Enviro Chem Second Part

Question 1

The smell of pizza from the nearby classroom was noticed in the science classroom. The pizza smell made its way into the science room by the process of

Answer 1

Diffusion

Question 2

A potassium permanganate crystal is placed in a Petri dish of water. The rate of “spreading out” is recorded by counting the number of spaces covered on a graph paper grid below the dish over a 3-min time period. The results are recorded in a simple diagram.

Answer 2

Diffusion, temperature

Question 3

Plant nutrients such as potassium, and sulfur enter the root cells through the process of

Answer 3

Active transport

Question 4

The statement that describes the passive uptake of water and nutrients by green plants is

Answer 4

Passive uptake requires no use of engery

Question 5

Hydrolysis is a process that occurs during digestion. The word hydrolysis is derived from the words hydro and lysis

What do these words mean?

Answer 5

Hydro means water

Lysis means break down

Question 6

A large starch molecule is hydrolyezed into maltose amd ends up in a simple usable form called

Answer 6

Glocose

Question 7

The sandy surface that a cactus lives on is referred to as its

Answer 7

Substrate

Question 8

The concentration of a chemical X from an industrial waste pipe is 8 ppm

When compared with mg/L 8 ppm is

Answer 8

Equal to 8 mg/L

Question 9

Five parts vinegar is mixed w 995 parts water

The concentration of the vinegar-water solution is equal to

Answer 9

5000ppm

Question 10

Phosphorus and nitrogen rich fertilizers leaching into water system from nearby farms can have a long term effect on the population of pond plants because

Answer 10

The chemicals cause the ponds oxygen to be depleted due to excessive plant decay

Question 11

Sarin a toxic nerve gas becomes a serious problem at a dose of 24 mg/kg. The toxicity is measured using the symbol

Answer 11

LD50

Question 12

Plant decay by bacteria consumes oxygen. It is the most probable that the greatest decay of dead plants occurred at a site ………… downstream from the treatment

Answer 12

15-20km

Question 13

Acid shock occurs when high concentrations of acidic water affect the lake organisms. What season of the year does this usually occur

Answer 13

Spring

Question 14

Calculate Th e concentration of a solution in ppm when 0.0006 ml of solute is present in 100 ml of solution

Answer 14

6.0 ppm

Question 15

I’m science class u learned that air is actually a mixture of several different gases. The two main gases that make up our air are

Answer 15

Nitrogen and oxygen

Question 16

There are several different methods that can be used to determine air quality.

Which would be most useful

Answer 16

Measuring the levels of pollutants in the air

Question 17

Carbon monoxide is a deadly gas that reduces the amount of oxygen carried by blood. The correct chemical formula for carbon monoxide is

Answer 17

CO

Question 18

Ozone is a gas that is helpful when it is located high up in earth’s atmosphere but acts as a harmful pollutant at ground level. The chemical formula for ozone gas is

Answer 18

O3

Question 19

Three main air pollutants found in large urban areas include nitrogen oxides carbon monoxide and ground level ozone. The main cause of these pollutants in large urban areas is

Answer 19

The combustion of fuel in gasoline powered vehicles