Questions tagged [homework]
If your question is part of your high school or college/university homework, please use this tag. Do not use this as the only tag on a question. It signifies that instead of a direct answer, care should be taken to explaining the steps to the solution, preferably sticking to just giving helpful, conceptual hints. This tag may be applied to questions which are not homework but are similar to a homework problem.
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Form Lines from Strike and Dip measurements
I am looking to draw form lines on this map based on the strike and dip measurements taken on site. From what I have gathered it is an anticline with a possible second fault to the right hand side. ...
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1
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Complete missing outcrop problem
Given A is upper limit of sand stone, B is the lower limit of the planes that are equal in distance and dip. Dip angle is 29 degrees.
Complete the outcrop of this map.
—————————————————————————-
Now I ...
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1
answer
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Relation between Magnitude of Greenhouse Effect and the Concentration of GHGs like $CO_2$
The Average Surface Temperature of the Earth is calculated by the following equation:
$$\sigma T_s^4=\frac{(1-A)\Omega}{4}+\Delta E$$
where,
$\sigma$= Stefan-Boltzmann Constant
$T_s$= Average Surface ...
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1
vote
1
answer
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How do I find the temperature of the air mass, and how do I use a t-skew chart?
So the first problem I'm stuck on is this one:
An airmass is moving down a mountain from point A to B. At A the temperature is -10 Celsius and the pressure is 890hPa. At point B the pressure is 1010 ...
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Finding out actual dip and dip direction of refractor
We have two traveltive curves for first arrivals (direct and refracted) from a dipping refractor in the forward and reverse directions along a profile line.
my question is:
Is there a logical way (non-...
1
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0
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How to draw a strike and dip on a geologic map?
I know that Strike and dip refer to the orientation or attitude of a geologic feature. The strike line of a bed, fault, or other planar feature, is a line representing the intersection of that feature ...
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2
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1
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When and where is the atmospheric greenhouse effect strongest?
Is the greenhouse effect stronger in the ice covered area or in the equator?
Also is it stronger during winter or summer?
I am thinking it is stronger in the Ice covered area and during winter because ...
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1
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0
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161
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Modification of an air mass
If an air mass that exists in North America starts moving south west or south east what kind of modification will affect it and how would you characterize it in it's final state?
My answer is that it ...
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3
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0
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168
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Optical Thickness of the Atmosphere
Homework question:
Show that the absorption optical thickness of the atmosphere
at pressure $p$ (i.e., between $p$ and the top of the atmosphere) as a function of the mixing ratio
of the ...
- 185
1
vote
0
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38
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Agricultural self sufficiency after yellowstone eruption?
Given a 440 acre farm running roughly 200 acres of Crops and 40-50 head of cattle,in the secondary ash zone within the lake of the ozarks reigon of Missouri, how viable would survival be relying on ...
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5
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2
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Number of tectonic plates
I came across a question asking what's the number of tectonic plates in this illustration:
I don't know on which basis we count the tectonic plates.
And I'm confused because I think they are 5 but ...
- 51
3
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1
answer
517
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Differentiate a rock and mineral
How to differentiate between a rock and a mineral by merely looking at it as a thumb rule?
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0
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what are some limitations for using meteorites as evidence for the Earth's age?
I'm currently doing a question at the moment which is:
Evaluate the usefulness and limitations of evidence provided by meteorites of Earth's age.
I'm having trouble finding some limitations at the ...
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0
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How does one analyze this graph on atmospheric C02 data obtained from the Mauna Loa observatory?
Graph I am analyzing:
What I am trying to figure out from the graph is:
What is the range for CO2 over the record (approximation)
What are the major forcings for the overall trend in this record
...
- 485
5
votes
1
answer
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How to calculate residence time for an element in a reservoir?
The residence time for an element in a reservoir can be calculated by the reservoir size at steady state divided by the inflow or outflow rate. Given the following diagram, I need to calculate the ...
- 485
1
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1
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Easy homework questions about seasons and daytime
The following homework assignment is supposed to be easy, but there seems to be information missing from the questions asked (or at the very least knowledge from OP).
At which width circle does the ...
3
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2
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How do you calculate the elevation at which clouds will form (lifting condensation level)?
I have a parcel of air at 30°C with a dew point temp of 15°C. It goes up and then back down a mountain 4km in height. Assuming the normal and dry adiabatic lapse rates apply, and an ELR=7.5°C/km, ...
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1
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What equation should I use in this isostasy problem?
I have this problem, and I am not sure where to start. The only Airy equation in my text is $r_1= \frac{h_1 \cdot p_u}{p_s - p_u}$. This doesn't seem to apply, or if it does it isn't obvious. Is ...
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4
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How do I find the horizontal pressure level that divides the atmosphere into 2 layers of equal mass?
Surface pressure given is p = 1000 hPa. (the temperature along the atmosphere is constant (T = −10 °C; hydrostatic equilibrium assumed). I tried using the hypsometric equation to find the height of ...
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3
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2
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810
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How to graph gravity as a function of depth, given radius and density?
I need to do this for a planet that has uniform density, and a planet that has two layers. For the first part, I was given that the density was 550 kg/m³, so I made one column in an Excel spreadsheet ...
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0
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356
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Puzzle using relative dating principles
This isn't directly looking at a real life ecological example kind of thing, but it requires knowledge of relative dating, so I thought I would come here.
Here is what was told:
-"Worms" (curved ...
1
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0
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55
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Pyrite oxidation
How much pyrite has to be oxidized to produce a sulfate concentration of 15 mM?
If the solution initially has a pH of 8, roughly what would the pH drop to if there is no buffering of acidity?
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1
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149
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The sun rises up at 7:30 in 25°E, What time will the sun rise up in 15°E?
I've a question about time calculating.
The sun rises up at 7:30 in 25°E, What time will the sun rise up in
15°E?
What I've tried
$$25° - 15° = 10°$$
By the way
$$10° . 4 = 40 \space \text {...
- 1
3
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5
answers
1k
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Where are the oldest igneous rocks found?
I'm trying to catch up on my homework for earth science, but I'm having a difficult time searching for an answer to my question.
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3
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The fertility of the soil
I came across this question in my book, it says:
The fertility of the soil increases when there is a lot of ....... in it.
The choices to fill the space were:
Nitrogen - nodular bacteria - ...
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2
votes
1
answer
131
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Result of deterioration of vegetation
I had this question in my previous exam, it says:
Deterioration of vegetation resulted by overgrazing results in......
1.desert encroachment.
2.change in climate.
I had to choose 1 or 2 and I chose ...
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1
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0
answers
53
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How can the hydrosphere be properly used to reduce the load on the lithosphere [closed]
The earth is made up of 70% hydrosphere and 30% lithosphere.The space of lithosphere is continually used and it seems there is a threat to a balance ecosystem.Describe how the hydrosphere can be make ...
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4
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1
answer
473
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A sedimentary rock with only minerals
In my text book I came across this multiple-choice question
A sedimentary rock consists of only minerals and lacks fossils, it could be classified as:
i) a clastic sedimentary rock
ii) a chemical ...
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6
votes
1
answer
153
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The environments of particular deposits
I came across this question in my text book:
"During a visit to a mountainous area, students noticed a high mountain consists of 3 different parts: The top of the mountain consists of ...
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0
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38
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Residence time for another planet [closed]
This is a question about residence time for another planet with the following information below:
When we arrive on the second habitable planet, we discover that it is also exactly like Earth, except ...
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1
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0
answers
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Categories for supervised classification, wildlife analysis
I am using GIS to undertake a small research on the loss of natural habitat in north England. I will be using Supervised Classification where I train the system on a few examples, e.g.
shallow water
...
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1
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0
answers
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Has there been loss of natural habitat in north England?
Has there been loss of natural habitat in north England or Britain in general over the past years? If there was, what is the loss in percentage? A reference would be highly appreciated
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1
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To find hardness in Mohrs scale [closed]
Except diamondת which mineral is having high hardness in Mohr scale.
A Oxide
B silicate
C carbonate
D phosphate
-3
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1
answer
292
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Where can I find a shallow-water solver in MATLAB?
I do not know how to solve the shallow water equations in the matrix form in MATLAB. I didn't find anything useful on the internet. I have the specific mathematical equations to solve (please see the ...
2
votes
1
answer
102
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Dynamic meteorology - calculating air temperature based off falling air
I'm not sure if this is the correct place to ask this. Basically I have an exercise in dynamic meteorology that is set up like this:
1 kg of dry air is falling with a constant speed of 0.5 cm / s ...
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1
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0
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229
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Do reverse faults tilt the underlying layers of rocks to form an angular unconformity?
I came across this question while studying in my text book: What does the existence of strata containing a reverse fault and above them parallel strata refer to? I thought that referred to an angular ...
2
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2
answers
146
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Making clouds for science project
This is about a group project for our science class and we've decided to do a physical model on clouds.
We could use liquid nitrogen and hot water to demonstrate the formation of the clouds and we ...
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5
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1
answer
203
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Carbon dioxide and ocean acidification based on temperature
For our assignment, we are required to analyse and compare the $\ce{CO2}$ level (in both ocean and air) of two different sites. Theoretically, shouldn't the $\ce{CO2}$ level of a colder region (e.g., ...
Lisa Ban
4
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1
answer
479
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Relative dating of intrusion
I am quite new to geology and have a realtive dating problem which I am a bit unsure of. I know very well the principle of superposition, principle of cross-cutting, etc., but am still a little bit ...
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2
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Take all the CO2 in the atmosphere and put it into a layer on the surface of earth, how thick would the layer be?
I teach a Middle School (year 8) Geometry course and have a student attempting to answer this question. My assumptions:
earth's radius is $3959 \text{ mi}$
earth is a sphere
There is approximately $3 ...
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6
votes
1
answer
147
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Identifying trichroic crystal systems
An unknown mineral shows three distinct pleochroic colours. Explain what observations you need to make in order to decide which crystal system it belongs to.
If it has three pleochroic colours this ...
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0
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101
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Are there any books, websites, etc. that have many practice problems for Skew-T diagrams and the atmospheric sciences in general?
I am asking because my Intro to Atmospheric Science class (lectures, labs, and the book) has not provided any practice examples of Skew-T diagrams, Coriolis force calculations, LCL (liquid ...
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0
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Dating fluvial terraces with $^{10}\rm{Be}$
I've completed part A of the question below.
Dating fluvial terraces with $^{10}\rm{Be}$
One way to determine the age of an alluvial deposit is to collect a series of samples from a range of depths, ...
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3
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What is the shortest path between two points on Earth's surface?
I am a Math student and don't know about longitude and latitude. This question was asked in CSIR-NET Mathematics. Please help me to solve it.
Two points $A$ and $B$ on the surface of the Earth have ...
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1
answer
1k
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Calculating magnetic declination for a non-axial dipole field
I'm trying to answer the following question:
Compute the inclination and declination of the magnetic field that would be observed in Boulder, Colorado (40°N, 105°W) if the Earth’s field ...
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3
votes
1
answer
1k
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The free oxygen (O$_2$) in the atmosphere is largely a result of what process?
Does it come from
a)atmospheric lightning and ozone dissociation.
b)meteorite impacts early in the earth's geological history.
c)Paleozoic volcanic activity.
d)photosynthetic processes.
e)...
3
votes
3
answers
5k
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How do I convert between different east longitude coordinates?
I have two datasets that represent longitude in different ways. The first represents longitude as degrees from east to 180, but then as negative east so that I have a series which looks like:
...
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6
votes
1
answer
1k
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Plotting a mineral stability diagram
I'm trying to figure out how to plot the stability of 4 minerals — $\ce{CaCO3}$, $\ce{CaSO4}$, $\ce{CaMg(CO3)2}$, and $\ce{CaMg3(CO3)4}$ — with axes of $\mathrm{ln}\,a_{\ce{Mg^{+2}}}$ vs $\mathrm{ln}\,...
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1
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Maps and Faults
I'm having trouble determining the type of fault represented on this map.
What type of fault is represented on this map?
What is the fault orientation?
What does this mean?, Do I do this by working ...
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6
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2
answers
2k
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Interpreting a geological map
I have a homework question that I'm stuck on, I have attempted interpreting this map but am not sure if I have to correct interpretation.
What is the youngest/oldest rock in the geological ...
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