Physical Science Matter

How do you calculate the density of a substance?

• Mass divided by volume

• Density divided by volume

• Volume divided by mass

• Weight divided by volume

Why is water classified as a compound?

• Because it is an element, which consists of only one type of atom.

• Because it is a substance, which can easily be separated.

• Because it is a substance composed of two or more kinds of atoms bonded together.

• Because it is an unevenly mixed solution, or a heterogeneous mixture.

Tags

NGSS.MS-PS1-1

A student is designing an experiment for the science fair.  She needs to find a material that conducts an electric current, and her teacher has provided her with samples of the following elements.  Which of them should she choose?

• argon

• fluorine

• copper

• phosphorous

The mass of the products in a chemical reaction is the same as the mass of the reactants in the reaction. Which law best describes this statement?

• The Law of Conservation of Angular Momentum

• The Law of Superposition

• The Law of Conservation of Matter

• The Law of Entropy

Tags

NGSS.MS-PS1-5

After a chemical reaction occurs in an open test tube, measurements indicate that the mass of the reactants is greater than the mass of the products remaining in the test tube.  What MOST LIKELY explains the measurements?

• A gas was produced.

• A solid was produced.

• The salinity of the reactants was high.

• The temperature of the reactants was low.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student is asked to categorize the following items as elements, compounds, or mixtures: copper wire, salt, aluminum foil, baking soda, a piece of granite, and sugar water. He lists ELEMENTS as copper wire, aluminum foil, and baking soda; COMPOUNDS as salt; MIXTURES as the piece of granite. Which is in the wrong category?

• copper wire

• baking soda

• sugar water

• salt

Which is an example of a chemical reaction?

• a pot of water boiling

• an iron nail rusting

• a piece of ice melting

• a sugar cube dissolving in tea

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A scientist recognizes a white powder as sugar due to its white crystals and its sweet taste. However, the scientist notices that the elements that make up the sugar - carbon, hydrogen, and oxygen - look nothing like sugar, nor are they sweet. What is the best explanation for this?

• Sugar is a compound, and compounds usually have a different appear

• Sugar is an element, so its properties are unique.

• Sugar is a heterogeneous mixture, so its appearance is unique.

• Substances in nature change randomly and it is impossible to predict those changes.

Tags

NGSS.MS-PS1-1

• 5 grams

• 15 grams

• 10 grams

• 50 grams

Tags

NGSS.MS-PS1-5

How can a scientist, using the periodic table, find an element with properties similar to another element?

• by comparing density

• by finding its periodic group

• by comparing malleability

• by comparing atomic weight