Science - Topic 01: Plant Parts - roots and stems
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Transcript of Science - Topic 01: Plant Parts - roots and stems
Topic 1
Roots and Stems
Science
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
Roots
The different parts of a plant do different jobs.
Plants and trees have roots. Roots hold the plant in the soil. They anchor (keep in one place) the plant.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
Topic 1
Roots
Roots take water from the soil for the plant. The plant needs more water as it grows, so more roots are produced.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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Roots
Roots usually keep trees standing when the wind blows, but they may not be able to withstand a storm.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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Roots
tap root fibrous root storage root
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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storage root
Stems
Plants have stems.The stem grows up from the
ground. It supports the leaves so they can catch sunlight.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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stem
Stems
The stem carries water from the roots to the leaves and flowers.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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Stems
Water travels through a plant inside hollow tubes.
In the stem these are called xylem and phloem.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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Stems
In leaves they are called veins.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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Stems
A tree’s stem is called its trunk. It is made from wood and has great strength.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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Stems
Trees grow slowly all their lives. The rings in a tree trunk show how many years it grew for.
This tree was about 70 years old.
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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Roots and Stems
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
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supportsanchor
waterveins
Roots and Stems
SAC – P4/SciencePB/Wendy Wallace Zerafa/Oct2013
Topic 1
THE END