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Presentation on theme: "Calcium"— Presentation transcript:
Slide1
Calcium & Magnesium
Demi
Sabados & Alec Ayala Marshall
Slide2
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
Slide3
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
Slide4
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
Slide5
Fun Facts & Study Tool
Calcium is the 5
th
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
M-Mineral
A-Abundant I-Industrial
emmisions
L-Life U-Use
Slide6
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)
Slide7
Marble
soil
Plant
A
tmosphere
Human and animal use
Slide8
RSPDA
Rock
Soil
Plant
Decomposition
Air
Slide9
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
Slide10
Fun facts
Magnesium is the central element of chlorophyll
Scientists can tell if a plant has a magnesium deficiency by plants color
