What is matter?

• Matter is anything that can be seen with the naked eye.

• Matter is only found in solid form.

• Matter is anything that has mass and occupies space.

• Matter is a type of energy.

Name the three states of matter.

• ice

• solid, liquid, gas

• steam

• plasma

What is the difference between a pure substance and a mixture?

• A pure substance has a uniform composition, whereas a mixture contains multiple substances that can vary in composition.

• A mixture has a uniform composition, while a pure substance can vary.

• A pure substance can be a mixture of different elements.

• A pure substance is always a solid, whereas a mixture can be liquid or gas.

Give an example of a homogeneous mixture.

• Sand

• Saltwater

• Air

• Oil

What is a physical change?

• A physical change alters the chemical composition of a substance.

• A physical change is a change that does not alter the chemical composition of a substance.

• A physical change is a change that cannot be reversed.

• A physical change involves a chemical reaction.

How can we separate a mixture?

• Adding more components to the mixture

• Mixing with a spoon

• Heating the mixture until it melts

• Use methods like filtration, distillation, evaporation, or chromatography.

What is the significance of the boiling point in identifying substances?

• Boiling point only applies to liquids and not solids or gases.

• The boiling point is irrelevant for substance identification.

• All substances have the same boiling point regardless of their properties.

• The boiling point helps identify substances by providing a unique physical property that distinguishes them.

Define the term 'suspension'.

• A suspension is a chemical reaction in a solid.

• A suspension is a mixture where solid particles are dispersed in a liquid or gas.

• A suspension is a gas that has no particles.

• A suspension is a type of solid material.

What are the characteristics of a colloid?

• Colloids always settle at the bottom of a container.

• Colloids are made of solid particles only.

• Colloids do not scatter light and are always clear.

• Colloids have dispersed particles, exhibit the Tyndall effect, do not settle, and can be stable or unstable.

Explain the concept of solubility.

• Solubility is the measure of how much pressure can be applied to a liquid.

• Solubility refers to the temperature at which a substance melts.

• Solubility is the amount of solvent that can dissolve in a solute.

• Solubility is the measure of how much solute can dissolve in a solvent at a given temperature and pressure.