General science questions – Test 16

Plants get their nitrogen from

Which of the following elements was unknown to ancient civilizations?

Which is the longest?

You use a hydrometer to check the condition of the electrolyte in your car battery. It is actually measuring what property of the fluid?

Steel is composed of a number of elements. The two essential elements are iron and

Which of the following is an important element of stainless steel?

Which of the following is not a major pollutant from automobiles?

The most serious environmental pollution from a nuclear reactor is

Biomass energy is

A temperature of 295 K is equivalent to approximately