About Earth
by: Faith S.
What evidence is there that the plates have moved?
Well the first piece of evidence is because there are fault lines. A fault line is a line on a rock surface or the ground that traces a geological fault. Also by earthquakes and convection currents . The plates are Continental plates and Oceanic plates. The types of boundaries are strike-slip, normal fault, and reverse fault. The way's that plates move are by radiation, conduction, and convection.
This is a comet hitting earths surface
This comet can cause craters in the earths surface. One comet that hit earth made a crater now known today as the grand canon.
This is an asteroid hitting earths surface
Did you know that asteroids can cause a dent and a crater on earths surface. This can cause powerful waves and maybe even storms.
This is a tornado changing earths surface
This tornado can cause mud slides and land slides. also tornadoes can bring up soil from the ground and eventually cause erosion.
About Erosion
Facts about erosion
Erosion is the process of eroding or being eroded by wind, water, or other natural causes. The three types of erosion are surface erosion, Mass- movement erosion, and fluvial erosion. The erosion that can cause the most damage to earths surface is mass-movement erosion. The erosion that can cause the least damage to earths surface is surface damage.
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About Fossils
What is the the law of superpostition
Superposition is a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.
How can fossils tell us about earths history?
Fossils can give us info about the early years of earth. They can also give us info about extinct animals.
Are all fossils the same?
No, because you never see two of one fossil they may be similar but not the same. Also by the age, shape and more.
Rocks and Minerals
Igneous rock
A type of rock that forms from the cooling of molten rock at or below the surface.
Sedimentary rock
This rock forms when particles of other rocks or the remains of plants and animals are pressed and cemented together
Metamorphic rock
This rock forms from an existing rock and is changed by heat, pressure, or chemical reactions.
The rock cycle
A series of processes on the surface and inside earth that slowly changes rocks from one kind to another.
Minerals
One way that minerals are formed is by the cooling of magma. Another way minerals are formed is by re-crystallization and living cells. We identify minerals is by color, luster, streak, hardness, cleavage, and specific gravity.
What I liked
What i liked about this unit is when i got to explore the rocks is Mrs. Johnson's rock box. I also liked it when we got to use the i pads and see what our birth stone was.