How do we know that Earth's magnetic field originates deep within Earth?
What will be an ideal response?
The resemblance of Earth's magnetic field with the pattern from a bar magnet only works if the magnet producing the field is deep within Earth.
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The layer of quartzite in this photograph would mostly weather by
A) dissolution.
B) hydrolysis.
C) physical weathering.
D) spontaneous combustion.
Large cloud droplets fall faster than small cloud droplets because gravity acts more strongly on larger droplets
a. True b. False
Irrigation can result in the salinization of soils because ________
A) irrigation is typically used in areas where windblown salts from sea spray can accumulate when the protective vegetation is removed B) many of the plants grown in these regions excrete salts into the soil C) the irrigation water washes away soil leaving behind concentrated salts D) salts in the water are deposited on the soil surface as water evaporates E) shortages of fresh water require the use of saltwater for irrigation
Which rock type is formed from magma, for example, granite and basalt?
a. Sedimentary b. Igneous c. Metamorphic d. Phosphorus