Absolute Aging
What is it called when an atom of an element has the same number of protons and neutrons?
Unstable isotope
There are two types of plates. These are called
1. Oceanic Crust
2. Continental Crust
What is created when two continental plates collide?
Mountains
Which plate sinks when an oceanic and a continental plate collide?
Oceanic plate
The giant landmass name when scientist believed all contents were combined
Pangaea
On your white board show the proton AND neutron count for Carbon-12, Carbon-13 and Carbon-14
Carbon-12 has 6p+6n
Carbon-13 has 6p+7n
Carbon-14 has 6p+8n
What are the three layers of earth when using the compositional model?
+50 pts: Compositional is the _______ _______ version.
Crust, mantle and core
+50 pts: common sense
What landform is created at hotspots?
Volcanoes
What is created when an oceanic and continental plate collide? (4 possible answers, give me 2)
ocean trench, mountain, volcanoes or subduction zone
When a unstable isotope turns into a stable isotope
radioactive decay
DAILY DOUBLE
1.Using the periodic table, give the proton count and neutron count of Au-159
2. Is it stable or unstable?
3. followup question
Proton= 79
Neutron= 80
Unstable
**Lose one neutron
What are the layers earth when looking at the structural model?
1. Lithosphere
2. Asthenosphere
3. Mesosphere
4. Outer Core
5. Inner Core
Which plate boundary type has the most frequent earthquakes?
Transform
Which type of plate boundary is responsible for seafloor spreading?
Divergent plate boundary
A sudden and violent shaking of the ground
earthquake
How do scientists determine how old the ocean floor is?
1. By looking at the ratio of parent to daughter isotopes
2. By looking at the magnetic fields of the ocean floor
Explain how the plates move due to the asthenosphere.
The magma in the asthenosphere gets hot because of the core and it rises toward the plates, it then cools when near the plates and sinks back down. This creates thermal convection which causes the plates to bump into each other.
Name and distinguish the land features in this picture.
What type of plate boundary is this?
Rift valley = crack in crust
mid ocean ridge = new mountains/crust
divergent plate boundary
Do hotspots occur on a plate boundary line? If so, which one?
No, they are weak areas in the middle of the plates.
The study of rocks and inner earth
Geology
Why is the core so hot?
There is radioactive decay happening in the core, which releases energy in the form of heat
What are the outer core and inner core made of?
What phase (solid, liquid or gas) are each of them?
Made of iron and nickel
Outer core is liquid and the inner core is solid
Which landform is the deeps part of the crust?
Trench
Explain how seafloor spreading occurs
1. Thermal Convection moves divergent plates apart
2. a crack (rift valley is formed)
3. Magma rises up and cools in the rift valley creating ocean ridges.
People who study the earth and rocks
Geologist