Vocabulary Review Worksheet: Biological Levels of Organization
1. Match the term with the correct description. Write the letter of your choice in the blank
to the left of the term.
atom A Atoms that are chemically bonded
together
cell B A body part made of tissues that
together perform a similar function
organ C All of the populations of living
things in an area
population D The smallest unit of an element;
made of protons, neutrons and
electrons
Organ system E The basic organizational unit of all
living things
biome F Organs that work together for a
common purpose
molecule G A well defined structure within a
cell that performs a specific function
tissue H A group of interbreeding organisms
living in the same area
Organism I An individual living thing capable
of reproduction
Cellular organelle J A grouping of similar cells with a
specific function
biosphere K A community and all of the physical
characteristics of its environment;
all of the living and nonliving things
in an area
community L All of the ecosystems with similar
climates
ecosystem M All of the living things present on,
above or in the earth
2. Complete the puzzle on the back of this sheet using the terms you studied about
biological levels of organization.
Levels of Organization
Unscramble each of the clue words.
Copy the letters in the numbered cells to other cells with the same number.
