Life of natural disasters
Aliza Riggins
plate tectonics
The evidence i have that plate tectonics move is in the book the first picture all of the continents are all together but the second picture it shows them slowly drifting out. The last picture shows the continents not touching. This happens because pieces of earths lithosphere are moving slowly driven by convection currents in the mantle. Plate tectonics explains the formation. movement, and subduction. During subduction gravity pulls one edge of a plate down into the mantle. The rest of the plates also move.
Tornado
A tornado swirls up houses and other building into a circle and destroying every thing in its path.
Earthquake
A earthquake shakes the earth and makes erosion happen. Erosion breaks down minerals and makes them into little pebbles.
Volcano
A volcano is boiling lava and ash spilling out of a volcano. The lava comes from the magma chamber inside of the volcano. Lava is magma but out of the volcano.
Erosion
types of erosion
Erosion happens mostly during a earthquake where a big piece of rock or mineral breaks into little piece's. the three types of erosion is deposition, Compaction, Cementation. The worst erosion is deposition. The one that causes least change to earth is cementation.
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fossils
We can tell what kind of animal it was and if there are any animals that we didn't know about in the past.
law of superposition
The law of superposition tells how old the fossils are.
Different fossils
All fossils are not the same. They can come from insects and all different animals
Rock and roll into minerals
It starts out with a igneous rock and by weathering and erosion that rock then turns into a sedimentary rock with heat and pressure what used to be a sedimentary rock then turns into a metamorphic rock and by heating the rock goes back into a igneous rock.
metamorphic
This is a metamorphic it is made from heat and pressure.
Igneous
This rock is made from lava cooling and staying in the same place.
Sedimentary
This rock is made from resting in the bottom of the sea and when rocks make a layer and keep forming over the rock with pressure off rocks combining.
minerals
There are two ways minerals form one way is when hot magma cools into earths crust. The second way is by crystallization. we can test minerals to see what kind of mineral it is. One way to test minerals is to scratch it. A another way to test minerals is to rub it against another mineral.
What I Liked
I liked that using smore and the new program.