1. Precambrian Era
a. The Precambrian Era is Earth's first era of time.
b. It began with the creation of the Earth around 4.6
billion years ago and lasted until 570 million years ago.
c. The Precambrian saw many drastic changes during this
2. What a
1. Longitude and Latitude
a. Lines of Longitude run north to South and are read east to
b. Lines of Latitude run east to West but are read north to
c. Longitude and Latitude help us find were we are at any
place on the Earth.
d. Latitude 0 de
1. Mesozoic Era
a. The Mesozoic Era existed from 225 mya to 65
b. The Mesozoic Era is divided into three periods of
time. These periods are: the Triassic, Jurassic and
c. When was the Triassic Period?
i. Triassic 225 mya to 195 mya
1. Paleozoic Era
a. This Era began when the Precambrian era ended.
b. There was an explosion of life marking the
beginning of the Paleozoic.
i. Paleozoic means ancient life. There are six
periods within the Paleozoic Era.
ii. These periods include the Cam
a. Rivers are classified as young, mature and old.
b. Young rivers have a V shaped channel and flow
i. They typically are strong downward cutting
and fast flowing and carried heavy and large
size load particles
c. Mature rivers flow sl
1. Rock Cycle
a. All rocks begin as igneous rocks accept
b. Igneous Rocks are form from magma or lava,
which is liquid rock.
c. Once this liquid cools and harden igneous rocks
d. Secondly, after igneous rocks are formed th
1. Anticlines and Synclines
a. Are the top of folded beds of rock
b. Anticlines represent the high areas above the
c. It is created by the compression of rebound as a
depressed area is raised back up after being push
i. For example,
1. What are the different types of volcanoes?
a. Shield Volcanoes
i. Largest with heights up to 40,00 plus feet
ii. These volcanoes have very runny lava and are
very quiet and nonviolent in eruptions
b. Composite volcanoes
i. Are very violent in nature
1. What is Streak?
a. A mineral property
b. It is created when a mineral is scratched on a piece
of unglazed tile
c. The mark left behind is called the streak
d. However streaks dont always reflect the visible
color of the mineral so streak is not a good
1. What is a scale?
a. A scale is where a smaller distance equals a much
larger distance on a map
i. For example 1cm = 10miles
ii. A map 10 cm long would represent 100 miles in
2. What are Sand Dunes?
a. Its created by wind deposits.
b. They can