Mixture and Solutions

The bobber is able to float in the water because -

• It has a greater density than the water

• It is too heavy to sink to the bottom

• It mass will not allow it to sink

• Its density is less than water

The oven mitt shown here is being used because

• The mitts conduct thermal energy

• The pan conducts heat energy

• The pan is an insulator

• The mitts make the cook look cool

Tags

NGSS.MS-PS3-3

Which term best describes wet clothes drying in the hot sun

• Melting

• Condensation

• Evaporation

• Freezing

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

A solution is made using 100 ml of water, and 20 g of salt. What is the best way to separate this solution

• Pour the mixture through a strainer

• Add 100 ml more of water

• Use a coffee filter

• Evaporate the water on a hot plate

True or False? A solution can be made by combining vegetable oil and water.

• True

• False

Tags

NGSS.MS-PS1-2

Students pour 4 different substances into 4 different containers and stir them to see what will happen? Which of the following will be the least likely to dissolve?

• Sand

• Salt

• Food coloring

• Sugar

Tags

NGSS.MS-PS1-2

The most ideal way to separate this mixture of sand and water is to -

• use a hot plate

• pour the mix through a strainer

• shake the mixture rapidly

• pour the mix through a coffee filter

Which material would not remain very hot after being removed from a pot of boiling water?

• Wooden spoon

• Silver dollar

• Copper tubing

• Steel Nail

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

An item has been identified as being a good conductor, magnetic, and not soluble in water. It is also more dense than water. What could it be?

• Aluminum can

• Iron nail

• Copper penny

• Rubber eraser

A bowl full of different colored candies is an example of a

• solution

• mixture

• evaporation

• relative density