Download earth history makeup bellwork

Earth History
Makeup Bellwork
Bellwork
1.)Deposition is the____ of
sediment over time.
2.) Stratification is the ____ of
sediment.
Use the cross section diagram to the right to
answer the following questions:
3) Which rock layer is the
oldest???
4) Which rock layer is the
youngest???
5) Can you put the rock layers
in order from oldest to
youngest?
Answer Bank
accumulation
Lithification
layering
deposition
Bellwork
1) The oldest rock is
at letter____.
2) A fault is located at
position____.
3) Magma intrusion
is located at letter
____.
4) The youngest rock
is at location ____.
5) An unconformity is
located at letters
_____ & ____.
6) Put the letters in
order from oldest
 to youngest
Bellwork
1) Please the events in
order: oldest to
youngest.
2) A fault is located at
position____.
3) A rock has ¼ of
original amount of
parent material left.
How many halflives of that isotope
have passed since
the rock formed?
4) Scientists use
radioactive decay to
measure _____time
Answer bank
1
2
Absolute
relative
A,B,C,L,K
A
P
J
M
B
K
U
X
E
Z
H
Bellwork
1) _____ _____is most responsible for
adding oxygen into the Earth’s early
atmosphere.
2) The _____ Era was dominated by
reptiles and the ____ Era was dominated
by mammals.
3) An igneous rock contains a radioactive
isotope with a ½ life of 10 million yrs.
Absolute dating shows ¼ of the original
concentration of the parent isotope is left.
The igneous rock is _____million yrs old
4) About 90 percent of Earth’s history is
within the _______era
Answer Bank
mesozoic
Photosynthetic
Bacteria
paleozoic
20
precambrian
30