What does it mean that a source of energy is nonrenewable?

Question

With proper administration, it can be reused.
It does not create pollution when used.
Once used, it needs to be reprocessed for reuse.
There is only a limited supply that can be used.

Answer 1

A nonrenewable source of energy refers to a type of energy source that exists in finite quantities and cannot be replenished or regenerated within a human timescale. This means that once these resources are depleted, they cannot be replaced or will take millions of years to form again.

The correct interpretation from your options is: "There is only a limited supply that can be used."

Nonrenewable energy sources include fossil fuels (like coal, oil, and natural gas) and nuclear fuels (like uranium), all of which will eventually run out as they are consumed. Unlike renewable energy sources (such as solar, wind, and hydro), nonrenewable sources are not sustainable in the long term.

Answer 2

Crude oil was formed millions of years ago from the remains of living things. Where is crude oil found today?
inside living things that have died
under dry land and under the ocean
inside rocks
floating in the ocean

Answer 3

Crude oil is primarily found under dry land and under the ocean. It is located within geological formations known as sedimentary rocks, which can be found both onshore and offshore. Crude oil is formed from the remains of ancient marine organisms that were buried under layers of sediment over millions of years and subjected to heat and pressure, leading to the formation of oil deposits.

Answer 4

Which fuel creates the most air pollution when burned?
natural gas
coal
electricity
clean fuels

Answer 5

Among the options provided, coal creates the most air pollution when burned.

When coal is burned for energy, it releases a significant amount of carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen oxides (NOx), particulate matter, and other harmful pollutants. This contributes to air quality degradation, smog formation, and health issues.

In comparison, natural gas burns cleaner and produces fewer emissions, while electricity's pollution level depends on how the electricity is generated (e.g., from coal, natural gas, renewable sources, etc.). Clean fuels are generally designed to minimize pollution.

Answer 6

When were fossil fuels formed?
millions of years ago
hundreds of years ago
tens of years ago
tens of billions of years ago

Answer 7

Fossil fuels were formed millions of years ago. Specifically, they originated from the remains of ancient plants and animals that were buried under layers of sediment and subjected to heat and pressure over geological timescales. This process typically took place over tens of millions to hundreds of millions of years.