Science 8: Unit One Review

Front

What are physical properties?

Back

Physical properties can be observed and measured without changing the matter being studied.

Front

What do the blue numbers in a chemical formula represent?

Back

Subscripts.

Front

What is cohesion?

Back

Cohesion is the tendency of molecules of the same kind to stick to one another.

Front

What type of observation is 'The liquid is pink'?

Back

Qualitative Observation.

Front

Describe cohesion in terms of water molecules.

Back

Cohesion refers to water molecules being attracted to other water molecules.

Front

What is a qualitative observation?

Back

A qualitative observation describes characteristics or qualities that can be observed but not measured.

Front

What is a quantitative observation?

Back

A quantitative observation involves measurements and numerical data.

Front

What is the difference between adhesion and cohesion?

Back

Adhesion is the attraction between different substances, while cohesion is the attraction between the same substances.

Front

What is a coefficient in a chemical equation?

Back

A coefficient indicates the number of molecules or atoms of a substance in a chemical reaction.

Front

What is the significance of subscripts in chemical formulas?

Back

Subscripts indicate the number of atoms of each element in a molecule.