Fall Final Chemistry Review

Front

What is the difference between qualitative and quantitative observations?

Back

Qualitative observations describe characteristics or qualities (e.g., color, texture), while quantitative observations involve measurements and numbers (e.g., mass, volume).

Front

Define chemical property.

Back

A chemical property is a characteristic that indicates whether a substance can change to another substance, such as reactivity or flammability.

Front

What does it mean to make observations in science?

Back

Making observations means gathering information on a topic using our five senses: see, hear, taste, touch, and smell.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that is visually distinguishable, meaning its components can be seen and separated.

Front

Convert 78,000 cm to scientific notation.

Back

7.8 x 10^4 cm.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

Define mass.

Back

Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.