Shared Flashcard Set

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Quiz #1
First quiz
21
Science
8th Grade
10/17/2007

Additional Science Flashcards

 


 

Cards

Term
Control
Definition
something you can compare your tests to from a faraway place
Term

pH

Definition

Potential hydrogen

Term
Bioindicator
Definition
animals/plants that is sensitive to changes in the environment. They show scientists if the environment is healthy.
Term
Base
Definition
A substance with a pH greater than 7.     
Term
Secchi Disk
Definition
disk that we used to see if the water was clear or not
Term
Chlorine
Definition
chemical used to kill germs: a gaseous poisonous corrosive greenish yellow element of the halogen group that is highly reactive and is a product of the electrolysis of sodium chloride. Use: water purification, disinfectant.
Term
Food Chain
Definition

 a sequence of animals that get energy from each other, each one eating the one before it

Term
Turbidity Tube
Definition
tool that shows you the visibility of the water.
Term
Daphnia
Definition
A small type of insect that lives in the water, they are bioindicators
Term
Buffering
Definition
When acid rain gets into water, and the surrounding rocks are lime, the acidic water/rain is buffered/neutralized.  If the rock is granite, then the water does not become neutralized.
Term
Acid
Definition
A substance that has a pH less than 7
Term
H+ Ions
Definition

positively charged hydrogen ions which causes liquids to be acidic.

Term
OH- Ions
Definition
 negatively charged hydrogen ions that cause it to be alkaline/non acidic
Term
Enviornment
Definition
Any place that includes living things: plants, animals, fungi, bacteria, or protists AND non-living things: minerals, air, water, land
Term
Food Web
Definition
many feeding relationships that are all interconnected in an ecosystem.
Term
Trophic Level
Definition

Each step of energy through the food chain or food web

Term
Producer
Definition
a photosynthetic organism.  The only organism on earth that can take energy directly from the sun.
Term
Detritivores
Definition
organisms that eat dead things. Bacteria, vultures, fungi, termites, blowflies, maggots. 
Term
Biological test
Definition

A test that shows what is dying off

Term
Chemical test
Definition

a test that shows what’s killing the dying organisms

Term

Sediment Run-off

Definition
it rains and sediment is carried by water to a stream or river
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