# Study Guide 2.1 Properties of Matter

Everything is made of matter whether biotic (living) or abiotic (non-living).

Characteristic properties of matter are the same no matter what the size or shape.

When a substance goes through a physical change or change in appearance, its chemical make-up and chemical properties do not change.

Many substances share characteristic properties like melting point, texture, etc. so you may need to study 2 or 3 characteristics to accurately identify a substance.

Possible Essay: Explain the difference between atoms and molecules.

Atoms are the smallest particles of an element. Atoms can combine with other atoms to form molecules. A molecule is a group of atoms that are joined together and act as a single unit.

Molecules can vary in size from just two atoms to billions of atoms. Atoms within a molecule are held together by chemical bonds.

Vocabulary. Be able to define and give examples of each.

Matter

Atom

Element

Molecule

Compound

Chemical bonds

Mixture

Solution

Pure substance

Characteristic property

Physical property

Chemical property

Physical change

Chemical change

States of Matter: solids, liquids, and gases. o

What they look like, volume, shape, how they move (use thermal energy in moving)

Review P21 1-5 Questions and answers.

Review Video Quiz on Properties of Matter

Be able to determine if something is undergoing a

physical or a chemical change

.

Be able to define and understand the following terms:

Mass o

Use a triple beam balance, Units: grams or kilograms

Weight o

Use a scale, Units: pounds

HINT: Know the difference between your weight on Earth and your weight on the moon and your mass on Earth and your mass on the moon (Essay).

Volume o

Solids, cubes – use a metric ruler to measure length x width x height, Units: cm

3 o o

Solids, irregular shape (ex. marble) - use a graduated cylinder, Units: mL

Liquids – use a graduated cylinder, Units: milliliters, liters

Density o

Mass (g) divided by Volume (mL)

# Study Guide 2.1 Properties of Matter

o

Understand that when something is more dense than water (or whatever it is put in), it will sink. If it is less dense, it will float.