Investigating Plant Life Cycles

Investigating Plant Life Cycles — page 1 — Chapter 1 what is a life cycle A green sprout pushes up through the soil A new life cycle has begun A plant's life cycle tells the story of its growth The life cycle starts when the plant sprouts It ends when the plant starts to reproduce Then a new cycle begins This is a young flowering plant What are the three other types of plants

Investigating Plant Life Cycles — page 2 — There are four main types of plants They are flowering plants cone bearing plants ferns and mosses Each plant group has a different life cycle PINE TREES ARE PART OF THE CONE BEARING PLANT GROUP

Investigating Plant Life Cycles — page 3 — Life Spans A plant's life cycle is not the same as its life span A life span tells how long a plant may live Some plants live only a few weeks Others grow very old A bristlecone pine can live for five thousand years Not all plants die of old age Disease insects drought and fire kill some Others die because of humans Some plants of each species must live long enough to reproduce Otherwise they will become extinct This giant sequoia is known as General Sherman It is more than two thousand years old

Investigating Plant Life Cycles — page 4 — PLANTS DIE WHEN HUMANS HARVEST THEM FOR FOOD OR WOOD THEY ALSO DIE WHEN HUMANS REMOVE THEM TO MAKE SPACE FOR FARMS OR BUILDINGS

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