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