Unit 4 Matter Review

If I put yeast into a bowl of water and then add sugar what kind of change will occur?

• physical

• chemical

• scientific

• growth

If I take two balloons.  Each balloon gets the same amount of water, sugar, and yeast.  One balloon I put on my kitchen table and the other in the window, on a sunny day.  The balloon in the window got bigger.  Why?

• The window area is cooler.

• The window area is warmer.

• The table is warmer.

• The table is cooler. 

What has the greatest impact on substances changing state?

• temperature

• light

• color

• shape

Why do you have to keep cream in the refrigerator?

• Cream tastes better cold.

• No physical and chemical changes occur in cooler temperatures.

• The reaction that causes cream to spoil slow down at colder temperatures.

• Physical changes cause cream to spoil at a slower rate.

Which is a chemical change?

• Water falling

• Digging a hole

• Broken glass

• Fireworks

When you are dissolving something in water it will dissolve faster a lower temperatures.

• True

• False

The more you stir something the faster it will dissolve.

• True

• False

When you add salt to boiling water you have created...

• A mixture called a solution

• A solution called a mixture

• A mixture called a combination

• A solution called a combination

A salad and sand are both examples of ...

• atoms

• mixtures

• solutes

• solutions

Which of these will dissolve in water...

• Garlic

• Oil

• Pepper

• Salt