Chemical Properties of Matter

What are the three states of matter?

• plasma, vapor, foam

• solid, liquid, plasma

• gas, liquid, crystal

• solid, liquid, gas

How does temperature affect the state of a substance?

• Temperature changes the state of a substance by increasing its weight.

• Temperature changes the state of a substance by altering its energy and molecular arrangement.

• Temperature has no effect on a substance's state.

• Temperature only affects the color of a substance.

What is a chemical reaction?

• A chemical reaction is a process that only occurs in living organisms.

• A chemical reaction is a process where substances (reactants) are transformed into different substances (products) through the rearrangement of atoms.

• A chemical reaction is the mixing of two substances without any change.

• A chemical reaction is when substances are combined to form a mixture.

What is the law of conservation of mass?

• Mass can be created in chemical reactions.

• Mass is only conserved in physical changes.

• Mass can be destroyed during a reaction.

• Mass is conserved in chemical reactions; it cannot be created or destroyed.

What are reactants and products in a chemical reaction?

• Reactants are the starting materials; products are the substances formed.

• Reactants are always gases; products are always solids.

• Reactants are the final products; products are the initial materials.

• Reactants are the substances that disappear; products are the substances that remain.

What is an example of a physical change?

• Freezing water into ice

• Burning wood to ash

• Melting ice into water

• Dissolving sugar in water

What is an example of a chemical change?

• Melting of ice

• Dissolving sugar in water

• Rusting of iron

• Boiling water

How do catalysts affect chemical reactions?

• Catalysts change the products of the reaction to create new substances.

• Catalysts slow down chemical reactions by increasing activation energy.

• Catalysts are consumed in the reaction and do not affect the outcome.

• Catalysts speed up chemical reactions by lowering activation energy.

What is the difference between an endothermic and exothermic reaction?

• Endothermic reactions absorb heat; exothermic reactions release heat.

• Endothermic reactions release heat; exothermic reactions absorb heat.

• Endothermic reactions are faster than exothermic reactions.

• Endothermic reactions occur only in gases; exothermic reactions occur only in liquids.

What role do chemical bonds play in chemical reactions?

• Chemical bonds are irrelevant to the formation of new substances.

• Chemical bonds only exist in solid materials.

• Chemical bonds have no effect on chemical reactions.

• Chemical bonds are crucial as they determine how atoms interact and rearrange during chemical reactions.