4th grade Science Review: Energy, Soil, and Natural Resources

What would happen to this system if part B was removed?

• Only the microphone would be affected.

• Only one of the speakers would work.

• The speakers would function at a lower level.

• There would be not energy for the system to function.

All of the following forms of energy are used or produced after a lamp is turned on EXCEPT

• electrical energy

• light energy

• mechanical energy

• thermal energy

What form of energy is used to play instruments?

• Mechanical energy

• Thermal energy

• Light energy

• Sound energy

All of these, a hair dryer, a toaster, and a coffee maker, are being used to convert-

• sound energy to electrical energy

• electrical energy to thermal energy

• thermal energy to electrical energy

• sound energy to thermal energy

Which describes how energy changes when the switch is turned on?

• from electrical to sound

• from mechanical to sound

• from mechanical to electrical

• from electrical to mechanical

Which soil will most likely have the smallest particles?

• clay soil

• topsoil

• sandy soil

• They all have the same-sized particles

What conclusions can be drawn from the data given in the graph?

• Soil type 2 is made of nutrient and humus rich soil and is the best for supporting plant life.

• Soil type 3 is made of nutrient and humus rich soil and is the best for supporting plant life.

• Soil type 1 is made of nutrient and humus rich soil and is the best for supporting plant life.

Which soil sample would you predict to be clay soil?

• Soil #1

• Soil #2

• Soil #3

• Soil #4

Which of the above soil samples would you predict to be sandy soil?

• Soil #1

• Soil #2

• Soil #3

• Soil #4

How can you find out the amount of water that stayed in the soil of each pot?

• by adding the amount of each soil sample to the volume of water poured in

• by subtracting the volume of water collected from the volume poured in

• by multiplying the volume of water poured in by the number of soil

  samples

• by dividing the total volume of water poured in by the number of samples