LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
LT 5 EH Practice
Grade: «grade»
Subject:Science
Date:«date»
Mar 17­7:39 PM
1
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
1 Which fossil could be used as an index fossil?
A B C D Mar 17­7:41 PM
2
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
2 Which location contains the oldest fossils?
A 1
B 2
C 3 Mar 17­7:46 PM
3
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
3 Which location contains the youngest fossils?
A 1
B 2
C 3
Mar 17­7:50 PM
4
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
4 Which outcrop contains the youngest rock layer? A Outcrop A B Outcrop B C Outcrop C Mar 8­9:52 PM
5
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
5 Which layer is the oldest?
A H B U
C C D S
Mar 8­9:45 PM
6
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
6 Which outcrop contains the youngest fossils?
A (W) B (Y) C (X) Mar 17­8:49 PM
7
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
LT ­ 5
Answers to Questions 1 ­ 6
1. C
2. A
3. B
4. A
5. D
6. C
Mar 20­11:04 AM
8
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
LT 6 Fossils and EH Practice
Grade: «grade»
Subject:Science
Date:«date»
Mar 18­12:24 PM
9
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
1 How many half­lives have passed if 1/8 of the original parent radioactive isotope remains?
A 1
B 2
C 3
D 4
Mar 17­8:56 PM
10
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
2 If 1/4 of the C­14 remains in a fossil sample, how old is the fossil?
A 5,700 years old
B 11,400 years old
C 17, 800 years old
D 23,500 years old
Mar 17­9:09 PM
11
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
3 What percent of the parent isotope would remain if the sample contained 12.5 % of daughter isotope?
A 12.5%
B 50%
C 75%
D 87.5%
Mar 17­9:16 PM
12
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
4 After 2 half lives, about what percent of parent isotope would remain in a sample?
A 25
B 50
C 75
D 100
Mar 17­9:19 PM
13
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
5 A fossil sample contains a ratio of 5:15 parent to daughter atoms. If the isotope has a half­life of 2500 years, how old is the sample?
A 2500 yrs.
B 5000 yrs.
C 7500 yrs.
D 10000 yrs.
Mar 17­9:20 PM
14
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
6 A fossil sample contains a ratio of 10:10 parent to daughter atoms. If the half­life of the parent isotope is 5000 years, what is the age of the sample?
A 2500 years
B 5000 years
C 7500 years
D 10,000 years
Mar 17­9:39 PM
15
LT 5 and 6 Fossils and EH Practice 2015 with Answers.notebook
March 20, 2015
LT ­ 6
Answers to questions 1­6
1. C
2. B
3. D
4. A
5. B
6. B
Mar 20­11:05 AM
16