Science Mixtures Review

Ingredients in some mixtures maintain their physical properties

• True

• False

If I poured/stirred the same amount of four different powders into four separate beakers with the same amount of water and then let them sit for 30 minutes, what question would I be able to answer based on my observations?

• What water temperature do the substances dissolve at?

• How much water is needed to cause a substance to change state?

• What causes a substance to sink when put in water?

• Which substances dissolve in water?

If I placed solid clay in a glass of water it would

• dissolve

• melt

• not change at all

• evaporate

How could I separate toothpicks from marbles in a bowl without touching them?

• You can't

• mix in glue

• pour in water

• put the objects in a paper bag

Which of the following objects are magnetic?

• Toothpicks

• paper clips

• both objects are magnetic

• both objects are not magnetic

Tags

NGSS.3-PS2-4

NGSS.5-PS1-3

Mixtures can be more easily separated if

• they have different physical properties

• they have the same physical properties

• mixtures do not ever easily separate

If a mix a spoonful each of salt, sand, and tiny pieces of iron together to form a mixture, what will happen to all of the materials?

• they will change to one color

• they will all become magnetic

• they will dissolve

• nothing, they will keep their individual properties

What would be the fastest way to get the salt out of a salt water solution?

• Drink it

• use a filter

• use a hot plate to make the water evaporate

• leave the solution on the counter and allow the water to evaporate

When mixing any liquids with solids to see the effects, I should practice science safety

• True

• False

Which of the following provides evidence that ingredients in some mixtures maintain their physical properties?

• iron filings were pulled out of sand using a magnet

• Sand was separated from water by using filter paper

• Marbles were separated from water by evaporating the water

• All of the above