HW 2 Flashcards
How old is earth?
4.56 billion years
Plate tectonics is essential for life to exist as we know it.
True
Which of the following is correct about Earth’s magnetic field?
The field reverses irregularly, between magnetic north and south
The __________ is the region of the Earth System inhabited by life.
biosphere
The __________ is the layers of gases that surrounds the planet.
atmosphere
The ___________ is the Earth’s solid and liquid water realm
hydrosphere
The ___________ is the solid Earth from its surface to its center.
geosphere
What percent of Earth’s surface is covered by ocean?
70%
A ________ is a naturally occurring, inorganic, crystalline solid, with a definite chemical composition.
mineral
A rock is a naturally occurring solid consisting of mineral grains.
true
Which of the following is not a class of rocks?
Crystals
Only Earth’s continents move while Earth’s seafloor stays stationary during geologic time.
False
All of the following is evidence for what?
1) Shape of the continents
2) Correlating rocks, fossils, and mountain ranges
3) Generation of recycling of seafloor
4) Movement of Earth’s lithosphere
Plate Tectonics
The “missing link” and driving force to the theory of plate tectonics was what?
Seafloor Spreading and subduction
Most earthquakes and volcanoes are along plate boundaries.
True
