If you are located at 35 north latitude, you will experience a situation where the sun is directly overhead (at 90 degrees) twice a year.

The presence of greenhouse gasses make it possible for life forms to exist on the surface of the earth.  This happens because the gasses act to stabilize the earth’s temperature

When the temperature of the air increases, this causes the mercury contained in a mercury thermometer to expand and rise in the column of the thermometer.

The color of the sky at sunset is caused by the fact that insolation must travel through more atmosphere resulting in a greater amount of scattering.

Infrared EMR is what causes sunburns in humans.

The presence of cloud coverage will result in warmer than normal daytime temperatures and cooler than normal nighttime temperatures.

Alternative versions of a particular gene are known as _____.

ADH or vasopressin controls the retention of fluid, while aldosterone controls the retention of sodium.

Antidiuretic hormone (ADH) is released in response to _____.

Compared with carrying out a simple movement like foot tapping, performing precise and complicated movements requires greater use of the _____.