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EARTH SCIENCE!!! PLEASE!?

1. Which of the following best describes the use of relative dating?(Points : 3)
a. to determine the date on which a prehistoric event occurred
b. to calculate how many years ago a certain geologic event occurred
c. to determine the age of a rock in years
d. to determine the sequential order in which prehistoric and geologic events occurred


2. Which principle tells us that in a sedimentary sequence the youngest unit is on the top?(Points : 3)
a. lateral continuity
b. original horizontality
c. faunal succession
d. superposition


3. Which principle tells us that rock layers separated by a valley, but otherwise similar, are assumed to have once been continuous?(Points : 3)
a. superposition
b. faunal succession
c. original horizontality
d. lateral continuity


5. Fossils can give us clues about a particular environment's past climate and geography, but they cannot be used to delineate the relative ages of rocks.(Points : 2)
a. True
b. False


6. Which of the following scientists is known for developing the principle of cross-cutting relationships?(Points : 3)
a. Nicolaus Steno
b. Charles Darwin
c. Charles Lyell
d. James Hutton


7. To be a useful index fossil, the organism should have been rare when it lived on Earth.(Points : 2)
a. True
b. False


8. An igneous intrusion that cuts through a layer of sedimentary rock must be older than the sedimentary rock it cuts through.(Points : 2)
a. True
b. False