Chapter 2 modeling matter

If a substance can dissolve in water or it's molecules are attracted to water, we call this ____________.

• Attracted

• Dissolved

• Soluble

• Insoluble

Think back to our solubility experiment. The cumin and pepper solid molecules were not attracted to the liquid molecules. Which of the following behaviors did the cumin or pepper molecules demonstrate?

• The solid molecules separated.

• The solid molecules dissolved.

• The solid molecules were clustered together.

• The solid molecules were soluble.

Which of the following is true for two substances that are mixed and have a HIGH attraction?

• They are completely mixed.

• They are slightly mixed.

• They are not mixed at all.

• None of the above.

The word soluble means....

• float

• sink

• dissolve

• sediment

If there are sediments in our salad dressing that means....

• all the ingredients in the salad dressing dissolved/disappeared

• we can see little pieces in the salad dressing that have not dissolved.

Check off all the ingredients that leave sediments when in water

• cumin

• pepper

• sugar

• citric acid

Tags

NGSS.MS-PS1-2

Check off all the ingredients that DISSOLVE when in water

• cumin

• pepper

• sugar

• citric acid

Tags

NGSS.MS-PS1-2

The simulation helped us understand what molecules do when a solid is added to a liquid. When a solid DISSOLVES in a liquid that means......

• The molecules are attracted to one another and spread throughout the mixture evenly

• The molecules are not attracted to one another and clump together and do not mix together

Tags

NGSS.MS-PS1-2

The simulation helped us understand what molecules do when a solid is added to a liquid. When a solid DOES NOT DISSOLVE in a liquid that means......

• The molecules are attracted to one another and spread throughout the mixture evenly

• The molecules are not attracted to one another and clump together and do not mix together

In the book "Solving Dissolving" Maya and her brother added sugar to a cup of water and the sugar disappeared. How did Maya's brother prove to her that the sugar was still there?

• He put the cup by the window so the water would evaporated and the sugar would be left at the bottom of the cup.

• He made Maya taste the water so she could see it tasted sugary

• He and Maya looked at the water under microscope in hopes of finding a sugar molecule.

Tags

NGSS.MS-PS1-2