8th Grade Benchmark 2 Practice

How do particles in a solid move?

• Do not move past each other

• Stick together when they collide

• Remain in a fixed position

• Chaotic

Tags

NGSS.MS-PS1-1

How do you know when a chemical reaction has occurred?

• Chemical changed to a different state of matter

• Chemical change temperature

• Chemical turned a different color

• Chemical change shape

Tags

NGSS.MS-PS1-2

If a mixture is filtered, separating the blue precipitate from the resulting liquid, what has occurred?

• The resulting mixture changed form.

• A chemical change occurred.

• A physical change occurred.

• A change of state has occurred.

Nicole and Sasha are preparing supper for their family.  They are preparing their mom’s favorite meal of fried chicken, baked potatoes, green beans and rolls.  The potatoes are ready before the rest of the meal.  Sasha thinks the potatoes will get cold before it’s time to serve the meal and wants to find a way to keep them warm.  Nicole suggests several solutions to keep the potatoes warm.  She tests her solutions and collects the following data.  

Item Potato is wrapped in Time for potato to cool down

Aluminum foil 20 mins

Cotton Cloth 5 mins

Plastic Wrap 10 mins

Wax Paper 3 mins

Which statement is the best explanation for the data?

• The kinetic energy from the potato is transferred into the foil and plastic wrap at a faster rate than that of the cotton cloth and wax paper.

• The aluminum foil and plastic wrap conduct heat better than the cotton cloth and wax paper.

• 
  The potato’s kinetic energy is being transferred to the cotton cloth and wax paper at a faster rate than that of the aluminum foil and plastic wrap.

• 
  The cotton cloth and wax paper do not conduct heat but the aluminum foil and plastic wrap do.

Tags

NGSS.MS-PS3-3

As an object cools down, what happens?

• Its kinetic energy increases.

• More kinetic energy is created.

• Its kinetic energy is transferred to another object.

• Its kinetic energy is destroyed.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Adam and Betty are sailing off the Pacific Ocean. Adam claims that the sailboat’s motion is based on kinetic energy being transferred to the sailboat and that the motion of the sailboat is impacted by the kinetic energy that is added or removed from the sailboat.

• Waves hit the side of the boat which transfers kinetic energy to the boat and causes it to slow down.

• When rain pours straight down on the boat, kinetic energy is transferred to the sailboat and the boat increases it speed.

• Kinetic energy is transferred to the boat when wind hits the sail and causes it to speed up.

• Using the underwater fin, to turn the sailboat to the right, cause it to lose kinetic energy as it slows down and turns.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Kinetic energy can be added or removed to slow or speed up an object.

• True

• False

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

If an object plunges into the ocean, which statement describes the main energy transformation that occurs

• Thermal energy is transformed into chemical energy.

• 
  Radiant energy is transformed into mechanical energy.

• Potential energy is transformed into kinetic energy.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

How does energy flow through a solar cooker?

• Energy flows from the air inside the solar cooker, through the sides of the cook pot, and to the water.

• Energy flows from the air outside the solar cooker to the air inside the solar cooker.

• Energy flows from the air outside the solar cooker, through the sides of the solar cooker, and to the air inside the solar cooker.

• Energy flows from the air inside the solar cooker, through the sides of the solar cooker, and to the air outside the solar cooker.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What can you change about the design of a solar cooker, that would make the water in the cook pot boil faster?

• Adjusting the reflector as the Sun moves throughout the day.

• Using the solar cooker when the outside temperature is cooler.

• Increasing the volume of water in the cook pot.

• Changing the interior walls to white instead of black.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4