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Unit 6 Lesson 1 What Are Some Plant Structures?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 What Are Some Plant Structures?
Florida Benchmarks
• SC.3.N.3.2 Recognize that scientists use models
to help understand and explain how things work.
• SC.3.N.3.3 Recognize that all models are
approximations of natural phenomena; as such,
they do not perfectly account for all observations.
• SC.3.L.14.1 Describe structures in plants and
their roles in food production, support, water and
nutrient transport, and reproduction.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 What Are Some Plant Structures?
Get to the Bottom of It
• Plants are made up of different parts. Each part
has a function that helps the plant survive.
• Roots are plant parts that are underground. They
come in all sizes and shapes.
• Some roots are long and thick. Others are small
and reach out in many directions.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 What Are Some Plant Structures?
Get to the Bottom of It
• Roots hold plants to the ground. They also absorb
water and nutrients from the ground.
• Nutrients are materials that living things such as
plants need to grow.
• Water and nutrients move from the roots to other
parts of the plant.
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Unit 6 Lesson 1 What Are Some Plant Structures?
Reach for the Sky
• Water and nutrients move from the roots to the
stem. The stem carries water and nutrients to
other parts of the plant.
• The stem holds up the parts of the plant that are
above ground.
• Some stems are thick and woody. Others are thin
and soft.
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Unit 6 Lesson 1 What Are Some Plant Structures?
Plant Food!
• Plants make their own food. The process takes
place in the leaves.
• Leaves come in many different shapes and sizes.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 What Are Some Plant Structures?
Plant Food!
• Leaves use water, air, and light energy from the
sun to make food.
• Stems transport the food from the leaves to other
parts of the plant.
• The plant uses most of the food to grow and
change. Some of the food is stored.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 What Are Some Plant Structures?
The Cycle of Life
• When living things reproduce, they make new
living things like themselves.
• Plants use flowers and cones to reproduce.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 What Are Some Plant Structures?
The Cycle of Life
• In plants with flowers, the flower grows into fruit.
The fruit contains seeds that grow into new
plants.
• In plants with cones, the cones release seeds that
grow into new plants.
• Both kinds of seeds use sunlight, soil, water, and
air to grow into adult plants.
Copyright © Houghton Mifflin Harcourt Publishing Company