in the production of tools and household appliances such as knives, nails, refrigerators, and dishwashers.
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Gold
- Utilized in jewelry, ornaments, and specialized applications such as spacecraft components.
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Silver
- Found in jewelry, mirrors, batteries, and as an award medal.
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Copper
- Key component for electrical wires, plumbing, motors, and cookware.
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Tin
- Commonly used for food and drink packaging, such as cans.
Understanding Fossils
- Fossils offer historical evidence of extinct life forms, providing insights into their diets based on tooth structure.
- Sharp, pointed teeth indicate carnivory (meat-eating).
- Flat, smooth teeth suggest herbivory (plant-eating).
Earth and its Resources
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Earth, the third planet from the Sun, supports life and is surrounded by an atmosphere that shields against harmful solar radiation.
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Contains seven continents: Asia, Europe, Africa, North America, South America, Australia, and Antarctica; and five oceans: Atlantic, Pacific, Indian, Arctic, and Southern.
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Natural Resources
- Exist independently of human influence; examples: air, sunlight, water, soil, and fossil fuels.
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Renewable vs. Non-renewable Resources
- Renewable resources are infinite and can be replenished, such as forests and wind.
- Non-renewable resources are finite and may deplete over time, including fossil fuels and minerals.
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Mining
- Involves extracting metals and other minerals from the Earth for various applications.
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