MATTER unit 1 8th grade

Ronnie performed an experiment to measure the temperature of water as he heated it in a pot on the stove. At the end of his experiment, he plotted his results on the graph below.
What properties of Water is Ronnie measuring?

• the volume and thermal conductivity of water

• the solubility and electrical conductivity of water

• the melting and boiling point of water

• the densities and physical states of matter of water

1. Look at the following examples and determine which examples are physical properties and which examples are chemical properties when trying to determine the identify of an unknown solid.

3. 1. place the sample over heat and determine at what temperature it changes state

4. 2. expose the sample to an acid, a base, and water and observe the result

5. 3. measure the volume and mass of the sample and divide them

6. 4. place the sample in contact with oxygen gas and flame and observe the result

• Examples 1, 2, 3 are physical properties

  Example 4 is chemical property

• Examples 2 & 4 are physical properties

  Examples 1 & 3 are chemical properties

• Examples 2 & 4 are chemical properties

  Examples 1 & 3 are physical properties

• Examples 1, 2, 3 are chemical properties

  Example 4 is physical property

In what state of matter do particles move the least ?

• Plamsa

• Gas

• Liquid

• Solid

What will happen to a liquid when it is poured from one container into another container?

• The liquid will keep it's same shape and volume

• The liquid will change it's shape but it's volume will stay the same

• The liquids volume and shape will change

• Liquids will float around freely and leave the container

Correctly label the changes in states of matter

• A. SOLID

  B. LIQUID
  C. GAS

  D. PLAMSA

• A. GAS

  B. LIQUID

  C. PLASMA

  D. SOLID

• A. GAS

  B. SOLID

  C. PLASMA

  D. LIQUID

• A. PLAMSA

  B. SOLID

  C. GAS

  D. LIQUID

Based on the information from the table, what would the particles look like in the states of matter when helium is at

21°C

and

-273°C

CHOOSE 2 ANSWER CHOICES

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Explain what happens to the particles of solid Carbon Dioxide (dry ice)

• The carbon dioxide molecules gain energy and become more tightly bound together

• The carbon dioxide molecules lose energy and become less tightly bound together

• The carbon dioxide molecules gain energy and become less tightly bound together

• The carbon dioxide molecules lose energy and become more tightly bound together.

Ethan is creating two models to show how the effect of adding thermal energy changes the movement of particles in a liquid. Ethan draws a model of a liquid where the particles are allowed to move freely, but the particles only are able to freely slide past past and around each other . Describe what the particles would look like after thermal energy is added to the liquid.

• The particles should be drawn farther apart and moving freely not touching each other to show thermal energy increasing

• The particles should be drawn the same way because thermal energy does not effect particle movement

• The particles should be drawn close together and moving freely to show thermal energy being removed

• The particles should be drawn far apart in a fixed position to show thermal energy being removed

A pot of water is placed on a stove and the burner is turned on. After 15 minutes you return to the stove and what should observe happening to the pot of water?

• a. I should observe water vapor increasing (gaseous water)

  b. the temperature decreasing

  c. kinetic energy (movement) increasing

  d. Liquid water decreasing

• a. Thermal energy increasing

  b. Kinetic energy (movement) increasing

  c. Amount of water vapor (gaseous water) increasing

  d. Liquid water decreasing

• a. Thermal energy is decreasing

  b. Kinetic energy (movement) is decreasing

  c. the amount of water vapor (gaseous water) is decreasing

  d. Liquid water is increasing

• I should not observe any changes to the pot of water

Look at the picture and notice the particles represented by circles in each state of matter have lines on the outside of them. The more lines the particle have on the outside of them the more thermal energy and movement (kinetic energy) they have. What phase change of matter would the thermal energy and movement( kinetic energy) decrease?

• Solid to liquid

• solid to gas

• liquid to gad

• gas to liquid