physical state
what is a solid
has a definite shape and volume; the particles are tightly packed together
what is the first phase
new moon
what is evaporation and a gas
a liquid turns into a gas or vapor; neither a defined shape nor a defined volume, expanding to fill any container it is in
what is a liquid
has a definite volume but takes the shape of its container
what is the difference between melting and freezing
Melting is a process where a solid turns into a liquid, which happens when heat is added and a substance's temperature rises above its melting point. Freezing is the opposite process, where a liquid turns into a solid as heat is removed and its temperature falls below the freezing point
what is condensation
where a gas, like water vapor, cools and changes into a liquid