Flashcardziz - QA2 PES & MM (units 1 and 2) 24-25

Front

What is melting?

Back

Melting is the process where a solid turns into a liquid when it is heated.

Front

What happens to water when it freezes?

Back

When water freezes, it turns from a liquid into a solid (ice).

Front

Why do oil and vinegar separate?

Back

Oil and vinegar separate because their molecules are not attracted to each other.

Front

What is solubility?

Back

Solubility is the ability of a substance to dissolve in a solvent, like sugar dissolving in water.

Front

What is the difference between a solid and a liquid?

Back

A solid has a fixed shape and volume, while a liquid has a definite volume but takes the shape of its container.

Front

What is a molecule?

Back

A molecule is a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the role of temperature in changing states of matter?

Back

Temperature affects the energy of particles; increasing temperature can cause solids to melt into liquids, and liquids to evaporate into gases.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is a constellation?

Back

A constellation is a group of stars that form a recognizable pattern in the night sky.

Front

Why do some substances dissolve in water while others do not?

Back

Some substances dissolve in water because their molecules are attracted to water molecules, while others do not have this attraction.