Save Status:
or to save your progress. The page will not refresh.
Controls:
SPACEBAR SWITCHES TYPING DIRECTION
Answer Key:
Edit a Copy:
Make Your Own:
Crossword Word Search Worksheet
Rate This Puzzle:
Log in or sign up to rate this puzzle.

science

Across
He 2
fossils that are used to define and identify geologic time periods
a fossil in which minerals replace all or part of an organism
formed when an object is placed into soft mud and is removed by decomposition or physical sources
The movement of deep, cold, and nutrient-rich water to the surface
a plant , animal or other organism is perfectly preserved for many of years
Microscopic organisms that float and drift in the ocean waters are called
A fossil formed when most of the materials making up an organism break down, leaving only carbon
rock that forms when melted rock cools and hardens
The breaking down of rocks and other materials on the Earth's surface.
A thin layer of gases surrounding Earth
a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
Down
Preserved remains of once-living organisms
H1
A type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions.
photosynthetic algae found near the surface of the ocean
Be 4
WATER
Li 3
Molten rock beneath the earth's surface