Unit 2 Test-Mixtures

Look at the image. Why is this considered a mixture?

• It contains all solid items and no liquuids.

• It cannot be separated into individual items

• It has different nuts and fruits

• The different parts can be easily separated

Tags

NGSS.5-PS1-3

NGSS.5-PS1-4

Which of these items could be classified as solutions? Choose all that apply.

• A bucket of saltwater

• A bowl of vegetable soup

• A ladle of oil and vinegar salad dressing

• A cup of tea

How are a mixture of SAND and WATER different from a mixture of SALT and WATER?

• Sand melts in the water. Salt dissolves in the water.

• Sand floats in the water. Salt sink in the water.

• Sand dissolves in the water. Salt does not dissolve in the water.

• Salt dissolves in the water. Sand does not dissolve in the water.

Tags

NGSS.MS-PS1-2

A student creates a list of mixtures. Some of them are solutions and some are not. Read the list of items. 1. Honey 2. Muddy water 3. Liquid glass cleaner 4. Sugar cookies Which of these are solutions?

• A. 1 and 2

• B. 2 and 3

• C. 1 and 3

• D. 3 and 4

Which of the following describes how a solution is formed?

• A substance melts in another substance, forming a solution.

• A solid substance floats on top of a liquid substance, forming a solution.

• A substance breaks down to dissolve into tiny pieces in another substance, forming a solution.

• A solid substance melts into a liquid substance, forming a solution.

The diagram compares mixtures and solutions. Where on the diagram should "Contains 2 or more substances" be placed?

A student adds 25g of sand to a beaker filled with 100mL of water and lets it sit for 10 minutes. Which TWO facts about the mixture are true?

• The new mixture contains 25g of sand.

• The new mixture contains 125mL of water.

• The new mixture contains something that has dissolved.

• The new mixture has sand in the bottom of the glass.

• The new mixture will be totally clear.

Tags

NGSS.MS-PS1-2

A student follows these procedures in class. How many grams of sugar can they expect to find in the pan after step 3?

• 0 grams

• 100 grams

• 900 grams

• 1,000 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Choose the tools that would be helpful to separate a mixture of sand, salt, and water.

• strainer and magnet

• filter and hot plate

• tweezers and strainer

• magnet and hot plate

Use the venn diagram to help you complete the sentences.

Solutions can be separated by​ (a)   while mixtures can be separated by ​ (b)   . An example of a solution is ​ (c)   and an example of a mixture would be ​ (d)   .

• evaporation
• sifting
• ocean water
• fruit salad