Phase of Matter

The molecule arrangement of ice, water and steam are very different. _______ has the most ordered arrangement, ______ has the next most orderly arrangement, and ___________ has the least orderly arrangement of molecules.

• ice, water, steam

• steam, water, ice

• water, steam, ice

• water, ice, steam

Tags

NGSS.MS-PS1-4

Relate the temperature of a gas to the kinetic energy of its particles.

• As the temperature extends, the kinetic energy of the particles decreases.

• As the temperature increases, the kinetic energy of the particles increases.

• As the temperature decreases, the kinetic energy of the particles increases.

• As the temperature intensifies, the kinetic energy of the particles decreases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Consider the procedures in a simple experiment used to demonstrate the behavior of gases.

1. Remove the end cap from the tip of a 35-mL plastic syringe.

2. Remove the plunger from the syringe and insert a balloon into the syringe.

3. Place the plunger back in the syringe so the volume reading is approximately at the 15-mL mark.

4. Using a finger, seal the syringe.

5. Pull the plunger out.

Select ALL of the statements that help to explain what occurs once the plunger is pulled out.

• The pressure inside the balloon increases.

• The pressure inside the syringe chamber decreases.

• The lower pressure on the balloon causes its volume to increase.

• When the syringe plunger is pulled out, the amount of gas increases.

• When the syringe plunger is pulled out, the volume of the chamber increases.

How is the volume of a gas related to its concentration of particles?

• As the volume of a contained gas expands, its pressure concentration of particles will increase.

• As the volume of a contained gas extends, its pressure concentration of particles will increase.

• As the volume of a contained gas decreases, its pressure concentration of particles will increase.

• As the volume of a contained gas compresses, its pressure concentration of particles will decrease.

A rock is inside a water-filled balloon. This balloon is resting on the ground in an open field. Which picture correctly depicts the placement of molecules for the rock, balloon and outside of the balloon?

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Tags

NGSS.MS-PS1-1

What is the best conclusion for the events taking place on a molecular level in the images seen here?

• Kinetic energy decreases from left to right. The fourth state, plasma, has the most kinetic energy and the atoms disassociate.

• Heat energy is continuously added at each step. As energy is added, the molecular motion/kinetic energy increases, and matter changes state. In the last state, plasma, enough energy has been added to cause the atoms to disassociate into ions.

• At each step, the state of matter changes. At each step, the molecular motion of the atoms increases because there is a decrease in pressure. During the final step, there is so little pressure that the atoms separate into protons and electrons.

• Matter changes state when there is a change in temperature. In each step, the temperature decreases causing a change in state. At the last state, plasma, the temperature is so low that the atoms cannot stay together and they disassociate into ions.

Tags

NGSS.MS-PS1-4

Students collected a volume of gas in a container (V1) and then applied heat to the container using a flame as seen here. Choose ALL of the statements that could describe what is happening inside the containers from left (V1) to right (V2).

• As the temperature increases, the kinetic energy of the gas also increases.

• An increase in temperature results in an increase in the number of gas particles.

• An increase in gas particle energy causes an increase in pressure exerted by the gas.

• As the pressure exerted by the gas particles increases, the gas volume also increases.

• A decrease in kinetic energy and pressure causes a decrease in the volume of the container.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Dry ice pellets, the solid form of carbon dioxide, were placed in the bottom of this flask. The flask was then covered with a balloon. Within 15 minutes, there was a change in the flask, as seen here. Explain what happened to the CO2 molecules. Which image BEST provides a visual explanation?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A container of gas is held at a constant volume. What is the most reasonable prediction of the graph of pressure and temperature for a gas in this situation?

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Tags

NGSS.HS-PS1-5

A container of gas is held at a constant temperature. What is the most reasonable prediction of the graph of pressure and volume for a gas in this situation?

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