Test Review
Topics of the test:
- Geological Time
- Fossils
- Relative Dating
- Absolute Dating
Question 1
Question 2
Question 3
Question 4
• You find a strange fossil and are trying to
determine its age. You know that it started
with 80 grams of carbon. It loses half of that
every 6,000 years. The fossil currently has 20
grams of carbon. Determine how old the fossil
must be.
• You find a strange fossil and are trying to
determine its age. You know that it started
with 80 grams of carbon. It loses half of that
every 6,000 years. The fossil currently has 20
grams of carbon. Determine how old the fossil
must be.
12,000 years
Question 5
The _________ was an era dominated by the
dinosaurs
The _________ was an era dominated by the
dinosaurs
Mesozoic
Question 6
Which of the following represents the longest
time period
Precambrian
Paleozoic
Mesozoic
Cenozoic
Which of the following represents the longest
time period
Precambrian
Question 7
What is the current accepted age of Earth?
• 200 million years
• 4.6 Billion years
• 10 billion years
• 20.5 million years
What is the current accepted age of Earth?
• 4.6 Billion years
Question 8
Which of the following gases was NOT part of
the Earths original atmosphere?
• Water vapor
• Oxygen
• Nitrogen
• Carbon Dioxide
Which of the following gases was NOT part of
the Earths original atmosphere?
• Oxygen
Question 9
Which title best describes the current geological
age?
• Age of _____________
Which title best describes the current geological
age?
• Age of mammals
Question 10
If a sample has 1000g of a radioactive isotope,
how much will be left after 3 half lives?
• 500g
• 150g
• 125g
• 250g
If a sample has 1000g of a radioactive isotope,
how much will be left after 3 half lives?
• 125g
Question 11
An undeformed sedimentary layer is
__________ than the layer above and _______
than the layer below.
younger ---younger
younger --- older
older --- younger
older --- older
An undeformed sedimentary layer is
__________ than the layer above and _______
than the layer below.
older --- younger
Question 12
Fossils are most common in which rock types?
Fossils are most common in which rock types?
sedimentary
Question 13
What is the name for an erosion surface that
separates two sets of sedimentary layers with
non-parallel bedding planes?
cross-bedding
formation
angular unconformity
fault
What is the name for an erosion surface that
separates two sets of sedimentary layers with
non-parallel bedding planes?
angular unconformity
Question 14
A rock formed with 1,000 atoms of a radioactive
parent element, but only contains 250
radioactive parent atoms today. If the half-life is
1,000,000 years, how old is the rock?
250,000 years
500,000 years
1,000,000 years
2,000,000 years
A rock formed with 1,000 atoms of a radioactive
parent element, but only contains 250
radioactive parent atoms today. If the half-life is
1,000,000 years, how old is the rock?
2,000,000 years
Question 15
Which of the following will not make a fossil?
decomposed organic material
plant impressions (casts)
animal footprints
loose animal bones
Which of the following will not make a fossil?
decomposed organic material
Question 16
A nonconformity is _________ .
A. a rock unit that is different than units above
or below it
B. a gap in the geologic record bounded below
by metamorphic or igneous rocks and bounded
above by sedimentary rocks
C. a rock unit that does not contain fossils
D. a sequence of rocks that does not contain any
gaps in the geologic record
A nonconformity is _________ .
B. a gap in the geologic record bounded below
by metamorphic or igneous rocks and bounded
above by sedimentary rocks
Question 17
• Which of the following units is the youngest?
• Which of the following units is the youngest?
A
Question 18
Which of the following units is the oldest?
Which of the following units is the oldest?
F
Question 19
Which of the following happened most recently?
deposition of unit C
deposition of unit B
deposition of unit F
tilting of C,D,E, and F
Which of the following happened most recently?
deposition of unit B
Question 20
Which of the following radioactive isotopes has
the longest half-life?
rubidium-87
potassium-40
carbon-14
uranium-238
Which of the following radioactive isotopes has
the longest half-life?
uranium-238
Question 21
Which of the following radioactive isotopes has
the shortest half-life?
rubidium-87
potassium-40
carbon-14
uranium-238
Which of the following radioactive isotopes has
the shortest half-life?
carbon-14
Question 22
Human beings evolved during which geologic
era?
Human beings evolved during which geologic
era?
Cenozoic
Question 23
Large reptiles became abundant during the
________Era?
Large reptiles became abundant during the
________Era?
Mesozoic
Question 24
Land plants appeared during the ________Era?
Land plants appeared during the ________Era?
Paleozoic
Question 25
B
C
A
F
D
E
1st period winners
1: Emma, Adam, Alexis, Jackie - 5
2:Chloe, Lance, Mateo, David - 3
3: Adolfo, Charlie, Junior, Nathan - 2
2nd period winners
• 1st place: Justin, Safiya, Brandon, Chastity
• 2nd: Orion
• 3rd: Allison, Victoria, Marcos, Peyton