Vocabulary
A group of atoms joined together in a particular way.
What is a molecule?
This happens to molecules movement when you transfer energy in.
What is molecules move faster?
This state of matter when molecules vibrate or move in place.
What is a solid?
The pull between two molecules in a substance is known as __________.
What is molecular attraction?
The average kinetic energy
What is temperature?
A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later, the molecules move around each other. What phase change is taking place?
What is gas to liquid?
The state of matter in which molecules move away from each other.
What is a gas?
The temperature at which a substance changes from the solid phase to the liquid phase.
What is the melting point?
The way molecules in a substance move around relative to each other.
What is freedom of movement?
This happens to molecules kinetic energy when they move slower.
What is decreases?
The phase change going from gas to a liquid.
What is Condensation?
Substance A and Substance B are both liquids. Substance A has a strong molecular attraction and Substance B has a weak molecular attraction. Which would need less energy to change into a gas?
What Substance B with the weak attraction?
When the molecules of a liquid slow down and its molecular attractions become fixed in place.
What is freezing?
At the beginning of the chocolate-making process the molecules move around each other. After it cools the molecules move in place. What phase change is this?
What is liquid to solid?
Evaporation is a phase change from ________ to _________.
What is liquid to gas.
For a phase change to take place this needs to happen.
What is overcoming the molecular attraction?
The energy that an object has because it is moving.
What is kinetic energy?
Scientists put a sample of water into a sealed tank. Water can be a solid, liquid, or gas. At first, the molecules moving around each other. Then, the scientists transferred energy into the substance, and the molecules moved apart.
What is liquid to gas (Evaporating)?
The two phases that have no fixed shape and will take the shape of their containers.
What is gas and liquid?
If enough energy is added to break the attraction of a substance, this will happen.
What is phase change?