Magma Silica

Does the picture show the formation of magma or lava?

• Magma because it is formed under the Earth's surface in the upper mantle and lower crust

• Lava because it is formed on the Earth's surface

• True

• False

True or False. Magma is composed of a slushy mixture of molten rock, mineral crystals, and dissolved gases.

• True

• False

Magma is made of minerals that make up the Earth's crust. Some of these minerals are Aluminum (Al), Iron (Fe), Calcium (Ca), Sodium (Na), Potassium (K), Magnesium (Mg) and:

• H₂ gas and Sulfur (S)

• F₂ gas and Argon (Ar)

• O₂ and Silicon (Si)

• Cl₂ and Uranium (U)

Tags

NGSS.MS-PS1-1

What happens to the pressure the further you go down into the Earth's crust and mantle?

• It decreases because there isn't that much rock above to push down (from above)

• It increases because the weight of the rock above presses down

What factors influence magma formation?

• Heat

• Pressure

• Water content

• All of the above

Tags

NGSS.HS-ESS2-3

How does pressure change with depth?

• It decreases

• It does not change

• It increases

How does higher water content affect the rock's melting point?

• Water lower's the rock's melting point

• Water raises the rock's melting point

• Water actually has no affect on melting point

Which term describes the "decreased pressure that lowers the melting point of rocks" deep in the Earth?

• decompression melting

• divergence

• pressure melting

What type of rock is formed when magma cools and becomes solid?

• igneous
• metamorphic
• sedimentary
• candy