Question

______ are NOT a source of arsenic in the environment. *
Pesticides
Rocks that naturally contain the element
Weed killers
Old water pipes

What policy change was based on the results of the students’ water-testing project? *
The U.S. Environmental Protection Agency established a national limit for arsenic in drinking water.
The national limit for arsenic in drinking water was lowered to 5 parts per billion (ppb).
The national limit for arsenic in drinking water was increased to 10 ppb.
New Hampshire’s limit for arsenic in drinking water was lowered from 10 ppb to 5 ppb.

Damage to the body’s _______ system can affect brain development, learning, and memory. *
cardiovascular
muscular
endocrine
nervous
4. The element arsenic is a ______. *
metalloid
metal
nonmetal
noble gas
5. Explain how the characteristics of arsenic can make it difficult to know whether a well is contaminated. *

Answer 1

Answer:

A

C

D

A

Explanation:

Answer 2

______ are NOT a source of arsenic in the environment.

• A. Pesticides

The policy change which was based on the results of the students’ water-testing project is:

• C. The national limit for arsenic in drinking water was increased to 10 ppb.

Damage to the body’s _______ system can affect brain development, learning, and memory. *

• D. Nervous

The element arsenic is a ______. *

• A.Metalloid

Pesticides are those chemicals which are used particularly in killing pests such as harmful insects which cause a nuisance to the environment.

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