G8 Science Checkpoint 9

Energy due to motion is ____________ energy.

• Potential

• Energy

• Kinetic

• Friction

Energy can not be created or destroyed, only converted from one form to another.

• true

• false

Piriya connects an electrical circuit.

The 2Ω, 3Ω and 4Ω components are resistors in parallel.

A1 = 1.8 amps, A2 = 0.8 amps , and A3 = 0.6 amps.

Which choice completes the readings on the other 2 ammeters.

• A4 =;0.6 amps; A5 = 1.8 amps

• A4 =;0.4 amps; A5 = 1.8 amps

• A4 =;0.8 amps; A5 = 2.0 amps

• A4 =;0.8 amps; A5 = 3.2 amps

People who walk across snow may wear snowshoes.

Which of the following statements is correct?

• The person does not sink into the snow because the force acts on a larger volume so that the density is less.

• The person does not sink into the snow because the volume acts on a larger density so that the is force is less.

• The person does not sink into the snow because the force acts on a larger area so that the pressure is less.

• The person does not sink into the snow because the force acts on a larger area so that the density is less.

The diagram shows the energy flow into and out of a coal-fired power station.

How much useful electrical energy is provided by the power station?

• 1000 MJ

• 300 MJ

• 70 MJ

• 1400 MJ

This is a question about forces.

Look at the diagrams.

Which diagrams show a turning force?

• A and C

• A and E

• A and B

• D and E

What are the missing terms in these energy transformation diagrams?

• a) = sound; b) = wind; c) = heat; d) = light.

• a) = kinetic; b) = solar; c) = heat; d) = heat.

• a) = wind; b) = solar; c) = sound; d) = heat.

• a) = kinetic; b) = solar; c) = heat; d) = light.

Metals are good conductors of electricity because

• they contain free electrons
• the atoms are lightly packed 
• they have high melting point
• all of the above

Tags

NGSS.HS-PS1-1

Light energy is transformed into chemical energy during which process?

• Photosynthesis
• Homeostasis
• Waste removal
• Cell Theory Process

What is the product of photosynthesis?

• solar energy
• carbon dioxide
• glucose
• water