states of matter phet simulation
directions:
1. open the phet simulation here.
https://phet.colorado.edu/sims/html/states - of - matter - basics/latest/states - of - matter - basics_en.html
2. start on the “phase changes” tab and begin by changing the molecule option to water and the temperature setting to celsius.
3. change the water to a solid (ice). manipulate the temperature to below 0 °c. describe how the molecules are moving in the table.
4. solid water (ice) melts at 0°c. begin heating the water until it hits that point. complete the table below for the solid phase
5. water boils at 100 degrees celsius. continue heating the water up until that point. describe how the molecules are moving below in the table.
6. now decrease the temperature and observe the way the molecules behave.
7. once you have come explore the solid/liquid/gas states and draw how they appear below.
1. as you complete the simulation, fill in the table.
| solid | liquid | gas |
|--|--|--|--|--|--|
| describe what you observe is happening. | the ice became a liquid at ____ °c | the water became a gas at ____ °c |
| describe how the molecules are moving. | describe what you observe is happening. | describe what you observe is happening. |
| | describe how the molecules are moving. | describe how the molecules are moving. |

Question

Accepted Answer

# Explanation:
## Step1: Recall phase - change temperatures
Water melts from solid (ice) to liquid at 0°C and boils from liquid to gas at 100°C.
## Step2: Describe molecular motion in solid
In solid ice, the water molecules are in a fixed, ordered pattern and vibrate in place.
## Step3: Describe molecular motion in liquid
In liquid water, the molecules are more free - flowing, can slide past each other, and have more kinetic energy than in the solid state.
## Step4: Describe molecular motion in gas
In water vapor (gas), the molecules are moving rapidly in all directions, are far apart from each other, and have high kinetic energy.

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QUESTION IMAGE

Question

Explanation:

Step1: Recall phase - change temperatures

Step2: Describe molecular motion in solid

Step3: Describe molecular motion in liquid

Step4: Describe molecular motion in gas

Answer:

solid	liquid	gas
describe how the molecules are moving.	describe what you observe is happening.	describe what you observe is happening.
	describe how the molecules are moving.	describe how the molecules are moving.

Solid	Liquid	Gas
The molecules are in a fixed, ordered pattern and vibrate in place.	The molecules are more free - flowing and can slide past each other.	The molecules are moving rapidly in all directions, are far apart.
The molecules vibrate in place.	The molecules move around more freely compared to the solid state.	The molecules move very quickly in random directions.