FDC #1 Prep

How many atoms are needed to form a molecule?

• One

• Two to thousands

• none

• compound

Tags

NGSS.MS-PS1-1

Which of the following is true about how hydrogen and oxygen can combine to form molecules?

• Hydrogen and oxygen can combine in many ways to form different molecules.

• Two atoms of hydrogen are always required to bond with two atoms of oxygen.

• When oxygen combines with hydrogen to make a molecule, water will always be produced.

• Molecules composed of hydrogen and oxygen must have at least four atoms.

Tags

NGSS.MS-PS1-1

Molecules composed of hydrogen and oxygen must have at least four atoms.

• Atoms are molecules that have a charge.

• Atoms have smaller parts, called molecules.

• Molecules are made up of two or more atoms.

• Molecules are atoms that have no mass.

Tags

NGSS.MS-PS1-1

Graphite is a soft, dark material often used as a lubricant. Diamond is often a clear, hard crystal. Which of the following best explains the difference in these materials?

• The elements of which each one is made

• The number of atoms each one is made of

• The size and shape of the individual atoms

• The arrangement of the atoms of each one

Tags

NGSS.MS-PS1-1

How many hydrogen atoms are needed to bond with nitrogen to create one molecule of ammonia, NH3?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

When two or more atoms are joined together chemically, a(n) ___________ is formed.

Tags

NGSS.MS-PS1-1

Which of the following changes made to a sample of liquid would result in an increase in the distance between the individual molecules of the substance?

• Transferring the substance to a smaller container

• Adding heat energy to the substance

• Changing the phase of matter from liquid to solid

• Decreasing the overall kinetic energy of the liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A student drew a representation of the atoms of a solid. The illustration shows closely packed atoms vibrating, but remaining in the same relative positions. Which of the following changes must the student make to the illustration to accurately represent the same substance in the liquid phase?

• Each individual atom should be much larger

• There should be very wide spaces between the atoms

• The illustration should show increased movement of the atoms

• The shape of each atom must reflect the shape of the container

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Look at the following image. 

Select all terms that apply to the image. 

• atom

• molecule

• compound

• crystal

Tags

NGSS.MS-PS1-1

As thermal energy is added to a substance, which of the following changes can be predicted?

• Spacing between particles will decrease

• Vibration of individual particles will increase

• Temperature of the substance will decrease

• The pressure of the air around the substance will increase

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4