S,L,G - PS

If you could see the molecules within a solid, what would you observe?

• molecules flowing past one another, but unable to move far away from one another
• molecules vibrating in place, closely packed
• molecules moving with great energy, far apart from one another
• molecules vibrating and moving far away from one another

A learner wants to overcome the strong attraction between molecules in a liquid. Which action on the system will most likely accomplish this feat?

• increasing the pressure on the system
• decreasing the volume of the system
• Increasing the temperature of the system
• Decreasing the temperature of the system

Based on the heating curve, what happens to the particles within a substance as it changes from a liquid to a gas?

• When changing to a gas, the particles within a substance break free of each other, move randomly and freely, with no defined volume.
• As the temperature decreases, the particle vibrations within a substance increases, causing them to move faster and more freely.
• When changing to a gas, the particles within a substance slide past each other, move randomly and freely, with a defined volume
• Intermolecular forces hold the particles within the substance close together during the phase change. 

According to the heating curve, when a substance is melting, what is happening to the temperature as energy is continually being added it?

• The temperature is increasing as more energy is being added to melt the substance.
• The temperature stays the same as energy continues to be added to melt the substance.
• The temperature is decreasing as more energy is being added to melt the substance.
• The flat curve indicates a change in the temperature allowing for a change in phase.

Select all that apply for a liquid to turn into a solid?

• Temperature drops
• particles slow down
• kinetic energy lowers
• Temperature rises<br />

What term goes on the y-axis? (A)

• Heat(Energy)

• Temperature

• Phase

• Type of Matter

What term goes on the x-axis? (B)

• Heat(Energy)

• Temperature

• Phase

• Type of Matter

What phase of matter exists in part C of the graph?

• Gas

• Liquid

• Solid

• Plasma

What phase of matter exists in part D of the graph?

• Gas

• Liquid

• Solid

• Plasma

What phase of matter exists in part E of the graph?

• Gas

• Liquid

• Solid

• Plasma