Chemical and Physical changes 5th grade

What is an example of a physical property?

• Density

• Color

• Temperature

• Pressure

What is a physical change?

• A change that affects one or more physical properties of a substance but does not change its chemical composition.

• A change that alters the chemical structure of a substance.

• A process that results in the formation of a new substance with different properties.

• A change that only occurs at high temperatures.

Can a chemical change be reversed?

• Yes, a chemical change can be easily reversed.

• No, a chemical change cannot be reversed easily, unlike a physical change.

• Yes, but only under specific conditions.

• No, a chemical change can always be reversed.

What is an example of a chemical change?

• Making slime, as it involves a chemical reaction.

• Boiling water, which is a physical change.

• Dissolving sugar in water, which is a physical change.

• Melting ice, which is a physical change.

What is an example of a physical change?

• Cutting hair, as it does not change the chemical structure of the hair.

• Burning wood, which creates ash and smoke.

• Rusting iron, which alters its chemical composition.

• Dissolving sugar in water, which changes its physical state.

What is a chemical change?

• A change that results in the formation of new chemical substances and cannot be reversed.

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

• A change that can be easily reversed to return to the original substance.

• A change that occurs when two substances mix without any reaction.

What is a gas?

• A state of matter that has no definite volume and no definite mass.

• A solid that has a fixed shape and volume.

• A liquid that takes the shape of its container but has a fixed volume.

• A state of matter that has a definite volume but no definite shape.

What is the role of energy in chemical changes?

• Energy is always released during a chemical change.

• Energy has no effect on chemical changes.

• Energy is often absorbed or released during a chemical change, affecting the reaction.

• Energy only affects physical changes, not chemical changes.

What happens to iron when it rusts?

• It undergoes a physical change due to heat exposure.

• It undergoes a chemical change due to the reaction with oxygen and moisture.

• It remains unchanged and retains its properties.

• It transforms into a liquid state when exposed to water.

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

• A physical change alters the chemical composition of a substance, while a chemical change does not.

• A physical change does not alter the chemical composition of a substance, while a chemical change does.

• Both physical and chemical changes do not affect the chemical composition of a substance.

• A physical change is reversible, while a chemical change is not.