8Ec Fire safety - Katie Bruce | Biblioteka

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Explain the difference between exothermic and endothermic reactions in terms of energy transfer. Give examples in your answer

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Which of the following is an exothermic reaction?

A. Photosynthesis

B. Combustion

C. Melting ice

D. Boiling water

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What happens during an endothermic reaction?

A. Heat is released into the surroundings.

B. Heat is absorbed from the surroundings.

C. Light is emitted.

D. The temperature decreases because energy is released.

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Which of these is an example of an endothermic process?

A. Freezing water

B. Burning wood

C. Evaporation of water

D. Condensation of steam

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What are the main products of a complete combustion reaction?

A. Carbon dioxide and water

B. Carbon monoxide and oxygen

C. Hydrogen and oxygen

D. Nitrogen and carbon dioxide

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Which of these is NOT required for combustion?

A. Oxygen

B. Heat

C. Fuel

D. Carbon dioxide

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6. The fire triangle consists of:

A. Oxygen, fuel, heat

B. Fuel, water, air

C. Oxygen, water, heat

D. Heat, air, carbon dioxide

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7. Which of these actions can break the fire triangle?

A. Adding more fuel

B. Removing heat

C. Increasing oxygen supply

D. Mixing water with fuel

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8. What type of fire extinguisher is used for electrical fires?

A. Water extinguisher

B. Foam extinguisher

C. Carbon dioxide extinguisher

D. Wet chemical extinguisher

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9. Which fire extinguisher is used for cooking oil fires?

A. Foam extinguisher

B. Dry powder extinguisher

C. Wet chemical extinguisher

D. Water extinguisher

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10. Why should water extinguishers NOT be used on electrical fires?

A. They are not strong enough to put out the fire.

B. Water conducts electricity and can cause electrocution.

C. Water reacts with electricity to create heat.

D. Water is too expensive to use.

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Stavka koja se može prevući		Odgovarajuća stavka
photsynthesis		exothermic
neutralisation reaction		endothmeric

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Stavka koja se može prevući		Odgovarajuća stavka
energy enters from the surroudings		exothermic
energy escapes to the surrounding		endothermic