Vocabulary
the energy that an object has because it is moving
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 was the phase change?
What is liquid to gas? (Evaporation)
The term for a change from solid to liquid.
What is melting?
How the molecules of a solid substance move.
What is they move in place?
What happens to molecules when their kinetic energy decreases.
They move slower
What occurs when molecules that make up a substance experience a change to their freedom of movement and a the substance changes appearance.
What is a phase change?
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 change did the scientist observe in the substance?
What is before, the substance was a gas; Later, it was a liquid? (Condensation)
A cold drink is left out, and condensation forms on the outside of the glass. The phase change that happened is ______.
What is condensation?
How the molecules of a liquid move.
What is they move around each other?
What happens to the kinetic energy of a substance when the temperature is increased.
What is increases?
a pull between two molecules that is always the same for a substance
molecular attraction
Mario is making chocolate. At the beginning of the chocolate-making process, the molecules were moving around each other. After the chocolate cooled the molecules moved in place . What was the phase change?
What is liquid to solid? (Freezing)
The process when a substance goes from liquid to gas.
What is evaporation?
How the molecules of a gas move.
What is they move away from each other?
The phase with the least kinetic energy.
What is a solid?
the way molecules in a substance move around relative to each other
freedom of movement
A substance is left in a container in a vehicle overnight, the molecules in the substance move around each other to begin with but at one point the molecules start to move in place. The substance bursts from the container it is kept in, What phase change occured to the substance?
What is a liquid to a solid? (Freezing)
The term for the change from gas to liquid.
What is condensation?
How the molecules of a substance move when the substance started as liquid and changed phase to a solid.
What is molecules that moved around each other and then in place?
The phase with the most kinetic energy.
What is a gas?
A phase change occurs when the kinetic energy increases enough to _________ the attraction between molecules.
What is overcome?
Andy measured the temperature of a pond near his house. Before he left for school, the water in the pond was 18°C. When he came home from school, the temperature of the pond was higher than it was in the morning. What happened to the water molecules while he was at school?
What is the molecules started moving faster?
The temperature at which a substance changes from solid to liquid.
What is the melting point?
A cold drink is left out, and condensation forms on the outside of the glass. The molecules of the condensation on the glass before the it formed moved ________ and then once the condensation formed the molecules moved ______.
What is away from each other and around each other?
How the kinetic energy of the molecules in a substance change during the melting process.
It increases as the solid turns into a liquid.