At the beginning of the twentieth century, the world's population was about _________. One hundred years later, there were roughly _________ people in the world.
-1 billion; 4 billion 0
-.5 billion; 3 billion 0
-2 billion; 10 billion
-.2 billion; 1 billion
-1.6 billion; 6 billion
1.6 billion; 6 billion
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When you remove a cold beverage from a refrigerator in a humid room, water vapour condenses on the sides of the container. Does this condensation act to warm or cool the beverage, or does it have no effect on the beverage's temperature?
What will be an ideal response?
Where did the atoms that make up a newborn baby originate?
A) in the womb of the baby's mother B) in the digestion of the food that the mother ate C) in the earth through geological processes D) in the explosions of ancient stars
Soils developed with materials carried from distant source areas by flowing wind, water or ice are called ___ soils.
a) laterite b) bauxite c) latitudinal d) transported e) residual
Charged particles (mainly protons and electrons) from the Sun can flow along lines of the Sun's magnetic field millions of miles into space in what is called the ____
a. corona b. aurora australis c. solar wind d. solar constant e. longwave radiation