Mixture and Solutions STAAR Review

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically combined and can be separated by physical means.

Front

What is a solution?

Back

A solution is a special type of mixture where one substance (the solute) is completely dissolved in another substance (the solvent).

Front

How can you separate a mixture of corks and ping pong balls?

Back

You can separate them by placing the mixture in water; corks will float while ping pong balls will sink.

Front

What property allows plastic beads to float in water?

Back

Plastic beads are less dense than water, which allows them to float.

Front

What is the difference between a mixture and a solution?

Back

In a mixture, the components retain their individual properties, while in a solution, the solute dissolves and cannot be easily separated.

Front

How can you separate a mixture of steel and plastic paperclips?

Back

You can use a magnet to attract the steel paperclips, separating them from the plastic ones.

Front

What happens when you add more solute to a saturated solution?

Back

The additional solute will not dissolve and will remain undissolved at the bottom of the container.

Front

What is evaporation?

Back

Evaporation is the process where liquid turns into vapor, which can be used to separate a solute from a solvent.

Front

Why can salt be separated from saltwater by boiling?

Back

When saltwater is boiled, the water evaporates, leaving the salt behind.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, which determines whether it will float or sink in a liquid.