Phases of Matter

Front

What are the three main phases of matter?

Back

Solid, Liquid, Gas.

Front

How do particles behave in a solid?

Back

Particles are closely packed together and vibrate in place.

Front

How do particles behave in a liquid?

Back

Particles are close together but can move past one another, allowing liquids to flow.

Front

How do particles behave in a gas?

Back

Particles are far apart and move freely, filling the available space.

Front

What happens to particles when temperature increases?

Back

Particles move faster and have more energy.

Front

What is density?

Back

Density is the mass of an object divided by its volume (Density = Mass/Volume).

Front

What is the density of an object with a mass of 250 g and a volume of 2000 cm³?

Back

0.125 g/cm³.

Front

What is an endothermic change?

Back

An endothermic change is a process that absorbs energy, usually in the form of heat.

Front

What is an exothermic change?

Back

An exothermic change is a process that releases energy, usually in the form of heat.

Front

What must happen for dry ice to turn into carbon dioxide gas?

Back

Dry ice must undergo an endothermic change.