Matter Questions- Concept 1&2

burning

chemical

rotting

chemical

rusting

chemical

Explain the main difference between a compound and a mixture.

A mixture is two or more substances that are physically combined, and a compound is two or more substances that are chemically combined.

Explain the difference between physical properties and chemical properties, and list three examples of each

A physical property can be observed directly or measured without changing the chemical identity of the substance (ex: mass, volume, shape). A chemical property can only be observed or measured by changing the chemical identity of a substance (toxicity, flammability, combustibility).

Explain the difference between physical changes and chemical changes.

Physical change is a change in a substance that only affects its physical properties. Chemical change is a change in a substance that affects it chemical properties thus a chemical reaction occurs and a new substance is formed.

Differentiate between a homogenous mixture and a heterogeneous mixture.

The difference between a homogeneous and heterogeneous mixture is that a homogeneous mixture has even distribution and a heterogeneous mixture has uneven distribution.

Carbon Dioxide

compound

Table Salt

compound

Water

compound

Oxygen

element

Peanut Butter

heterogeneous mixture

Vegetable Soup

heterogeneous mixture

Milk

heterogenous mixture

Lemonade

homogeneous mixture

boiling

physical

crumpling

physical

crushing

physical

evaporating

physical

freezing

physical

sawing

physical

List evidence that a chemical change has occurred.

release of light temperature change odor change sudden color change gas given off sudden appearance of a solid