the top or broadest level of the classification

Light waves travel at a rate of about

A. 186,000 miles per hour B. 186,000 miles per minute C. 18,600 miles per hour D. 186,000 miles per second[x]

The human heart includes

A. 2 chambers B. 3 chambers C. 4 chambers[x] D. 5 chambers

The largest planet in the solar system is

A. Earth B. Mars C. Saturn D. Jupiter [x]

Which planet is named after the Greek god who personified the sky?

A. Earth B. Mars C. Pluto D. Uranus[x]

Not counting the sun, the closest star to the Earth is

A. Rigel B. Proxima Centauri[x] C. Antares D. Betelgeuse

Which planet is the brightest object in the sky, aside from the sun and moon?

A. Saturn B. Pluto C. Venus[x] D. Mercury

The asteroid belt is located

A. around Mercury B. between Mars and Jupiter[x] C. inside the orbit of Venus D. There is no such thing as an asteroid belt

What is the most abundant element, by mass, in the Earth's crust?

A. carbon B. oxygen [x] C. gold D. salt

The intestines are part of the

A. circulatory system B. nervous system C. respiratory system D. digestive system [x]

Of the levels listed, the top or broadest level of the classification system for living organisms is called the

A. class B. phylum C. kingdom [x] D. genus

Osmosis is

A. diffusion of water[x] B. transfer of oxygen C. low blood sugar D. protein

A measureable amount of protein can be found in all of the following foods EXCEPT

A. eggs B. meat C. peas D. apples[x]

Joints that hold bones firmly together are called

A. hinge joints B. ball and socket joints C. fixed joints[x] D. pivot joints

How many planets in the solar system have rings?

A. one B. two C. three D. four[x]

The atmosphere of Mars is composed mostly of

A. oxygen B. carbon dioxide[x] C. helium D. Mars has no atmosphere

White blood cells

A. produce antibodies B. fight infections C. carry oxygen and carbon dioxide D. both A and B[x]

What is a single unit of quanta called?

A. quantum[x] B. quantumonium C. quantus D. quanfactorial