Introduction to Matter (TEKS 6.6) Unit Review

States of Matter

100

Made of tiny particles called atoms and molecules.

Matter

200

The 3 states of matter.

Solids, liquids, and gas

300

State of matter that has no definite shape, but does have a definite volume.

Liquid

400

Energy an object has due to the motion of its particles

Kinetic Energy

500

Which state of matter has the highest kinetic energy?

Gas

Pure Substances and Mixtures

100

Two or more substances together in the same place but not chemically bonded

What is a mixture?

200

Matter, either a single element or a single compound, that has definite chemical and physical properties.

Pure Substance

300

A mixture that looks uniform throughout.

Also referred to as a 'solution'

Homogeneous mixture

400

Mixture that does not have a uniform composition throughout.

Heterogeneous

500

Salt water is what type of mixture and why

Homogeneous mixture (solution)

It has uniform composition (looks the same throughout)

Elements and the Periodic Table

100

An element that is shiny and conducts electricity well

Metal

200

An element that is not shiny and does not conduct electricity well.

Nonmetal

300

An element that has properties of a metal and a nonmetal

Metalloid

400

Elements that can be found in the lanthanide series at the bottom of the periodic table, used in electronics, and some have the property of luminescence.

Rare Earth Elements

500

Is Cadmium a metal, nonmetal, or metalloid?

Cd - #48

Metal

Density

100

What is the equation for density?

D=m/V

(Density = mass divided by volume)

200

If an object is less dense than a liquid....will it sink or float?

Float

300

Density of water is 1g/cm³

If Acrylic is 1.25g/cm³ will it sink or float?

Sink

400

What is the density of a substance with a mass of 25g and a volume of 10cm³?

2.5g/cm³

500

Water, sand, and oil are added to a jar.  The oil floats to the top of the water, and sand sinks to the bottom.  Which substance has the least density and which has the most?

Least - oil

Most - Sand

Evidence of Chemical Changes

100

A change in matter, caused by a reaction, that produces one or more new substances

Chemical change

200

A solid that is produced as a result of a chemical reaction in solution

(two liquids put together and they make a solid - what is the solid called)

Precipitate

300

True or False - The release of energy as light or heat is evidence of a chemical change.

True

400

If a substance changes state of matter, but the substance it self does not change.  Is this a physical or chemical change?

Physical

500

Name three of the signs of a chemical change

Change in color, change in odor, gas production, release of energy as light or heat, formation of a precipitate