Download Notes_for_Rock_and_Weathering_Final_Test

Notes for Rock and Weathering Final Test
Rocks are a mixture of minerals giving them different colored specks
and markings.
The 3 groups of rocks are sedimentary, metamorphic, and igneous.
They have different conditions under which they form:
1. sedimentary- sediments from weathering, erosion, layering,
pressure and time
2. metamorphic- sediments under great heat and pressure over
millions of years.
3. igneous- melted molten materials, cools, hardens to a solid
Sediments- formed by wind, rain, moving water and waves, and
glacier movement over millions of years.
4 types of sediments are clay, sand, silt, and pebbles.
Similarities- all are sediments, formed by weathering, small pieces
of particles, and are made from materials of the Earth.
Differences- particles have different sizes, colors, and textures,
some float or sink, some retain water or allow water to pass through
it.
Chemical Weathering- when the composition of rocks changes.
Some of the agents of chemical weathering are acid rain, carbon
dioxide, and water. Examples we did in class is the chalk in vinegar,
and the rusting of steel wool.
Erosion- is the movement of weathered sediments by water, wind,
lava flow, and glaciers.
Soil- Earth's materials made of sediments from rocks,
microorganisms (small living creatures), and decomposing organic
materials (dead grass, twigs, leaves. etc.) that can be separated.
In our class activity we found that the smaller the particle size the
least amount of water drained through so soils with a high amount of
clay have poor drainage and form puddles.
Destructive and constructive forces- volcanoes can be both, in
destroying surrounding areas. It can also build up land, make rocks,
and create islands.