Final Exam Preparation

The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?

• element

• atom

• electron

• molecule

Tags

NGSS.MS-PS1-1

The substances that undergo change in a chemical reaction are called

• reactants.

• products.

• coefficients.

• elements.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following does NOT state what the arrow means in a chemical equation?

• forms

• produces

• conserves

• yields

Which of the following does NOT show the law of conservation of mass?

• 24 g of Mg burn in 32 g O₂ to produce 56 g of MgO.

• 24 mL of Mg burn in 32 mL O₂ to produce 56 mL of MgO.

• 2 atoms of Mg react with 1 molecule of O₂ to produce 2 units of MgO.

• 1 atom of Mg reacts with 1 atom of O to produce a unit of MgO that contains 2 atoms.

Tags

NGSS.MS-PS1-5

In terms of energy, how would you classify the following chemical reaction? 2Cu + O₂ → 2CuO + 315 kJ

• endothermic

• exothermic

• both endothermic and exothermic

• neither endothermic nor exothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which of the following is NOT a property of an acid?

• tastes sour

• corrosive with a metal

• below 7 on the pH scale

• feels slippery

The SI unit of power is the

• joule.

• newton.

• newton-meter.

• watt.

A person drives north 6 blocks, then turns west, and drives 6 blocks. The driver then turns south and drives 6 blocks. How could the driver have made the distance shorter while maintaining the same displacement?

• by driving west 6 blocks from the starting point

• by driving north 4 block and west 7 blocks

• by driving south 6 blocks from the starting point

• by driving back to the starting point by the same route

The rate at which velocity changes is called

• speed.

• vectors.

• acceleration.

• motion.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

An inclined plane wrapped around a cylinder can be described as a(n) what?

• Screw

• Wedge

• Pulley

• Lever