This printable crossword puzzle on the topic of Rocks & Minerals has 17 clues. Answers range from 7 to 19 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Chronological dating hat describes the timing and relationships of events that have occurred during earths history.
The start of plants and animals to exist.
The start of geology and evolution, phylum appeared which brought fish and other sea animals/creatures.
Age of dinosaurs.
Age of mammals, animals started to dominate the earth.
Burst of life, living organisms started to exist, mostly phyla, made from algae.
Extinction event, 100 meteors struck earth each year, fish evolved, invertebrates dominated the ocean.
Multicellular life started to appear on land, evolved from ocean to land.
Life on land started to grow, the plants covered continents, age of fish.
Sea levels rise, making the land flooded.
Ice ages (Little), swamps of dead plant started to appear which makes most of the world's coal.
Evolving of amniotes into mammals.
Start of dinosaurs, Pangea started to split.
First birds appeared, and earliest lizards, the age of reptiles.
Warm climate, high sea levels mammals, birds, and plants started to appear, mass extinction.
Start of the ice age, rise of mammals.
Ice age ends, environmental changes because of solar radiation, mammals, plants, insects dominated the land.