Grade 7 Ultimate Q2 BMA Review

Front

What is repetition in scientific experiments?

Back

Repetition refers to conducting the same experiment multiple times to ensure accuracy and reliability of results.

Front

What happens to the temperature of a hot object when placed in cooler water?

Back

The heat will transfer from the hot object to the cooler water, causing the object's temperature to decrease.

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Front

If an object is at 30°C, which temperature indicates the most heat removed?

Back

10°C indicates the most heat removed from the object.

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Front

What occurs when two substances at different temperatures are mixed?

Back

Their temperatures will even out to a common temperature and gradually transition to room temperature.

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Front

How is energy transformed in a battery-powered device?

Back

Chemical energy from the battery is converted into electrical energy, which is then transformed into light energy.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, related to its temperature.

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Front

Define heat transfer.

Back

Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

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Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed; it can only be transformed from one form to another.

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Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact no longer transfer heat to each other, having reached the same temperature.

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Front

Explain conduction.

Back

Conduction is the process of heat transfer through direct contact between materials.