Which of these substances is a compound?

• Carbon (C)

• Chlorine (Cl)

• Uranium (U)

• Ammonia (NH3)

Tags

NGSS.MS-PS1-1

If you were to look at grains of table salt (sodium chloride, NaCl) with a magnifying glass, you would see that each grain is a little cube. Why are salt grains cubical?

• All extended structure compounds form cubes.

• Sodium and chlorine atoms both have cubical shapes.

• In the extended structure of NaCl, atoms are arranged in a cubical pattern.

• A molecule of NaCl contains eight atoms, each at one of the corners of a cube.

Tags

NGSS.MS-PS1-1

Sucrose is composed of carbon, oxygen, and hydrogen. Which statement best describes the properties of sucrose?

• They are exactly like the properties of carbon (C).

• They are exactly like the properties of oxygen (O).

• They are exactly like the properties of hydrogen (H).

• They are different from the properties of carbon, oxygen, and hydrogen.

Tags

NGSS.MS-PS1-1

A molecule of methanol is composed of carbon atoms connected to 3 hydrogen atoms and a hydroxide group. A hydroxide group is made up of an oxygen atom bonded to a hydrogen atom. How many different types of atoms make up one molecule of methanol?

• 3

• 4

• 5

• 6

Tags

NGSS.MS-PS1-1

The diagram represents a chemical reaction. Reactant A and reactant B react to form product C. What type of substance is product C?

• an atom

• a mixture

• an element

• a compound

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which statement describes an example of a chemical property of a metal statue?

• It is a solid

• It is shiny

• It is silver

• It can tarnish

Which of these is an example of a physical property?

• the fact that iron rusts

• the texture of a piece of chocolate

• the effect of acid rain on automobiles

• the fact that gasoline in a car engine combusts

Tags

NGSS.MS-PS1-2

Which of these is a chemical property of a sheet of paper?

• The paper can be burned.

• The paper can be crumpled.

• The paper does not attract a magnet.

• The paper does not conduct electricity.

Tags

NGSS.MS-PS1-2

Hydrogen gas (H) can be found in trace amounts in Earth's atmosphere. Which of these statements describes a physical property of hydrogen?

• Hydrogen is found in acids.

• Hydrogen gas is highly flammable.

• Hydrogen reacts with oxygen to form water.

• Hydrogen gas is less dense than oxygen gas.

Which properties describe all matter?

• being able to be seen in nature

• having energy and temperature

• being able to be easily measured

• having mass and taking up space