Semester Review Quiz

A skateboarder is going down as hill. As he accelerates towards the bottom, the amount of kinetic energy

• increases.

• decreases.

• stays the same.

• increases then descreases.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

When an electric alarm clock goes off, energy transformations occur. What are these energy transformations?

• electrical to magnetic to sound

• electrical to mechanical to sound

• electrical to mechanical to light

• chemical to electrical to mechanical

Identify the pure substances.

• V

• I and II

• II

• III and V

Tags

NGSS.MS-PS1-1

A ball is rolling down a hill. Select the graph that represents the change in potential and kinetic energy.

• Graph A

• Graph B

• Graph C

• Graph D

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What does Point A represent in the pendulum's swing?

• Kinetic Energy is at its maximum.

• Kinetic Energy is at its minimum.

• Potential Energy is at its maximum.

• Kinetic Energy and Potential Energy are equal.

Tags

NGSS.MS-PS3-2

Select 2 of the following investigations that explore a chemical property of matter.

• Investigation: Take an ice cube and set it into a beaker of boiling water. Observation: The ice cube quickly melts and becomes indistinguishable.

• Investigation: Combine two clear liquids in a 500 mL beaker. Observation: The two chemicals together turn pale yellow.

• Investigation: Hold a flame next to a substance. Observation: The substance catches on fire.

• Investigation: Drop a 45 g substance into a graduated cylinder of water. Observation: The water rises from 20 mL to 49 mL.

• Investigation: Slowly bring an unknown substance to a boil and record the temperature. Observation: The substance began boiling at 100°C.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An unknown silvery metal solid cube is found in the junk door of your home. To help identify what the metal could be, you find that the density of a metal by preforming the water displacement method. You determine the density is approximately 10.5 g/cm³. What is the MOST LIKELY identity of the metal?

• aluminum

• zinc

• silver

• mercury

Tags

NGSS.MS-PS1-2

Which is a sign of a chemical change?

• A popsicle left at room temperature melts.

• Sodium chloride (salt) is dissolved in water and disappears.

• Clothes in the dryer become dry and are not longer wet.

• When hydrogen sulfide gas is added into a lead acetate solution, it bubbles and a precipitate forms.

Tags

NGSS.MS-PS1-2

A thermometer is removed from a beaker of boiling water and placed in a beaker of room temperature water. The thermometer takes 15 seconds to reach a reading of 25°C. The same thermometer is returned to the boiling water for several minutes. It is then placed under a tap of running water at room temperature. The thermometer takes only 10 seconds to reach a reading of 25°C. What conclusion could you make about conduction and convection based on these observations?

• Conduction is a more efficient method of heat transfer.

• Convection is a more efficient method of heat transfer.

• Conduction and convection are equally efficient methods of heat transfer.

• Conduction and convection are inefficient methods of heat transfer. Radiation is most efficient.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The following instructions are given:

1. 1. Place an empty water bottle on the table and remove the lid.

2. 2. Carefully pour 10 ml of vinegar into the bottle.

3. 3. Open up the mouth of the balloon and have your lab partner spoon 1 teaspoon of baking soda into the balloon.

4. 4. Without spilling any of the baking soda, stretch the mouth of the balloon over the mouth of the bottle.

5. 5. Turn the balloon completely upright so that the baking soda inside the balloon pours into the bottle with the vinegar.

6. 6. Observe.

7. Result: As the baking soda dissolved in the vinegar, the balloon expanded and filled with a gas. Explain what type of reaction occurred, and give a reason why.

• This was a chemical because a gas was produced.

• This was a physical reaction because the baking soda dissolved in the vinegar.

• This was a physical reaction because a gas was produced.

• This was a chemical reaction because the baking soda disappeared.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5