Sol Review

Which energy transformation occurs first in a coal-burning power plant?

• Chemical energy to thermal energy.

• Thermal energy to mechanical energy.

• Thermal energy to electrical energy.

• Mechanical energy to electrical energy.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of these best describes the particle motion taking place as CO₂ gas is exposed to freezing temperatures?

• The particles decrease in speed.

• The particles move with more force.

• The motion of the particles becomes random.

• The motion of the particles is unchanged.

Tags

NGSS.MS-PS1-4

A metal spoon was placed in a dish of ice cream and became cool. Which correctly describes the heat transfer process that resulted in the cooling of the spoon?

• Conduction, because the spoon was in contact with the cold ice cream.

• Convection, because the spoon was in contact with the cold ice cream.

• Conduction, because cold air currents affected the temperature of the spoon.

• Convection, because cold air currents affected the temperature of the spoon.

Tags

NGSS.MS-PS1-4

Which is the result of using a more powerful motor to run an elevator?

• The same amount of work is done in less time.

• Less work is done in the same amount of time.

• The same amount of time is needed to move the same distance.

• A longer time is needed to move a shorter distance.

Tags

NGSS.MS-PS3-5

The state of matter found in lightning
(a)  

• plasma

• solid

• liquid

• gas

Answer explanation

Plasma is the fourth state of matter and is made of gas. Atoms are the smallest pieces of all matter. When energy is added to a gas, its atoms get very excited and become ions when the outer electrons of atoms break off, creating plasma

In which state of matter are the molecules moving the fastest?

Answer explanation

Molecules in a solid vibrate and move slowly compared to the molecules in a liquid or gas.

Tags

NGSS.MS-PS1-4

Which part of visible light has the shortest wavelength?

Tags

NGSS.MS-PS4-1

Which of these properties of an unknown liquid can be found using a beaker, hot plate, and a temperature probe?

• Density

• Oxygen level

• Boiling point

• Chemical composition

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which change will most likely increase the strength of a magnetic field produced by an electromagnet?

• Reduce the number of turns in the coil.

• Switch the direction in which the battery is connected.

• Remove the iron nail.

• Add a battery.

Tags

NGSS.MS-PS2-3

Students measure the amount of an unknown substance that dissolved in water at different temperatures. What was the independent variable in this investigation?

• Amount of substance dissolved

• Unknown substance used

• Water temperature

• Water volume

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4