Radioactive Dating
Uranium-238 decays into Lead-206. How many half lives have passed if there is 50% Uranium and 50% Lead.
One.
This principle states that an intrusion is younger than what it crosses.
Cross-Cutting Relationships
This layer of the atmosphere, our weather is found in.
Troposphere
This type of volcano is the least explosive.
Shield
This was the name of the supercontinent
Pangea
An alien radioactive isotope has a half-life of 745 years. If you start with a sample of 32 kg, how much would be left in 437 years?
21.31 kg
This principle states that older layers are found below newer ones.
Principle of Superposition
In this layer, we find the ozone layer.
Stratosphere
This type of volcano is the most explosive.
Cinder Cone Volcano
This is how the Hawaiian Islands were formed.
Hot Spot Volcanoes
What percent of Carbon-14 would remain after 9 half lives?
0.1953%
This rule states that sedimentary deposits form horizontal-layers.
Principle of Original Horizontality
In this layer, temperature increases as altitude increases.
Stratosphere, Thermosphere
This area of the Earth is famous for it's active volcanoes, found in the pacific.
Pacific Ring of Fire
This part of the cell controls and regulates all activities of the cell.
Nucleus
A 254 g. sample of Sodium-24 decays to 7.94 g. of Sodium 24 in 75 hours. What is the half life of this isotope?
15 hours
This is a process in which a denser plate dives beneath another plate and sinks.
Subduction
In this layer, temperature decreases as altitude increases.
Troposphere, Mesosphere
This type of volcano has a low gas content.
Shield
This part of the chromosome holds chromatids together.
Centromere
A scientist finds a bone and after some tests, discovers it contains 3.125% Uranium-238. If a half live of Uranium is 4.5 billion years, how old is the bone?
22.5 Billion Years
Look at the image: What is the order of rock layers in terms of age from OLDEST to youngest.
In this layer of the atmosphere, objects entering Earth start to burn up.
Mesosphere
This type of volcano produces lava, pumice, and ash when it erupts.
Composite Volcano
S-Waves have an average speed of 4.1 km/s. How long would it take an S-Wave to travel 350 km?
85.37 s.