KMT & Matter

How does temperature affect the kinetic energy of particles in a substance?

• Kinetic energy is independent of temperature.

• Temperature directly affects the kinetic energy of particles; higher temperature means higher kinetic energy.

• Temperature has no effect on kinetic energy.

• Lower temperature increases kinetic energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What are the three main states of matter?

• plasma, vapor, foam

• solid, liquid, plasma

• solid, liquid, gas

• gas, liquid, crystal

Tags

NGSS.MS-PS1-4

Describe the characteristics of solids in terms of particle arrangement.

• Particles are arranged in layers and can flow like liquids.

• Particles are arranged randomly and have weak intermolecular forces.

• In solids, particles are closely packed in a fixed arrangement, vibrate in place, and are held together by strong intermolecular forces.

• Particles are loosely arranged and can move freely.

Abigail is conducting experiments in her kitchen. She notices that when she melts ice, the process absorbs heat, and when she freezes water, the process releases heat. Based on Abigail's observations, define endothermic and exothermic processes with examples.

• Endothermic processes are always spontaneous; exothermic processes are never spontaneous.

• Endothermic processes absorb heat (e.g., melting); exothermic processes release heat (e.g., freezing).

• Endothermic processes release heat (e.g., freezing); exothermic processes absorb heat (e.g., melting).

• Endothermic processes occur in gases only; exothermic processes occur in liquids only.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Avery is conducting an experiment with a sealed container of water. She gradually increases the pressure inside the container and observes the direct changes in temperature, following the line on the graph. How does pressure affect the temperature of the water?

• As pressure increases, the temperature decreases.

• Pressure has no effect on the temperature.

• As pressure increases, the temperature increases.

• The temperature of matter always remains constant.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to the particles of a substance during a phase change?

• The particles remain unchanged during a phase change.

• The particles only change color during a phase change.

• The particles gain or lose energy, changing their movement and spacing.

• The particles become larger and heavier without energy change.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Scarlett is making chocolate at home. She notices that as she heats the solid chocolate, it starts to turn into a liquid at a certain temperature. What is the significance of this melting point in the states of matter?

• The melting point is irrelevant to the behavior of solids and liquids.

• The melting point indicates the transition from solid to liquid, reflecting the energy required to overcome intermolecular forces.

• The melting point determines the color of a substance when heated.

• The melting point is the temperature at which a gas becomes a solid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Sophia leaves an ice cube on the kitchen counter and observes it over time. What is the relationship between temperature and the state of matter in this scenario? (Remember: as kinetic energy increases, temperature increases, too.)

• All states of matter exist at the same temperature.

• Temperature only affects gases, not solids or liquids.

• Temperature has no effect on the state of matter.

• Temperature influences the state of matter by changing the kinetic energy of particles, leading to phase transitions.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When Zoe puts a tray of water in the freezer, what happens to the water particles as energy in the form of heat is removed from them?

• They speed up and spread out

• They slow down and get closer together

• They stop moving

• They move closer together and speed up

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Sophia is observing water in different forms: steam rising from a kettle, water in a glass, and ice cubes in a freezer. In which state of matter does the water have the LEAST kinetic energy?

• gas

• liquid

• solid