Dissolving Review!

What is it called when a solid is mixed into a liquid and the sold disappears?

• solute

• solubility

• dissolving

• matter

When sugar is mixed into sweet tea, the particles look like they have disappeared. What is the best explanation of what happened?

• the sugar evaporated

• the sugar changed its chemical composition and became a new substance

• the sugar tuned into tea leaves

• the sugars broke down into molecules too small to see.

Tags

NGSS.MS-PS1-2

Ernesto and Amanda fill two cups with water. They use hot water in one cup and cold water in the other cup. Next, they will stir a spoon of salt into each cup.     

In which cup will the salt dissolve more slowly? 

• The salt will not dissolve in either cup
• The salt dissolves more slowly in the hot water
• The salt dissolves more slowly in the cold water
• The salt dissolves at the same speed in both cups

Tags

NGSS.MS-PS1-4

Some substances ........................... when you mix them with water.

• squash

• dissolve

• heat

Dissolved substances cannot be seen, they become part of the water.

• True

• False

Tags

NGSS.MS-PS1-2

The process of a solid changing phase to a liquid is _______.

• freezing

• melting

• dissolving

• evaporation

Tags

NGSS.MS-PS1-4

___________________________ is required for dissolving to happen.

• Heat

• Water/liquid

• Happiness

• Cold

___________________________ is required for melting to happen.

• Heat

• Water/liquid

• Happiness

• Cold

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A solid substance will dissolve faster in ________________ water than in _______________ water.

• cold; hot

• hot; cold

Tags

NGSS.MS-PS1-4

Putting sugar in your tea to sweeten it.

• MELTING

• DISSOLVING