chen unit test

Question 1

how to tell if a substance is organic or inorganic

Answer 1

if it molds or has carbon it’s organic

Question 2

role of carbohydrates

Answer 2

energy source for metabolism

Question 3

lipids role

Answer 3

storage of unused chemical energy

Question 4

proteins role

Answer 4

Structural molecule for body that helps chemical reactions

Question 5

Difference between trace elements and macronutrients

Answer 5

trace element- amount of minerals needed per day
macronutrient - carbs, lipids, proteins

Question 6

what are the ingredients in fertilizer?

Answer 6

nitrogen, phosphorus, potassium

Question 7

What is biomagnification?

Answer 7

Toxicity concentration increases as it moves at the food chain.

Question 8

how do incects become resistant to pesticides?

Answer 8

overtime insects will become used to the pesticides and adapt rothem and it won’t harm them anymore

Question 9

What are acids like

Answer 9

red, sour, tart

Question 10

what are bases like?

Answer 10

blue, bitter, slippery

Question 11

what happens to the acidity of a solution as a pH value decreases

Answer 11

When pH value decreases, the substance becomes more acidic

Question 12

Equation for neutralization

Answer 12

acid+base=neutral (7)

Question 13

how do you neutralize an acid spill and base spill

Answer 13

pour acid on base and base on acid

Question 14

What is acid rain?

Answer 14

Pollution that goes into the air and condenses into clouds to make toxic rain

Question 15

what is acid rain made of

Answer 15

Carbon, nitrogen, Sulfer (burning materials)

Question 16

Effects of acid rain

Answer 16

Destroys, lakes and streams, reduces production of crops, decay on buildings/statues

Question 17

how many millilitres of toxin must be added to 1,000,000 mL of water to produce a 9 PPM solution

Answer 17

9ml

Question 18

What is toxicity?

Answer 18

Ability of a chemical to cause harm to an organism

Question 19

What is LD50?

Answer 19

lethal dose 50
dose of a chemical that will kill 50% of the population it’s applied to

Question 20

what is the relationship between temperature in oxygen concentrations

Answer 20

Cold Water water holds more dissolved oxygen

Question 21

What are bio indicators?

Answer 21

Organisms that indicate the health of environment

Question 22

Relationship between pollution levels, and biodiversity

Answer 22

High pollution levels equals biodiversity decrease

Question 23

what is the relationship between oxygen concentration, and biodiversity

Answer 23

High oxygen concentration equals more biodiversity

Question 24

what is the relationship between oxygen concentration in the number and types of ivertebrates found in a river

Answer 24

higher oxygen equals more invertebrates

Question 25

difference between biodegradable or nonbiodegradable

Answer 25

Biodegradable can break down in an environment and non biodegradable takestime/doesn’t

Question 26

what environmental conditions are required for the optimal decomposition of biodegradable materials

Answer 26

Moisture,heat

Question 27

which nutrients are added to lake or pond when it receives agricultural run-off

Answer 27

phosphates and nitrates

Question 28

what is the result of phosphates and nutrients entering water

Answer 28

algal blooms and poor water quality

Question 29

completion:

Answer 29

increased nutrients=increase algea=increase bacteria=decrease O2=decrease trout

Question 30

four r’s

Answer 30

Reduce, recycle, reuse, rethink

Question 31

characteristics of a well constructed sanitary landfill

Answer 31

Gravel, Sand, clay, impermeable liner

Question 32

why should we not incinerate our waste

Answer 32

The chemicals in pollute the air from burning

Question 33

what would u find in a river with low biodiversity

Answer 33

High acidity, high nitrate levels, phosphate levels, low oxygen levels and high pollution

Question 34

chronic toxicity

Answer 34

Happens after multiple exposures to the chemical

Question 35

acute toxicity

Answer 35

acute toxicity Happens after only one exposure to the chemical

Question 36

Persistent pollutant

Answer 36

Does not break down

Question 37

Nonpersistent pollutant

Answer 37

Breaks down

Question 38

Point source

Answer 38

Clear were the pollution came from

Question 39

non point source

Answer 39

Can’t really be traced back with the pollution came from (spread wide)