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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. Copyright © Houghton Mifflin Harcourt Publishing Company 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. Copyright © Houghton Mifflin Harcourt Publishing Company 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