Smog is caused by smoke and:

The science of the atmosphere and of the weather is called:

The discharge of waste heat or the return of heated water to rivers and lakes is:

The saltiness of the sea is measured in terms of its:

Precipitation in the form of hexagonal-shaped ice crystals is:

Which of the following has the highest value in the Heat Budget Equation for oceans?

A vent in the earth’s crust through which rocks, ash, molten rock, etc. are ejected is called:

The layer of the earth’s interior containing mostly iron and nickel is:

The most violent storm is a:

The acrosome contains enzymes used to__________.