What is the fundamental principle of energy conservation?

• Energy remains constant in an open system.

• Energy is always lost in any process.

• Energy can only be converted from one form to another.

• Energy can be created and destroyed.

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What happens when hydrogen atoms fuse together in the sun?

• They create oxygen.

• They produce nuclear waste.

• They form helium and release energy.

• They absorb light energy.

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How do plants convert sunlight into chemical energy?

• Through combustion.

• Through kinetic energy.

• Through photosynthesis.

• Through nuclear fusion.

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What type of energy transformation occurs when fossil fuels are burned in a car?

• Elastic potential energy to gravitational energy.

• Nuclear energy to light energy.

• Sound energy to heat energy.

• Chemical energy to kinetic energy.

What type of energy is stored in a car's battery?

• Gravitational energy

• Kinetic energy

• Chemical energy

• Electric energy

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What happens to your seat belt when a car slows down?

• It converts kinetic energy to elastic potential energy.

• It converts chemical energy to kinetic energy.

• It converts gravitational energy to sound energy.

• It converts electric energy to heat energy.

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What type of energy transformation occurs when a lamp post falls?

• Elastic potential energy to electric energy.

• Kinetic energy to light energy.

• Chemical energy to nuclear energy.

• Gravitational potential energy to kinetic energy and sound.

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What do we mean by 'energy loss' in a system?

• Energy is converted into useful forms.

• Energy is completely destroyed.

• Energy is converted into less useful forms like heat or noise.

• Energy is created from nothing.

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What principle is observed in any closed system regarding energy?

• Energy is always increasing.

• Energy is always converted to sound.

• Energy is always decreasing.

• Energy is conserved, no matter the form it takes.

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