Earth Science stuff
more rocks n stizz
Specific Heat
Temperature and Thermal Energy
randos
100
Which rheological layer of the earth exhibits plasticity and undergoes heat transfer via convection?
the asthenosphere
100
Chemical formula for quartz?
SiO2
100
The process of a liquid becoming a gas is known as
Evaporation (or vaporization)
100
Define temperature
The measure of the average kinetic energy of an object's particles.
100
Provide an example of radiation.
Getting sunburnt, holding your hands near a fire, sitting in a tanning bed...
200
Complete the definition:
A mineral is _____________.
a naturally occurring crystalline solid.
200
Name at least 2 units of energy!
joules, calories
200
What happens to the temperature of the substance as it undergoes a phase change?
The temperature stays constant during a phase change.
200
How would you compare the kinetic energy of particles between a gas and a solid?
The energy in a gas' particles are higher than that of a solid.
200
This graph shows reactants absorbing energy. What type of reaction is this?
The heat is being absorbed in the system. Therefore, this is considered as an endothermic reaction.
300
The picture above illustrates that _______ is the primary motivator of plate motion.
Convection
300
This is the Thingvellir fracture zone in Iceland, which is a rift valley. A rift is where the land is being pulled apart. What type of plate boundary most likely exists here?
Divergent Plate Boundaries, a rift forms, when two plates are moving away from each other.
300
Calculate the heat required to melt 205 g of Ice.
Given that Water's ΔHvap: 2257 J/g
Water's ΔHfus: 333.6 J/g
Values can be negative depending on the phase change
Useful Equations
Q = mHvap
Q = mHfus
68,400 J
300
quantity of heat needed to change the temperature of 1 g of a substance by 1 degree Celsius
specific heat (c)
300
Based on your knowledge of rocks, what is the name of this rock?
granite (or granitoid)
400
What type of plate boundary exists between the North American Plate and the Eurasian Plate?
a divergent boundary.
400
This natural disaster is a result of the release of elastic energy due to blocks slipping along a fault plane.
EARTHQUAKE!!
400
How much energy is required to raise 50.0 grams of iron by 55°C? The specific heat of iron is 0.444 J/g°C.
Q = mcDeltaT
= (50.0g)(0.444J/(g°C))(55°C)
= 1220 J
400
When 2 different temperature objects are placed in close proximity to each other, energy flows from the ______ object to the ______ one.
energy moves from the warmer object to the cooler one.
400
Green mineral commonly found in earth's mantle.
Olivine
500
Along certain parts of the Ring of Fire, the Pacific Plate is converging with the North American Plate and is being sucked into the mantle. What is this called?
subduction zone
500
Convection occurs in which of earth's layers? (there's more than one)
Outer core and mantle (asthenosphere)
500
How much energy is released when 25.0 grams of aluminum metal is cooled from 125°C to 35°C? The specific heat of aluminum is 0.900 J/g°C.
Useful Equations
Q=mcDeltaT
Answer is -2030 J
500
When you place a piece of ice on a piece of plastic and a piece of aluminum that are both the same temperature, you notice that the ice melts faster on the aluminum. What property of the aluminum is responsible for this phenomenon?
Aluminum's thermal conductivity is higher than plastic's!
500
Mr. Ly touched some magma, and it really hurt! The magma imparted 2,356 calories of energy to Mr. Ly's skin, and it raised the temperature of his skin by 45 C. Mr Ly. weighs about 80 kg... what is his specific heat in cal/g C?
.0006544 cal /g C