States of Matter
What are the 3 states of matter?
solids, liquids, and gasses
What are properties of matter?
characteristics that can describe matter.
What is a physical change?
change in matter that can easily be reversed AND does NOT create a new substance
James blows up a balloon as a demonstration in class. Which sentence explains what he is trying to show his class?
a. Air has no weight, which will cause the balloon to float
b. Air is made of very large particles that are invisible.
c. Air is not made of matter and will have no effect on the balloon.
d. Air is made of particles that are very small and cannot be seen.
D- AIR IS MADE OF PARTICLES THAT ARE VERY SMALL AND CANNOT BE SEEN.
The air particles are moving inside the balloon and causing it to expand.
Describe the particle movements in a solid
fixed volume and shape
List 5 different properties of matter.
What is a chemical change?
A change in matter that is difficult to reverse AND creates a new substance
A glass if filled half full of water and half full off ice. The weight of the ice and water is 250 milligrams. Which sentence describes the weight of the water when the ice melts in the glass?
a. it will weigh 250 milligrams
b. It will weigh a little less than 250 milligrams.
c. It will weigh twice as much as 250 milligrams.
d. It will weigh a little more than 250 milligrams.
A! IT WILL WEIGH 250 MILLIGRAMS.
This is correct because the weight of the ice and water is the same; a physical change does not change the amount of matter in the glass
Describe the particle movements in a liquid
Fixed volume but no fixed shape
FREE POINTS!
FREE POINTS!
Describe the indicators of a physical change
phase (or state) change
change in size
change in shape
Danea has a mixture of two solids. One is white and is tiny crystals. The other solid is black and is tiny flakes. She pours water on them. the white solid disappears, and the black solid floats to the top of the water. Which two materials did Danea most likely mix together?
a. salt and pepper
b. milk and iron filings
c. white and black sand
d. sugar and powdered drink mix
A! SALT AND PEPPER
This is correct because salt has the properties of small, white, solid crystals that dissolve in water. Pepper is small, black, solid flakes that do not dissolve in water.
Describe the particle movements in a gas
no fixed volume or shape
FREE POINTS!
Describe the indicators of a chemical change
change in color
change in temperature
change in smell
production of gas (bubbles)
Production of light
Paul has 2 unlabeled containers filled with white powder in his kitchen. He knows one is salt, which dissolves in water. He knows the other is antacid, which forms a new substance in water. In what order should he complete the steps to identify the powders?
Number the steps into the correct order from 1 to 5 with 1 as the first step and 5 as the last step.
-record the results
-make a hypothesis
-observe the water for changes
-place 5 milliliters of water into each of two graduated cylinders
-stir 5 grams of each white substance into each cylinder of water
1. Make a hypothesis
2. Place 5 milliliters of water into each of two graduated cylinders.
3. Stir 5 grams of each white substance into each cylinder of water.
4. Observe the water for changes
5. Record the results
Describe the phase changes that occur due to heating and freezing each phase.
Solid to liquid-- melting (involves heat)
liquid to gas-- evaporation (involves heat)
gas to liquid-- condensation (takes away heat)
liquid to sold-- freezing (takes away heat)
What is conservation of matter? Give an example of how this applies.
Matter cannot be created or destroyed.
If I rip a piece of paper, the same amount of paper exists, it is not just in multiple pieces.
Give an example of a physical change and describe the indicators that tell you it is a physical change.
Give an example of a chemical change and describe the indicators that tell you it is a chemical change.
Answers vary
Tania weights a piece of wood. It weighs 25 grams. Her mother puts in a small steel box and burns it for 5 minutes. Tania notices there is still some wood and a pile of ash left over after burning. Tania weighs the wood again after it has cooled. It now weighs 15 grams. Write the weights of the wood, the burned wood, and the ash in the boxes.
A. Wood =
B. Burned Wood =
C. Ash =
A. Wood = 25 grams
B. Burned Wood = 15 grams
C. Ash = 10 grams