Chemistry Midterm

If I want to determine the property of ___________, I would see if it can dissolve in a liquid.

• Density

• Substance

• Mixture

• Property

• Solubility

__________ is a property of a substance that describes how the mass of a substance is spread out over a particular volume of that substance  $\left(m\div v\right)$  

• Density

• Substance

• Mixture

• Property

• Solubility

A _________ is made up of only one type of material all the way through (atoms or molecules)

• Density

• Substance

• Mixture

• Property

• Solubility

A _________ is made up of more than one substance (can be seperated) 

• Density

• Substance

• Mixture

• Property

• Solubility

A _________ is a unique characteristic that helps identify a substance (Such as hardness, color, melting point.)

• Density

• Substance

• Mixture

• Property

• Solubility

A water molecule is made of one oxygen and two hydrogen atoms. Why is water considered a pure substance?

• Because Water is made of different parts

• Because water can be broken down into smaller parts

• Because each water molecule is identical

• Because water is healthy for you

Tags

NGSS.MS-PS1-1

The picture shows a magnet near a pile of particles of iron and sulfur. the magnet attracts the iron, separating it from the mixture. Based on the picture, which statement is true?

• A mixture cannot be separated

• The parts of a mixture keep their own their own properties

• Iron and sulfur is not a mixture

Tags

NGSS.MS-PS1-2

A rock is dropped into a graduated cylinder containing 40 mL of water. The liquid is now at 47 mL. What is the volume of the rock?

• 7 mL

• 47 mL

• There is not enough information to determine the volume with the information given.

• 87 mL

A scientist has two containers. Inside each container is a blue liquid. The liquids are substances. What can the scientist do to help her determine whether these two liquids are the same substance?

• Measure the density of the two liquids and compare densities

• Weigh each liquid and compare weights

• Measure the volume of each liquid and compare volumes

• Measure the temperature of each liquid and compare temperatures

• Drink them and see what happens

Tags

NGSS.MS-PS1-2

You find a clear gem that is made of one substance. What could you do to identify whether the gem is a diamond?

• Determine the shape and compare it to the shape of other gems, including diamonds.

• Determine its melting point and compare it to the melting point of other gems, including diamonds

• Measure its mass and compare it to the mass of other gems, including diamonds