Deck 5: Energy

Question 1

A(n) _____ is a device that converts DC electricity into AC electricity.​​

A) ​rectifier​
B) ​semiconductor​
C) ​inverter
D) ​condenser​

Answer 1

C

Question 2

The pressure compelling an electron to move is called _____ .​

A) ​wattage
B) ​resistance
C) ​voltage​
D) ​current

Answer 2

C

Question 3

Burning a piece of wood converts _____ into thermal and electromagnetic energy by providing heat and light.​

A) ​potential kinetic​
B) ​stored chemical energy
C) ​stored electromagnetic​
D) ​gravitational potential​

Answer 3

B

Question 4

The act of using energy is a process of consumption.

Question 5

_____ energy includes the stored energy associated with food, gasoline, matches, and batteries.​​​

A) ​Nuclear​
B) ​Biological​
C) ​Electromagnetic​
D) ​Chemical

Question 6

​Electricity easily converts into other forms and is, therefore, considered _____ .​

A) ​low-grade energy​
B) ​high-grade energy​
C) ​thermal energy​
D) ​potential thermodynamic energy​

Question 7

Biomass energy can be derived from _____ .​​

A) ​evaporating water​
B) ​municipal garbage​
C) ​prehistoric plants
D) ​decay of radioactive elements​

Question 8

_____ represents the rate of using energy-that is, the amount of energy used over an interval of time.​​

A) ​Pressure
B) ​Power​
C) ​Current​
D) ​Voltage​

Question 9

The total electrical energy used during a process can be shown as _____ .​​

A) ​Energy = Voltage x Time​
B) ​Energy = Power x Quantity of flow​
C) ​Energy = Voltage x Current​
D) ​Energy = Power x Time

Question 10

Electricity is the movement of electrons.

Question 11

Geothermal energy _____ .​​

A) ​​results from gravitational forces acting on the earth
B) ​releases millions of years of stored carbon into the atmosphere​
C) ​drives the tectonic motions of the continents​
D) ​​is derived from agricultural products and other organic materials​

Question 12

Which of the following statements about energy conversion is true?​​

A) ​Photosynthesis in a leaf converts potential chemical energy into electromagnetic energy when utilizing sunlight to make carbohydrates.
B) ​A ceiling fan converts kinetic energy into electromagnetic energy by moving air with rotating blades.​
C) ​The whirling impeller of a pump converts electric energy into electromagnetic energy by lifting water into an elevated tank.​
D) ​A solar cell converts the electromagnetic energy of sunlight into electricity.​

Question 13

An instrument used to determine the degree of shading at a particular site is called a _____ .

A) ​shadow caster
B) ​solar pathfinder
C) ​shading plotter
D) ​shadow pathfinder

Question 14

As the coal ignites and its chemical energy converts to thermal energy, some of the heat necessarily escapes up the smokestack to carry away flue gases (shown as a 14% loss, meaning _____ ) .​

A) ​86% of the thermal energy is still available to boil water​
B) ​14% of the thermal energy is still available to boil water​
C) ​86% of the thermal energy is unavailable for use in any form​
D) ​14% of the thermal energy is unavailable for use in any form​

Question 15

The earth's tilt causes the sun's altitude to vary by _____ between summer and winter.​

A) ​23.5°​
B) ​41°​
C) ​43.5°​
D) ​47°​

Question 16

All energy-whether derived from wood, water, wind, or fossil fuels-comes from a single ultimate source: sunlight.

Question 17

Although energy can be converted from any form into any other, it will tend to move to a form that is less organized than the original.

Question 18

The sun delivers more energy to the earth in an hour than all of humanity consumes in a year.

Question 19

AC electricity would include _____ .​

A) ​household electricity​
B) ​batteries​
C) ​photovoltaic panels​
D) ​lightning

Question 20

_____ energy is the energy of motion.​​

A) ​Kinetic​
B) ​Nuclear​
C) ​Gravitational​
D) ​Electrical