How does geomagnetism provide support for seafloor spreading? Mantle hot spots are always oriented to the magnetic field. The ocean floor is uniformly old, preserving the Earth's 4.6 billion history including past reversals in polarity. Isotopic analysis of ocean core sediments help determine sea floor age and this can be used to infer past magnetism. The oldest oceanic crust is always found near mid-ocean ridges. As one moves out from these ridges, the crust is simultaneously younger and oriented according to the polarity at the time. Magnetic particles in basalt orient with the magnetic field in force at the time the oceanic lava cooled and hardened;the magnetic pattern is the same on both sides of the ridge.

Which soil was produced by meteorites hitting the basalt on the Moon's surface? A Orange soil B Highland soil C Breccia D Mare soil

What evidence do geologists use to explain the age of the Earth? (select all correct responses) Slow weathering of rocks Layers of rock (oldest at the bottom) radiation from the sun radioactive decay

Continental lithosphere is more dense/heavier than oceanic lithosphere and will always sink beneath the oceanic lithosphere. True False

Hot spots are plumes of upwelling mantle that move over time. are linked to plate boundaries. create lines of volcanic islands, such as Hawaii. cannot be explained by plate-tectonic theory.

The rocks and minerals of the earth consist of square compounds.

What is not true about a globe? ) Globes are always at a large spatial scale. The edges of the visible half are distorted on a globe. It's impossible to show very much detail on a globe. Only half a globe can be viewed at a time.

This is the world's most populated urban center. A. Tokyo B. Shanghai C. Hong Kong D. Seoul

22. Which of the inner planets has the hottest average surface temperature? Mercury Venus Earth Mars

A scientist finds a piece of rock in a crater. He analyzes the rock and realizes that the composition is mostly of iron and nickel. He claims that he found a meteor. What is most likely the scientist's error? He actually found a meteorite His analysis of the composition is not correct. He incorrectly used the term "crater." He actually found a meteoroid

Hot Questions

Which type of volcanic wock is formed from volcanic ash? obsidian tuff basalt diorite

__ is a type of basaltic lava flow that is diffuse and earthy. Pahoehoe Aa Thephra pillow lava

The flow of glaciers is best described as __ erratic turbulent corrosive nocturnal nonerosive

5. Which event is a direct result of Earth's revolution? (1) the apparent deflection of winds (2) the changing of the Moon phases (3) the seasonal changes in constellations viewed in the night sky (4) the daily rising and setting of the sun

Peru is the third largest producer of what precious metal? zinc gold silver copper

¿Qué ocurre con el centro de gravedad cuando se elevan los brazos de elevación? El centro de gravedad no cambia El centro de gravedad se eleva a medida que se levanta la carga El centro de gravedad baja en relación con el movimiento de los brazos de elevación

Multiple Choice Question The time that the Sun crosses the meridian on the sky (the line running from north to south) is __ midnight sunrise sunset noon

How does the Coriolis effect influence global wind patterns? A. It causes winds to blow toward the poles in both the northern and southern hemispheres. B. It causes winds to be deflected to the right in both the northern and southern hemispheres. C. It causes winds to blow westward in the southern hemisphere and eastward in the northern hemisphere. D. It causes winds to be deflected to the left in the southern hemisphere and to the right in the northern hemisphere.

Which of the land masses found within Oceania provided the most terrestrial resources to humans? High Volcanic Islands The Tundra Coral Atolls Continental Landmasses

Question 5 (0.5 points) A Granite might metamorphose into a(n) __ Serpentinite Marble Gneiss Anthracite