science

Front

What happens to the speed of molecules in a solid substance when it is heated?

Back

The speed of its molecules increases.

Front

What is a molecule that consists of different atoms called?

Back

A compound molecule.

Front

What is the composition of a water molecule?

Back

One oxygen atom and two hydrogen atoms.

Front

If you add 30 cm³ of water to 20 cm³ of alcohol, what is the total volume of the mixture?

Back

48.8 cm³.

Front

Are the distances between molecules in solid substances very small?

Back

True.

Front

What is the definition of a solid?

Back

A state of matter with a definite shape and volume.

Front

What is the primary characteristic of liquids?

Back

They have a definite volume but take the shape of their container.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the process called when a solid turns into a liquid?

Back

Melting.

Front

What is the process called when a liquid turns into a gas?

Back

Evaporation.