Unit 2 Energy Concepts

Javier is designing a container to hold cold items. Which substance should Javier use to best insulate the container?

Copper, Air, glass, Iron

• iron, because it requires a very little energy for iron to change temperatures

• glass, because it requires a lot of energy for glass to change temperatures

• copper, because if requires very little energy for copper to change temperatures

• air, because it requires a lot of energy for air to change temperatures

Tags

NGSS.MS-PS3-3

How does the motion of the atoms in the spoon change when the spoon is placed in the hot coffee?

• The atoms vibrate slower due to the conduction of heat through atoms in the spoon

• The atoms vibrate faster due to the conduction of heat through atoms in the spoon.

• The atoms move away from each other due to the convection of heat through atoms in the spoon.

• The atoms move closer toward each other due to the radiation of heat through atoms in the spoon.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which of the following does temperature measure?

• the average kinetic energy of the particles that make up an object

• the electrical energy that is present in an object

• the state of matter that an object is in

• the mass and volume of an object

Tags

NGSS.MS-PS1-4

Why are most oven mitts made out of cloth?

• Cloth is the only material available to make oven mitts.

• Cloth is an insulator and cannot conduct heat.

• Cloth is a conductor and blocks the heat.

• Cloth cools a pan down as soon as it is touched.

Tags

NGSS.MS-PS3-3

There are two windmills near Brittany's town. Brittany wonders which one converts more wind energy into mechanical energy. What is the best way for Brittany to find out which windmill generates more mechanical energy?

• Find out which windmill was built more recently.

• Count how many times each windmill spins in one minute

• Stand next to each windmill to feel where the wind is strongest.

• Measure the height of each windmill.

When baking a cake, why are cake pans made out of metal?

• Another material would be too heavy to use

• Another material would melt in the oven.

• Metal conducts heat very well.

• Metal makes the cake taste better.

Tags

NGSS.MS-PS3-3

Which best describes the way particles move to heat objects using conduction?

• Fast moving particles in warm objects collide with electromagnetic waves.

• Objects generate electromagnetic waves are carried away from the object emitting them.

• Fast-moving particles collide with slower moving particles transferring their heat energy.

• Particles expand with thermal energy, hot air rises and pushes cooler air down through circulation.

Transfer of thermal energy in circulation within fluids is a

• sublimation current.

• convection current

• radiation current

• conduction current

Tags

NGSS.MS-ESS2-6

Which is NOT a method of heat transfer through molecular motion?

• conduction

• sublimation

• convection

• radiation

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of the following does temperature measure?

• the average kinetic energy of the particles that make up an object

• the mass and volume of an object

• the state of matter that an object is in

• the electrical energy that is present in an object

Tags

NGSS.MS-PS3-4