Calcium & Magnesium
Demi Sabados & Alec Ayala Marshall
Calcium Steps
Step 1: Weathering away of rocks that contain
calcium carbonates/ silicates
Step 2: Calcium flows into the ocean, and stays there
for one million years
Step 3: Eventually returns to the land due to
precipitation
Human Dependencies
Humans often use calcium as a natural tool to
increase soil fertility.
Calcium is also vital for humans when it comes to
strengthening their bones. i.e. (Milk)
Calcium is a mineral necessary for life
Human Affects
Industrial emissions and land use have changed chemical
weathering rates and leached calcium ions out of soils,
aggravating plant and microbial community structures.
The increased acidity of the ocean waters associated with
raising atmospheric concentrations of CO2 has decreased
the saturation state of surface water with respect to
calcite minerals, causing difficulty for calcitic organisms to
produce shells and skeletons.
Pollution
Overfishing
Fun Facts & Study Tool
Calcium is the 5th most abundant element in Earth’s
crust, present at a level of about 3% in the oceans and
soil.
The element name “calcium” comes from the Latin
word “calcis” meaning “lime”
C-Crucial
C-Calcis
A-Abundant I-Industrial emmisions
L-Life
U-Use
M-Mineral
Magnesium Cycle
Found in high concentrations in limestone and
marble
As rock particles weather over time, magnesium
particles are slowly released into the soil
Plants take in nutrients from soil, including
magnesium
When plants decompose magnesium particles are
released into the atmosphere (not in a gas state)
Atmosphere
Plant
Human and
animal use
soil
Marble
RSPDA
Rock
Soil
Plant
Decomposition
Air
Magnesium and human
impact and dependence
We, as well as plants and animals need magnesium to
function.
Humans impact mg cycle through pollution
Example: Acid Rain depletes amount of mg in soil
Soil now cannot produce healthy plants
Causes magnesium deficiencies
Fun facts
Magnesium is the central element of chlorophyll
Scientists can tell if a plant has a magnesium deficiency
by plants color
Mg is the basis of early life on earth
Alcohol abuse can lead to mg deficiency
Sources
https://prezi.com/ndl3mx0vtxtj/the-calcium-cycle/
http://chemistry.about.com/od/elementfacts/a/10-calciumfacts.htm
http://www.exatest.com/minerals.htm
https://prezi.com/6ped_sheurn_/magnesium-cycle/
http://www.webmd.com/vitaminssupplements/ingredientmono-998magnesium.aspx?activeingredientid=998&activeingredien
tname=magnesium
http://www.ancient-minerals.com/magnesiumbenefits/what-is-function/