LOOKING AT PLANTS AND ANIMALS

1. LOOKING AT PLANTS AND ANIMALS LIFE SCIENCE Third Grade

2. Vocabulary Preview organism,A6 leaf,A18 reproduction,A7 energy,A18 environment,A8 oxygen,A19 respond,A8 life cycle,A26 cell,A10 embryo,A26 mineral,A16 heredity,A27 root,A17 flowering plant,A28 stem,A17 conifer,A28

3. Grow and change Reproduce FEATURES OF LIVING THINGS

4. Smaller Parts of Living Things • Plant Cells • Cell membrane • Nucleus • Cytoplasm • Cell wall • chloroplast • Animal Cells • Nucleus • Cytoplasm • Cell membrane

5. The Needs of Plants • Review • Vocabulary Mineral, A16 • Root,A17 • Stem,A17 • Leaf,A18 • Energy,A18 • Oxygen,A19

6. Basic Needs • Minerals • Sunlight • Water • Air leaves stems ///////////////////// roots

7. Why Does A Plant Need Leaves? • Leaves are the main food-making part of the plant. • Leaves take in sunlight. • Leaves are green because of chlorophyll. • Chlorophyll traps the energy in sunlight for the plant. • Leaves also help the plant get the air it needs. • It uses carbon dioxide from air. • The plant uses the Sun’s energy to combine carbon dioxide • and water to make food. • 8. Plants use food to stay alive and give off oxygen.

8. How Do Plants Respond To Their Environment? One way plants respond is by growing toward the sunlight. Trees respond to cooler weather when their leaves turn color.

9. Why It Matters We depend on plants for food. We eat the roots, Stems, and leaves of plants. The cereals we eat Are made from plants. We eat animals that eat Plants. However, people need plants for more Than food. We also breathe the oxygen that plant Leaves make.

10. The Life Cycle of a Plant Vocabulary Preview • Life cycle,A26 • Embryo,A26 • Heredity,A27 • Flowering plant,A28 • Conifer,A28

11. How Does a Plant’s Life Begin? A seed begins a plant’s life cycle. A plant begins life, grows, develops, reproduces, and dies.

12. Think On a cold day, you might see icicles that have grown from the roof of a building. Does this mean icicles are living? Explain.