Only recently have ___ become the main energy source in the U.S.

In the nineteenth century, with the westward expansion of railroads, ____ gained popularity as a fuel

One way to preserve our current energy resources is to increase the ____ of our energy use.

Another way to preserve those resources is to ____ energy whenever possible

For most of human history, people burned ____ for light, heat, and energy.

People harnessed the power of renewable resources such as ____

In the mid-twentieth century, ____ joined coal as the dominant fuel.

As fossil fuel supplies decrease, interest has increased in looking for ____ energy soures.

____ is the percentage of energy that is actually used to perform work.

____ means reducing energy use.

Teachers: Create FREE classroom games with your questions Click for more info!
©2007-2024 Review Game Zone | About | Privacy | Contact | Terms | Site Map