Show:
Matter Basics
Density
States of Matter
Phase Changes
Atoms
100

Name a homogeneous mixture

Salt water, sugar water, scrambled eggs, etc

100
What is Density
How much (matter, mass) stuff there is in some amount of space. D=M/V
100

Which state/phase of matter has a definite shape.

Solid because its molecules are so close and compact that the shape will be definite.

100
What is the name of the phase change when a SOLID becomes a LIQUID?
Melting
100

What charge does a proton, electron, and neutron have?

positive, negative, neutral

200

Name the states of matter

Solid, liquid, gas, plasma

200

How do you calculate density? and What are the units.

D= mass (in grams or g) divided by volume (in mL or cm3) Units of Density: g/cm3 OR g/mL

200

Which state/phase occupies space?

All three states/phases occupy space. Remember, all matter occupies space (aka volume) and has mass.

200

What is the name of the phase change when a LIQUID becomes a GAS?

Evaporation or Boiling. When you have water boiling, forget about it, come back to find an empty pot. The water evaporated.

200

Where are the protons located?

Nucleus, center

300

Is chicken noodle soup a heterogeneous or homogeneous mixture?

Heterogeneous, you can see the separate pieces, not consistent throughout.

300

How can you find the volume of an irregular object?

Measure the water displacement. Measure how much water rises in a graduated cylinder when you drop the object in.

300
Which state(s) does not have a definite shape?
Gas. The gas molecules are able to be by themselves floating around. They can all be in a place like a balloon, for example, but its not the gas that forms the balloon shape ... its the balloon's stretchy qualities that gives it shape.
300

What is the name of the phase change when a GAS becomes a LIQUID? Give an example.

Condensation A glass of ice water becomes "Sweaty"

300

Where are the electrons located?

Outside the nucleus

400
Water is placed into the freezer to make ice. Is this a physical or chemical change?
Physical because nothing new was created... remember you can get your water back!
400
Which of the following has a GREATER density: water 1.0g/mL OR Silver 10.50g/cm3
Silver because it has a greater mass per unit of volume. Remember... the greater the number (when comparing densities) the greater the density.
400
Which states DO have a definite volume?
Solid and liquid.
400

What is the name of the phase change when a SOLID skips the liquid phase and becomes a GAS? AND Give one example.

Sublimation DRY ICE!!!

400

Carbon has an atomic number of 6 and a mass of 12. How many protons and electrons does it have?

6 each

500
It is your birthday and your mother makes you breakfast. She made for you scrambled eggs and baked you a cake. Were these physical or chemical changes?
These are both chemical. Something new was created. You can't get the original (what you started with back!)
500
You have a graduated cylinder with 25 mL of water (density is 1.0 g/mL). You also have a another liquid (or substance) with a density of .45 g/mL ..... which one will be the top layer once you pour both into cylinder?
The liquid with density of 0.45g/L because it has a LOWER density than that of water. Remember, the greater the number the more dense. That means more mass per one unit of volume (space).
500
Which phase(s) DO NOT have a definite volume?
Gas.
500

What phase changes are in the water cycle?

Evaporation: liquid water to gaseous water

Condensation: Gas to liquid to form clouds & precipitation

500

Nitrogen has an atomic number of 7 and an atomic mass of 14. How many neutrons does it have?

7