Weathering
Soil Conservaton
Volcanoes
Lava
Causes of Volcanic Eruptions
100
is the process in which rocks break down.
What is weathering
100
can take many years to form. It is not easy to replace.
What is soil
100
is any place where gases and magma, or melted rock, come out of the ground
What is a volcano
100
is lava that forms a thick, brittle crust as it cools
What is As
100
there are many volcanoes on the plate boundaries surrounding the Pacific Ocean. This area is called
What is ring of fire
200
is one agent of mechanical weathering, cycles of freezing and thawing
What is ice
200
Soil can be damaged if it is
What is overused
200
Magma escapes from the volcano through openings in the Earth’s crust called
What is vents
200
is lava that forms a thin, flexible crust as it cools.
What is Pahoehoe
200
tectonic plates move away from each other. This boundary is called
What is divergent plate boundary
300
is a kind of mechanical weathering that happens when rocks are worn away by contact with other rocks.
What is abrasion
300
If plants can’t grow somewhere because the soil is infertile, the area can become a desert. This process is called what
What is desertification
300
When magma flows onto the Earth’s surface, it is called
What is lava
300
is lava that erupts under water. As it cools, it forms rounded lumps that look like pillows
What is pillow lava
300
the tectonic plates collide and cause these boundaries
What is convergent plate boundaries
400
happens when rocks break down because of chemical reactions
What is chemical weathering
400
Another cause of soil loss is
What is erosion
400
volcanic eruptions are the most common type of eruption
What is non explosive
400
is hardened magma that is blasted into the air.
What is pyroclastic material
400
Molten means
What is melted
500
Rain, sleet, or snow that contains more acid than normal is called
What is acid precipitation
500
Farming can cause
What is soil damage
500
During these eruptions, clouds of hot ash, gas, and rock fragments shoot rapidly out of a volcano.
What is explosive eruptions
500
the body of molten rock that feeds a volcano
What is magma chamber
500
The most frequent type of volcanic eruption
What is non explosive
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