Explanation

Mass media refers to a diverse array of media technologies that reach a large audience via mass communication. 

Explanation

Light rays from the sun appear to the naked eye as white light, but each ray contains a broad range of wavelengths

Explanation

Explanation

Because the Earth rotates on its axis, circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. This deflection is called the Coriolis effect. 

Explanation

Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below.

The stratosphere is very dry; air there contains little water vapor. 

Explanation

The geographic grid refers to the internationally-recognized system of latitude and longitude used to location positions on Earth's surface.

Explanation

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.

Explanation

The Earth rotates on its own axis and it rotates in the eastward direction and in a counter-clockwise in prograde motion.

Explanation

Earth is closest to the sun every year in early January, when it's winter for the Northern Hemisphere.

Earth is farthest away from the sun in early July, during our Northern Hemisphere summer.

Explanation

Scotsman John Dunlop developed the first practical pneumatic tire in 1888.