LD 50
What is a simple definition of LD-50?
The median lethal dose of something
What is ocean acidification simply?
Ongoing decrease in the pH of Earth's oceans.
What is eutrophication?
When a body of water gets too many nutrients which causes algae to grow more than necessary
What is a landfill?
Place where trash and waste go
what is a pollutant?
a harmful substance to the ecosystem
Why is LD 50 important for toxicology?
It...
--measures relative toxicity
How does the absorbtion of carbon dioxide decrease pH?
when it dissolves in seawater, it forms carbonic acid and the hydrogen ions increase which lowers the pH and makes the water more acidic.
Where do the extra nutrients come from?
Fertilizers, sewage, runoff, etc.
Why are they used
To get rid of garbage
where do they come from?
cars, factories, etc.
Is a lower or higher LD 50 better?
Lower ; indicates higher toxicity
how does an increase in CO2 affect marine life/chem?
Leads to a lower pH and reduced carbonate ions which are essential for marine organisms.
What are negative implications of the extra algae?
When algae die they rot and take oxygen in the water which can kill fish that do need that oxygen, disrupting the marine ecosystem.
Why is methane a problem?
It is a greenhouse gas that traps heat in the atmosphere?
water, land, air
LD 50 v LC 50?
what is the relationship between Ocean acidification and marine food chain?
Many small organisms are the base of this web, and they rely on calcium carbonate so when their population declines, it disrupts the rest of the food chain upwards.
What does eutrophication do to water quality?
Makes it green and cloudy, smell bad, unhealthy
How can they be made better?
Lining them with clay to prevent leakage
how can we reduce it?
using more public transpo(less individual cars), reducing plastic use, using electric cars
Does LD50 indicate the lowest dose that can be fatal?
NO!!!!! Misconception
How does ocean acidification affect global fisheries?
Could lead to a decline in fish populations and shellfish industries Which threatens their futures.
Can it be reduced?
Yes, use less fertilizer and be more careful with farm runoff
Can we reduce the need for landfills
yes! reduce reuse recycle
why is it important to reduce pollution?
because pollution causes respiratory issues, and is bad for the health of people and animals