Read the quote from Abraham Lincoln below.

A house divided against itself cannot stand.

The “house” that Lincoln mentions is a reference to
the federal government.
the Northern slave trade.
freed enslaved people.
Kansas and Nebraska.

study of past cultures

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.

incident infrared radiation is blocked. visible and ultraviolet radiation heat   earth.

earth radiates infrared radiation. infrared radiation is blocked and heats earth. visible and shortwave radiation heat earth.

earth radiates longwave radiation

longwave radiation is reflected downward longwave radiation heats earth