The earliest and easiest type of transportation in Pennsylvania was by water.

a. True

b. False

Barometers have long been used to predict the weather. Jay and Jeff were recording the class weather data each day in March. One day, they noticed that barometric pressure dropped down very, very quickly.

What percentage of the world's species is likely to become extinct during this century, largely as a result of human activities?

If earth rotated twice as fast as it currently does, but its motion around the sun stayed the same, then

On average, the people of sub-saharan africa have large families. truefalse

70% of the population of China lives on only one fourth of the land true or false

When we speak of "characteristic" we're referring to

What observation about this mid-ocean ridge diagram below was used to support Wegener's hypothesis of continental drift? Magma is very close to the surface at the rift. Sediments become thicker with increasing distance from the rift.

What did the countries in the triangular trade do?

Which phrases/sentences are true for colors found on the color wheel?

What does it mean for a livestock animal to be "sound"?