Unit 4 Review

What is required for a circuit to function properly?

• A power source and a closed circuit

• A power source and an open circuit

• Only a power source

• Only a closed circuit

What does the circuit symbol for a battery look like?

• A single line

• A circle with a line through it

• Two parallel lines with one shorter than the other

• Two overlapping circles

What happens when a circuit breaker activates?

• The circuit remains unchanged

• The electricity is cut off from the power supply

• The current increases

• The circuit permanently closes

What are the units used to measure electrical resistance?

• Amps

• Volts

• Watts

• Ohms

According to Ohm's Law, what is the voltage if a resistance of 12 ohms produces a current of 60 amperes?

• 720 V

• 60 V

• 12 V

• 5 V

What does Ohm's law state about the relationship between voltage, resistance, and current in a circuit?

• The voltage of a circuit equals the sum of the resistance and the current.

• The voltage of a circuit equals the resistance times the current.

• The voltage of a circuit is inversely proportional to the product of resistance and current.

• The voltage of a circuit decreases as the resistance increases, regardless of the current.

What typically happens in a short circuit regarding the resistance and current?

• The resistance increases and the current decreases.

• The resistance decreases to nearly zero and the current increases to an unsafe level.

• Both resistance and current increase to unsafe levels.

• Both resistance and current decrease significantly.

Why is it important to use the identify and interpret strategy when analyzing graphs?

• To confirm our assumptions and predictions about the data.

• To separate the data and make natural predictions without analyzing the data.

• To help us analyze graphs so that we separate what the data shows us and the predictions we naturally make.

• To directly develop new investigations without interpreting the data.

Tags

NGSS.MS-PS3-1

According to the graph, which energy source had the highest consumption value from 1950 onwards?

• Natural gas

• Coal

• Petroleum

• Nuclear

What is the primary input for the energy transfer diagram shown?

• Coal and oil

• River water and gas

• Solar energy and wind

• Biomass and geothermal energy

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3