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What are the two roles that potassium does to plants?
What is Potassium is associated with the movement of water, nutrients and carbohydrates in plant tissue
why are heavy metals considered pollutants
Because they have a high density of 5 g/cm 3
what is one example of substances that contaminate groundwater?
heavy metals, organic substances and minerals.
BIOMAGNIFICATION
IS THE INCREASE IN CONCENTRATION OF A CHEMICAL OR ELEMENT AS IT MOVES UP THE FOOD CHAIN.
FERTILIZER
IS A SUBSTANCE THAT ENRICHES THE SOIL SO THAT PLANTS CAN GROW
what could you do at home to help minimise the environmental damage caused by pollution from gas and oil processing?
2 examples are avoid buying plastics and quit bottled water for good.
You have an air sample of 0.02 ml of carbon dioxide in 1000 ml of air. What is the concentration of the carbon dioxide in parts per million?
0.02 x 1,000,000 divide by 1000= 20
if you don't know this. it is a big part of this unit
what is one issue when it comes to transport of hydrocarbons?
coats grains, fills pores and creates high concentration
PORES
ARE TINY LITTLE SPACES BETWEEN SOIL GRAINS
SOUR GAS
is natural gas or any other gas containing significant amounts of hydrogen sulfide
what chemicals are in fertilizer bag?
nitrogen(N) - phosphorus(P) - potassium(K)).
What are 6 examples of heavy metals
what are: copper, lead, zinc, mercury, cadmium and nickel
why should aerosol be emptied completely before throwing it out?
Well, aerosol cans can contain substances, including the product itself and the gaseous propellant (the stuff that makes the product spray out of the can), which can create dangerous conditions when collected in the trash
PERMEABLE
IS ONE WITH INTERCONNECTED PORES
NEUTRAL
IS NOT A BASE OR ACID
why do some people want farmers to lower the amount of pesticides on farms
runoff and due to their own health
Global warming may lead to what
what is climate change
what are three factors that affect biodegradation
A number of factors determine the rate at which this degradation of organic compounds occurs. Factors include light, water, oxygen and temperature.
ELEMENTS
ARE PURE SUBSTANCES THAT CANNOT BE BROKEN DOWN INTO OTHER SUBSTANCES
LIPIDS
ARE COMPOUNDS COMPOSED OF MANY CARBON, HYDROGEN AND OXYGEN ATOMS.
What is a sanitary landfill site
Sanitary landfills are sites where waste is isolated from the environment
what does LD50 stand for
what is Lethal Dose and 50% on test animals who died
why is it important chemicals used in the classroom should be labelled
If the product is expected to be hazardous, list potential hazards (e.g., may be explosive, toxic).
NITROGEN FIXATION
IS THE PROCESS OF CHANGING FREE NITROGEN SO THAT THE NITROGEN ATOMS CAN COMBINE WITH OTHER ELEMENTS TO FORM COMPOUNDS THAT ORGANISMS CAN USE.
DILUTION
REDUCES THE CONCENTRATION OF A POLLUTANT BY MIXING THE POLLUTANT WITH LARGE AMOUNT OF AIR OR WATER.