Dating History:
Will You Go Out With Me? Check Yes or No!
Don't be so Dense
FINAL JEOPARDY
100
This type of dating compares layers, fossils, and other clues to determine which event occurred before the other. It does not give specific dates.
What is relative dating.
100
What is the formula for density?
D = mass/volume
100
1. Fossils are primarily found in what type (not specific examples) of rock? 2. Put the rock layers in order of oldest to youngest.
1. Sedimentary 2.
200
The amount of time it takes for half of the radioactive material in rocks to decay.
Half-life
200
1. Continental crust meets oceanic. Which one is subducted? 2. Oceanic meets oceanic, which one is subducted?
1. Oceanic because it is denser that continental. 2. The denser of the two oceanic plates will be subducted.
300
This law of geology says that older rocks are found on the bottom of a geologic column and younger rocks are at the top.
Law of Superposition.
300
A bar of soap is 12 cm tall, 5 cm wide, and 2 cm long. It has a mass of 480 grams. What is the density of the bar of soap.
240 g/cm3 (must have units labeled) The volume is lxwxh or 12x5x4 for a total of 240 cm3. Using the density formula of D=mass/volume (or D=m/v), 480/240 = 2.0 g/cm3......You must have the label otherwise it could mean anything, such as you average 2.0 boogers picked per day.
400
How can you explain fossils of clams and other marine life that are found on high mountain peaks?
Uplifting has occurred.
400
What is the density of water?
What is 1.0g/mL
500
This geologic law states that geologic process occur the same way today as they did in the past. For example, when a volcano erupts, magma pours out and cools into an extrusive rock. This process occurred the same way many years ago.
Law of Uniformitarianism. I remember this by thinking of a sports uniform. They are all the same and look the same, just like the processes of the geology are the same in both past and present.
500
Desert Ironwood has a density of 1.15 g/cm3. Will it sink or float in water?
Sink. The density is greater than water (1.0 g/mL) so it will sink. If a substance has a greater density, it will sink. Most wood has a density less than 1.0 g/mL, but there are about two dozen varieties that have a density greater than 1 g/mL. Also remember that g/mL refers to liquid, and g/cm3 refers to solids. They both occupy the same volume!
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