Experimental Design and Levels of Organization (2025)

All the alligators in the same area are an example of a(n) _______________.

• organism

• community

• population

• group

multiple populations

of different species

living together

• community

• population

• ecosystem

• biodiversity

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-5

Tissue

• The basic unit of life

• Group of cells that perform a job

• Two or more tissues working together to perform a function

• A group of organs working together to perform a function

• Living things performing life processes by itself

Tags

NGSS.MS-LS1-3

Multiple organisms of the same species describes a

• organism
• population
• community
• ecosystem

Reorder the following from least to greatest (from left to right).

• community

• biome

• ecosystem

• population

• organism

Which of the following is an example of a community?

• All the tiger sharks in the ocean.

• All the oak trees in a forest.

• All the cows on a farm. 

• The plants and animals in the same area.

community PLUS all

of the abiotic factors

in the environment

• organism

• population

• community

• ecosystem

Tags

NGSS.MS-LS2-3

One tank of goldfish is fed the normal amount of food once a day. A second tank is fed twice a day. A third tank is fed three times a day. The fish’s weight is recorded daily. What is the...

• the fish with the normal amount of food.

• independent variable?

• type of fish

• control group?

• the weight of the fish

• one controlled/constant variable?

• frequency of feeding.

• dependent variable?

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

In an experiment to see which brand of gel pens ink writes the longest, The brand of pens is (a)   while how long each brand lasts is the ​ (b)   .

• independent variable
• dependent variable

In an experiment, the variable that we change on purpose (manipulate) is called the

• Control variable

• Dependent variable

• Constant variable

• Independent variable