Final Exam Review

Use the chemical formula displayed below to complete the following statements by selecting the correct answers from the drop-down menus. H₃PO₄ In the chemical formula displayed above, there are ___ different elements and ___ total atoms. There are ___ more oxygen (O) atoms than there are phosphorus (P) atoms.

• 3, 8, 3

• 2, 7, 2

• 4, 9, 4

• 3, 7, 2

Tags

NGSS.MS-PS1-1

Which of the following are physical changes? Select TWO correct answers.

• iron rusting

• copper changing color

• boiling water

• hydrogen and oxygen producing water

• ice cream melting

During recycling, ground glass is melted under light heat and poured into molds. Which type of change occurs as the glass melts?

• change in state

• change in mass

• change in reactivity

• change in composition

Tags

NGSS.MS-PS1-4

Which of the following does NOT indicate a chemical change occurred?

• A gas being produced

• A solid being formed

• A change in temperature

• Temperature staying the same

Tags

NGSS.MS-PS1-2

A 4500 kg plane is cruising at 22,000 m above sea level, with a force of 45 N to the east. In order to find out the plane's acceleration, which formula triangle represents the correct arrangement of variables in order to solve this problem?

• Triangle A (F on top, M and A on the bottom)

• Triangle B (F and A on the bottom, ? on top)

• Triangle C (F on top, M and A on the bottom)

• Triangle D (all sections labeled with ?)

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A force between two objects that are touching is a -

• relative force

• contact force

• non-contact force

• tension force

What unit is used to measure force?

• the ton

• the newton

• the kilogram

• the meter

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Which force is responsible for a rocket launching?

• gravity

• engine drag

• engine retrograde

• engine thrust

Which statement below is an example of balanced forces?

• The objects involved are motionless

• The objects involved are in constant contact with one another

• The objects involved are in motion independent of one another

• The objects involved are increasing in speed

When brakes are applied in a vehicle, it slows down as a result of which force?

• speed

• gravity

• friction

• Both gravity and friction