Science Chapter 9

Front 1

risk

Back 1

how likely it is to cause harm

Front 2

social hazzards

Back 2

is result from lifestyle choices a person makes while other hazards cannot be controlled

Front 3

list a few examples of social hazards

Back 3

smoking, eating allot of junk foods.

Front 4

epidemiology

Back 4

the study of disease in human population

Front 5

emerging disease

Back 5

is a disease that is appeared in the human population for the first time. or that has existed for a wile but is increasing rapidly or spreading around the world.

Front 6

how easy is it to cure an emerging disease?

Back 6

not easy because humans haunt developed resistance to the disease there for vaccines have not been made

Front 7

what douse a substances toxicity depend on?

Back 7

what the substance is and how much of the substance is needed to cause harm.

Front 8

where can you find chemical hazards?

Back 8

you may find them in your kitchen or in your bathroom for cleaning.

Front 9

earthquake

Back 9

as plates scrapes against each other sometimes they get stuck and the stress builds up. when the plates finally move energy is released this causes the earth to shake

Front 10

biomagnification

Back 10

when concentrations of toxic substances are magnified as animals eat other animals and animals eat them.

Front 11

tornado

Back 11

is a type of wind storm in which a funnel of of rotating air drops down from a storm cloud and touches earths surface.

Front 12

volcano

Back 12

an opening in earths crust through which lava ash and gasses are ejected.

Front 13

physical hazards

Back 13

physical processes that impose health hazards for example earthquakes, tornados, hurricanes etc.

Front 14

allergen

Back 14

something that your amune system over facts to
like allergic to cats/ typos of grass etc

Front 15

genetic factors

Back 15

both a persons genes and the environment he or she lives in can effect the individuals chances of suffering from the disease

Front 16

what are the three main ways infectious diseases are spread (short answer)?

Back 16

infectious diseases three main ways they can be spread is by humans water and food and other organisms.
humans - touching biting sexual intercourse contact with bodily fluids can all spread diseases.
water and food- spread when people consume contaminated after and food.
other organisms- when animals carry a disease and pass it on to human to human. e.g. misquotes echage bloods with humans.

Front 17

figure 21
what is the diagram showing?

Back 17

when ddt becomes more concentrated in the tissues f organisms at each step of the food chain.

Front 18

figure 21
which direction douse the ddt move?

Back 18

up

Front 19

figure 21
what happens to the ddt as it moves up the diagram?

Back 19

it becomes more concentrated.

Front 20

figure 21
how are the fish eating birds effected by ddt?

Back 20

it effected the ability for them to reproduce.

Front 21

figure 21
how might the produces levels be affected?

Back 21

not very effected/ not as concentrated.

Front 22

define what emerging disease are and explain why it is so important to monitor and control them?

Back 22

emerging diseases are diseases that is appeared in the human population for the first time. or that has existed for a wile but is increasing rapidly or spreading around the world. t is important to control them to assure that there is not a bad outbreak due to the disease being a new disease and not having vaccines to cure them.

Front 23

what type of hazards effect the endocrine system?

Back 23

chemical hazards.
eg. grow disorders.