Big Idea #5: Structure & Properties of Matter Part 1

When balancing a chemical equation, it is okay to change the subscripts.

• True

• False

carbonated soft drink w/ bubbles

• heterogeneous

• homogeneous

sugar water

• homogeneous

• heterogeneous

soil

• mixture

• pure substance (element)

• pure substance (compound)

water

• pure substance (compound)

• pure substance (element)

• mixture

nitrogen

• pure substance (element)

• pure substance (compound)

• mixture

pure gold

• homogeneous matter

• pure substance

• element

• all of these are true.

A _____ is any matter that has a fixed composition & definite properties. (exs. = elements & compounds)

• pure substance

• mixture

A _____ is a combination of more than one pure substance. The composition is NOT fixed. (exs. = grape juice: water, sugars, acids, & vitamins & air: nitrogen, oxygen, argon, carbon dioxide, etc.)

• mixture

• pure substance

Homogeneous

• salt + water

• sugar + water

• alcohol + water

• All of these are correct.