Scientific Method/Variables
How many variables should a scientist test at one time in an experiment?
1
Define what the word part 'bio' means
bio means life
An organism that makes its own food
autotroph/producer
What does the arrow represent in food chains/webs?
Energy
What is the chemical formula for water?
H20 (Two hydrogen, one oxygen)
Items in an experiment that stay the same are called
controls or constant variables
What does the word part "a" mean?
A means "not" as in "abiotic" (not alive)
Term for organisms that feed on producers
Primary consumers
How much energy is transferred from one trophic level to the next?
10%
What is the smallest unit of matter called?
An ATOM!
A statement in "if, then" format is called a...
hypothesis
What word part means "the study of"
-ology as in "Biology"
Term for consumers that feed on primary consumers
Secondary consumers
Fungi (mushrooms) are considered _________
Decomposers
What is a molecule?
When two or more atoms combine together.
Define what a dependent variable (DV) is.
A dependent variable is what is measured or observed. It changes based on the independent variable. It DEPENDS on the independent variable.
Explain what quantitative means. (ex: the students collected quantitative data during the seed lab)
What is the trophic level above secondary consumers called?
Tertiary consumers (remember tertiary means THREE)
Explain what a trophic level is.
A trophic level is the position an organism occupies in a food chain, representing its feeding and energy relationship to other organisms
Name the three subatomic particles and their charges!
Proton- positive charge
Neutron- no charge, neutral
Election- negative charge
Identify the IV and DV: A student wants to know if using warm water or cold water makes sugar dissolve faster.
IV: What is changed on purpose- the temperature of water
DV: what is measured/observed- how long it takes for the sugar to dissolve
Explain the difference between quantitative data and qualitative data.
Variables can be measured in two ways
Qualitative: describes a quality (ex: color, texture, species)
Quantitative: with numbers (ex: temperature, length, weight)
Define what an abiotic factor is and give at least two examples.
Abiotic factors are non-living--rocks, water, sun, minerals, soil
Name all trophic levels in order on a food web/food chain!
Trophic levels in order from smallest to largest are producers, primary consumers, secondary consumers, and tertiary consumers.
Fill in the blanks.... In chemistry, opposite charges _____ and similar charges _____.
In chemistry, opposite charges ATTRACT and similar charges REPEL.