All of these comprised the radioactive material during the creation of the earth, except:
Select one:
a. Potassium
b. Uranium
c. Iron
d. Thorium

In what section of the atmosphere do space shuttles orbit? :
Select one:
a. Mesosphere
b. Tropopause
c. Thermosphere
d. Troposphere

The outer layer, or crust, is thinner than other layers. :
Select one:
a. Yes
b. No

How many kilometers deep is the mantle? :
Select one:
a. 2,900 km
b. 5,600 km
c. 4,567 km
d. 3,980 km

It was ________ who stated that the universe is still expanding :
Select one:
a. Isaac Newton
b. C. Fred Hoyle
c. Albert Einstein
d. Edward Hubble

These two planets are cool because they are farther from the sun. :
Select one:
a. Saturn and Mars
b. Saturn and Jupiter
c. Saturn and Pluto
d. Mars and Pluto

The depressions on the surface of the earth is where water acummulated. :
Select one:
a. Yes
b. No

The mantle has the following subdivisions, except:
Select one:
a. Middle
b. Transitional
c. Lower
d. Upper

The Steady State Theory arose when? :
Select one:
a. 1950s
b. 1960s
c. 1940s
d. 1970s
Question 30


When molecules collide, heat forms. :
Select one:
a. Yes
b. No