Question

Which term best describes Styrofoam?

A. metal mixture

B. raw material

C. nonmetal mixture

D. synthetic material
Answer
Which statement explains how heat causes materials to expand?

A. Lower temperatures decrease the kinetic energy of the particles, which causes the particles to move less and take up more space.

B. Higher temperatures increase the kinetic energy of the particles, which causes the particles to move more and take up more space.

C. Lower temperatures increase the kinetic energy of the particles, which causes the particles to spread out.

D. Higher temperatures increase the kinetic energy of the particles, which causes the particles to pack closely together.
Answer
Which statement about materials used as insulators and conductors is correct?

A. Conductors prevent electricity from transferring between materials.

B. Insulators can have a higher voltage than conductors.

C. Insulators are made to let electrons flow more easily.

D. Conductors allow for more electric current than insulators.
Answer
How does a light bulb function as a resistor?

A. It amplifies or increases the electric current, changing the energy into the light it emits.

B. It passes the electric current through it, changing the energy into light.

C. It functions as a closed loop in which energy passes from one end to the other, producing light along the way.

D. It blocks or decreases the electric current, changing the energy into the light it produces.
Answer
Which material listed would be the best choice as a conductor?

A. gold

B. Styrofoam

C. rubber

D. salt water
Answer
A contractor selects heavier trusses for a house, increasing the load that the walls must support. Which change will the contractor need to make to the design?

A. increase the thickness of the wall material

B. increase the electrical wiring in the wall

C. increase the amount of insulation in the wall

D. increase the overall weight to the roof
Answered by GPT 3.5
D. synthetic material
Answered by GPT 3.5
B. Higher temperatures increase the kinetic energy of the particles, which causes the particles to move more and take up more space.
Answered by GPT 3.5
D. Conductors allow for more electric current than insulators.
Answered by GPT 3.5
D. It blocks or decreases the electric current, changing the energy into the light it produces.
Answered by GPT 3.5
A. gold
Answered by GPT 3.5
A. increase the thickness of the wall material