Melting butter is a physical change. Which best describes what is happening?
What did you include in your response? Check all that apply.
condensation✔ meltingsublimation
Use the drop-down menus to match each description with the appropriate change of state.
Define kinetic energy and thermal energy. Describe what happens to each as the temperature of a substances increases.
All matter is made up of particles that are constantly moving. The motion of the particles results in kinetic energy. The part of total internal energy that can be transferred is thermal energy. As temperature increases, the particles in a substance move faster and have greater kinetic and thermal energy.
condensationmelting✔ sublimation
freezing✔ meltingsublimation
What happens to the atoms in a scoop of ice cream as it melts?
Describe the conditions necessary for sublimation to occur.
Sublimation occurs because the atoms in a solid must gain enough energy to form a gas without passing through the liquid state. Low air pressure and large amounts of energy, often in the form of heat, allow the atoms to move fast enough to overcome the attractive forces between them.
Determine which change of state is being described in this passage.As the temperature decreases, the atoms lose energy. The atoms begin to move slower. They are held together by attractive forces, but are still able to slide past each other.
Which changes of state are characterized by having atoms that gain energy? Check all that apply.meltingsublimationfreezingvaporizationcondensationdeposition
Name the two types of vaporization and explain the difference between them. Give one example of each.
Vaporization is the process by which a liquid becomes a gas. The two types of vaporization are evaporation and boiling. Evaporation takes place at the surface of a liquid, such as a puddle drying up. Boiling takes place below the surface of a liquid and causes bubbling, like a pot of water on a hot stove.
✔ condensationmeltingsublimation
boiling✔ evaporationcondensation
What did you include in your response? Check all that apply.
What did you include in your response? Check all that apply.
✔ depositionsublimationvaporization
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