Substances and Their Properties

What is a Substance?

• traits that can be measured

• something that is made of more than one type of matter

• matter that has a constant chemical composition and

  characteristics.

• the temperature at which a substance changes from solid to liquid

Tags

NGSS.MS-PS1-4

What are Properties?

• molecules and extended structures

• characteristics of a substance.

• chemicals

• none of the above

Tags

NGSS.MS-PS1-2

You cannot see a macroscopic amount of air because

• Air is made out of tiny molecules in a gas form. You cannot see molecules with your eyes.

• Air is always clear.

• Air is made of nothing so you cannot see something that is not matter or even there.

• You can see the molecules that make up air. They are big enough to see with your eyes. Trick question.

If you have a pile of gold jewelry like this, what properties do you notice it has?

• The jewelry is pretty

• The jewelry hass mass

• The jewelry has volume

• The jewelry has density

• The jewelry is ugly

What is solubility?

• different materials placed together but keeping their own properties

• a mixture in which substances spread out evenly and will not settle

• the degree to which a material will dissolve in another substance

• the substance in a solution that has the greatest amount

• the substance in a solution that has the least amount

A pharmacist accidentally mixes up the labels on some bottles. What properties should he test for in his experiment?

• mass

• weight

• solubility

• size

When clay and water are mixed, it settles into two layers. When sugar and water are mixed, no layers are formed. Explain why clay and water form two different layers, but sugar and water does not.

• Clay and sugar are both soluble.

• Only Clay is soluble

• Clay is not soluble in water, but sugar is

• Clay should not be mixed with water.

Tags

NGSS.MS-PS1-2

A student is making lemonade. Initially, all of the sugar dissolves. She adds more sugar, but it stops dissolving. She adds more water to the mixture, which causes the sugar to dissolve again. What caused the increase in the amount of sugar particles that dissolved?

• Adding more sugar

• Adding more water

• Mixing

• Letting them settle

___________ is a substance that occupy space and has mass.

• Element

• Matter

• Molecules

• Compound

Tags

NGSS.MS-PS1-5

When a solid reaches the temperatures of its ___, it can become a liquid.

• melting point
• freezing point
• boiling point
• density

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4