What is basalt?
Practice Flashcard: FOSS Earth History Investigations 5 & 6 Review

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Science
•
6th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Basalt is a black igneous rock that forms from the rapid cooling of lava, typically with no visible crystals.
2.
FLASHCARD QUESTION
Front
How do igneous rocks form?
Back
Igneous rocks form when molten rock (magma or lava) cools and solidifies. If it cools quickly above ground, it may have small or no crystals; if it cools slowly underground, it may have larger crystals.
3.
FLASHCARD QUESTION
Front
What is the Ring of Fire?
Back
The Ring of Fire is a major area in the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur due to tectonic plate boundaries.
4.
FLASHCARD QUESTION
Front
What causes earthquakes?
Back
Earthquakes are caused by the movement of tectonic plates, which can slide past each other, collide, or pull apart.
5.
FLASHCARD QUESTION
Front
What is convection?
Back
Convection is the cycle of moving material caused by the rise of less-dense material and the sinking of denser material, often seen in fluids.
6.
FLASHCARD QUESTION
Front
What is the significance of crystal size in rocks?
Back
The size of crystals in a rock can indicate how quickly the rock cooled; larger crystals suggest slow cooling, while smaller crystals suggest rapid cooling.
7.
FLASHCARD QUESTION
Front
What is tectonic plate movement?
Back
Tectonic plate movement refers to the shifting of the Earth's lithosphere, which can lead to geological events like earthquakes and volcanic eruptions.
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