The oldest known fossils of the genus Homo (humans) date from about how long ago?
Blog
Rocks are classified into three types on the basis of their…
Rocks are classified into three types on the basis of their _____.
A hurricane watch is issued when
A hurricane watch is issued when
Match the type cloud with its description.
Match the type cloud with its description.
Ions trapped in Earth’s magnetic field give rise to
Ions trapped in Earth’s magnetic field give rise to
In order going from the Earth’s surface up toward space, the…
In order going from the Earth’s surface up toward space, the atmospheric layers are
The conterminous United States lies predominantly in which w…
The conterminous United States lies predominantly in which wind zone?
Chemically combining a fuel with oxygen (O2) to release heat…
Chemically combining a fuel with oxygen (O2) to release heat is known as
The physical characteristic that is used to distinguish intr…
The physical characteristic that is used to distinguish intrusive igneous rocks from extrusive igneous rocks is _____________.
Alfred Wegener speculated that the present continents were o…
Alfred Wegener speculated that the present continents were once part of a single supercontinent that he named __________ that broke apart about 200 million years ago allowing its sections to somehow drift into their present locations.