Kitchen Chemical Changes

What is the difference between a physical change and a chemical change?

• Physical changes create new substances, while chemical changes do not.

• Physical changes do not create new substances, while chemical changes do.

• Both physical and chemical changes create new substances.

• Physical changes are reversible, while chemical changes are not.

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What happens to the molecules during a chemical change?

• They remain unchanged.

• They rearrange to form new substances.

• They break apart into individual atoms.

• They combine with other molecules without changing.

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What is a chemical change?

• A change that results in the formation of new substances.

• A change that can be easily reversed.

• A change that only affects the physical properties of a substance.

• A change that occurs only in living organisms.

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What type of change occurs when a new substance is created?

• Physical change

• Chemical change

• Phase change

• Biological change

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What is the study of matter and its changes called?

• Physics

• Biology

• Chemistry

• Geology

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What causes the holes in a spongey cake after baking?

• Gases being released

• Excessive sugar content

• Too much flour

• Insufficient baking time

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What is an example of a gas being released in a chemical reaction?

• Baking soda reacting with vinegar.

• Dissolving sugar in water.

• Melting ice into water.

• Mixing sand and salt.

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Give an example of a chemical change in cooking.

• Baking bread, where dough rises and changes.

• Boiling water, where it turns to steam.

• Chopping vegetables, which alters their shape.

• Freezing ice cream, which changes its temperature.

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What is the importance of observing changes in matter?

• It helps us understand chemical reactions and properties of substances.

• It allows us to predict weather patterns accurately.

• It is essential for measuring time accurately.

• It helps in determining the age of fossils.

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What is an indicator of a chemical change?

• Change in color, temperature, or the production of gas.

• Change in shape or size without altering the substance.

• A change that can be easily reversed.

• The formation of a solid from a liquid solution.

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