LOOKING AT PLANTS AND ANIMALS LIFE SCIENCE Third Grade

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

FEATURES OF LIVING THINGS Grow and change Reproduce

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

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

Basic Needs Minerals Sunlight Water Air leaves stems ///////////////////// roots

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.

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.

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.

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

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

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.