A utility compares equal-output plants: one burns natural gas and one is run-of-river hydroelectric. What comparison is correct?

A town compares rooftop solar photovoltaic panels with a coal-burning power plant. What operating difference matters most?

A western town compares geothermal power with wind power. What site limitation is correctly matched?

A power district compares biomass pellets with coal for a steam plant. What comparison is accurate?

A planner compares a uranium-fueled nuclear plant with a coal plant. What comparison is correct?

A grid operator compares reservoir hydropower with solar PV for evening demand. What difference helps explain the choice?

A plant manager compares coal and natural gas for electricity generation. Which fuel usually emits less CO₂ per kilowatthour when burned?

A wind farm and a hydroelectric station both spin turbines. What moving material drives each turbine?

Use the pie chart of U.S. primary energy consumption. Which source has the largest share?

Use the capacity-factor bar graph. Which technology runs closest to its rated output across a year?

Use the copper-grade bar graph. Which mine sample has the highest copper concentration?

The graph plots depth from land surface to a monitoring well's water table. In what year was the water table deepest below ground?

Use the electricity-generation pie chart. What two sources together equal the natural gas share?

Use the geothermal generation chart. Which state supplies the largest share of the listed U.S. geothermal electricity?

Use the monthly solar-output graph. How much more electricity was generated in July than in January?

Use the water-budget table. At what time does demand exceed supply by the largest amount?

In the coal-formation sequence, what process belongs in the blank step that turns buried plant material into coal?

The diagram shows marine plankton buried under sediment before oil and gas form. Why is oxygen-poor burial important?

In the reservoir cross section, porous sandstone lies beneath shale in an arch. What feature keeps petroleum from migrating to the surface?

The cross section shows gas above oil and water below oil in a petroleum trap. What explains that vertical order?

Use the burial table. Which layer is most likely still peat rather than coal?

A fault places porous sandstone against shale in a gas-bearing basin. Why can this fault help trap natural gas?

Use the aquifer-material table. Which material will deliver water to a well most readily?

Use the rock-yield table. Which rock is the better aquifer for a municipal well?

Use the ore table. Which deposit contains the greatest mass of copper?

Two mine-waste piles have the same tonnage. Which pile is the better rare-earth resource target?

The specimen shows rounded pebble-sized clasts cemented together. Compared with shale, why is this rock more useful as aggregate?

Use the water-source table. Which source needs more salt removal before it can be used as drinking water?

Use the county hurricane table. What fraction of the landfalls were major hurricanes?

Use the earthquake table. By how many earthquakes per decade did the listed rate increase from the 2000s to the 2010s?

Use the stream-gauge table. What fraction of the monitored spring days were above flood stage?

Use the wildfire inspection table. What percent of inspected homes had not cleared defensible space?

Use the landslide table. What was the average debris-flow rate over the three years?

Use the ashfall table. What fraction of towns received more than 5 cm of volcanic ash?

Use Route A in the tsunami evacuation table. What average walking speed is needed?

A tornado warning is issued while students are at school. Where should the class shelter to reduce injury risk?

An earthquake begins while a lab group is indoors. What immediate response best reduces injury from falling objects?

A driver reaches a road covered by fast-moving floodwater. What response best reduces risk?

A neighborhood is in a wildfire-prone wildland-urban interface. What preparation best lowers risk before fire season?

People on a coast feel a long, strong earthquake and then receive a tsunami warning. What action fits the hazard?