Vocabulary
What is the definition of Mass?
is the amount of matter (stuff) in an object. It's like how heavy something feels when you lift it.
What is evaporation?
When a liquid turns into a gas
What happens when particles are heated?
When we heat something up, like melting chocolate in a pot for hot cocoa, the particles inside the chocolate start to move faster. This makes the attractive forces between them weaken. As the attractive forces weaken, the particles spread out, and there's more space between them.
What is an example of a reversible phase change?
Heating or cooling water
What is the definition of Volume?
is the amount of space something takes up. Imagine filling a glass with water; the amount of space the water fills is its volume.
What is condensation?
When a gas turns into a liquid
What happens when particles are cooled?
When we cool something down, like freezing water into ice cubes, the particles slow down. As they slow down, the attractive forces between them get stronger. As the attractive forces increase, the particles come closer together, and the space between them decreases.
Why do engineers consider weather conditions when building infrastructure?
Different materials used in construction have varying responses to temperature changes.
What is the definition of a phase change?
is when a substance changes from one form to another. Think about ice melting into water or water boiling into steam.
What happens when something melts?
A solid heats up or the particles slow down so a solid turns into a liquid
What temperature does what boil at?
100C
What happens to mass during phase changes?
The total mass of the substances before and after a phase change remains the same, even though the arrangement of particles may have altered.
What is the definition of attractice forces?
are special forces that make things come closer to each other, even if they're not touching.
What is deposition?
it's when a gas turns directly into a solid without becoming a liquid first.
What temperature does water freeze at?
0C
What happens to volume during phase changes?
During phase changes, the volume (how much space it takes up) can change.
What are particles?
are the super tiny pieces that make up matter. Imagine them as the LEGO blocks that build up everything around you. These particles are always moving, even if we can't see them (like air).
What is sublimation?
Sublimation is the opposite of deposition. It's when a solid turns directly into a gas without becoming a liquid first.
What happens when a soccer ball is left outside in the cold?
It contracts
What is the scientific process that happens in a liquid thermometer?
Thermal expansion