Yes, exactly.
The type of matter with a definite volume but no fixed shape is a liquid. In a gas, there is no definite volume or shape, and in a solid there is a fixed shape and definite volume. A liquid is free to adopt of shape of its container, but its volume is fixed.
Solids. Liquids and gases take the shape of the container they're in and the volume of gases changes with pressure and temperature.
A cup is a soild because solids are hard (sometimes soft and fluffy) with can be changed shape only by force. However, for liquid, can changed it shape inside different jars or bowls.
Soild
the lower mantle is a soild.
Toothpaste is a liquid.
Liquid.
Soled
Both
Melting
What is a soild
By melting