How Plants Live How Plants Live and Grow and Grow

Chapter 1Chapter 1

Plant RootsPlant Roots What is the job of plant roots?What is the job of plant roots?

They hold plants in the ground and take water They hold plants in the ground and take water and minerals from the soil and minerals from the soil

A mineral is a natural, NONLIVING, material A mineral is a natural, NONLIVING, material that can be found in soil that can be found in soil

Plant StemsPlant Stems What is the job of a plant stem? (*think of What is the job of a plant stem? (*think of

our backbone)our backbone)

Stems hold up the leaves, flowers and fruit of a Stems hold up the leaves, flowers and fruit of a plantplant

Stems have tiny tubes in them that carry water Stems have tiny tubes in them that carry water and minerals from the roots up to the plantand minerals from the roots up to the plant

Where do stems grow?Where do stems grow?

Plant LeavesPlant Leaves What kind of Plant Leaves have you What kind of Plant Leaves have you

seen? seen?

Plant LeavesPlant Leaves Green Plants use Green Plants use energy from the sunenergy from the sun to make food to make food

(sugar)(sugar) See diagrams on pg. A10-A11See diagrams on pg. A10-A11

Flower PartsFlower Parts

Point to the Petal on pg. A14, What is Point to the Petal on pg. A14, What is a Petal?a Petal?

Where is Pollen formed? Where does Where is Pollen formed? Where does it have to be moved to first?it have to be moved to first?

Pollen must be moved to the Pollen must be moved to the center of the flower BEFORE seeds center of the flower BEFORE seeds can form! can form!

How do seeds form?How do seeds form?

1. Pollen moves to the center of the 1. Pollen moves to the center of the flowerflower

2. Seeds begin to grow2. Seeds begin to grow 3. A fruit forms around the seeds to 3. A fruit forms around the seeds to

protect themprotect them 4. As the fruit grows, the flower 4. As the fruit grows, the flower

petals fall offpetals fall off

Scattering Pollen Scattering Pollen

Who can carry pollen from flower to Who can carry pollen from flower to flower?flower?

BIRDS AND INSECTS!BIRDS AND INSECTS! When bees carry pollen to the stem-like When bees carry pollen to the stem-like

part of the flower it’s called part of the flower it’s called pollinationpollination

How else can pollen be scattered?How else can pollen be scattered? WIND!WIND!

How do Cones form How do Cones form seeds?seeds?

Pollen from cones is scattered by the windPollen from cones is scattered by the wind

This pollen lands on a cone and pollinates This pollen lands on a cone and pollinates it, then seeds form and grow! (Have you it, then seeds form and grow! (Have you seen a pinecone??)seen a pinecone??)

Trees with Cones, like Trees with Cones, like EvergreensEvergreens, keep , keep their leaves all year long! **Pine and Fir their leaves all year long! **Pine and Fir Trees*Trees*

Seed PartsSeed Parts

Seeds come in many shapes, Seeds come in many shapes, colors and sizes!colors and sizes!

All seeds can grow into new All seeds can grow into new plantsplants

Seed PartsSeed Parts

The The seed coatseed coat protects the seeds, like protects the seeds, like a coat we would wear to keep us a coat we would wear to keep us warmwarm

The developing plant gets food from The developing plant gets food from the the seed leafseed leaf

Why do you think seeds need to be Why do you think seeds need to be scattered?scattered?

Scattering SeedsScattering Seeds

Seeds are scattered by……Seeds are scattered by……

1. The wind (what kinds of seeds?)1. The wind (what kinds of seeds?) 2. Water2. Water Animals (which animals do you think Animals (which animals do you think

carry seeds?)carry seeds?)

The Life Cycle of a The Life Cycle of a Flowering PlantFlowering Plant

Every living thing has a life cycle (We Every living thing has a life cycle (We go from infants, to child, teenager and go from infants, to child, teenager and adult)adult)

See diagram on pg. A 22-23See diagram on pg. A 22-23

Seeds grow in the center of the Seeds grow in the center of the flower. After the petals dry up and fall flower. After the petals dry up and fall off, seeds also fall to the ground!off, seeds also fall to the ground!

GerminationGermination

The seed soaks up the water and swells The seed soaks up the water and swells until the seed coat splitsuntil the seed coat splits

A root begins to grow out of the seed A root begins to grow out of the seed down into the soil and the stem begins down into the soil and the stem begins to grow up!to grow up!

This is called This is called germination germination when a tiny when a tiny plant begins to grow and develop! plant begins to grow and develop!

SeedlingSeedling

A Seedling is a young plant that grows out A Seedling is a young plant that grows out of the ground/ point to the picture on pg. of the ground/ point to the picture on pg. A23A23

The Plant is fully grown and will look like The Plant is fully grown and will look like the parent plant (most flowers look the parent plant (most flowers look similar) similar)

What would happen if a seed was planted What would happen if a seed was planted in dry soil? in dry soil?

ConifersConifers

An Evergreen tree that makes cones is An Evergreen tree that makes cones is called a Conifer. called a Conifer.

Conifers keep their leaves all year Conifers keep their leaves all year round!round!

The seeds grow inside the cone and The seeds grow inside the cone and when the scales dry out the seeds fall when the scales dry out the seeds fall out!out!

The Life Cycle of a The Life Cycle of a ConiferConifer

Seeds fall to the ground and some are Seeds fall to the ground and some are germinated or scattered by the windgerminated or scattered by the wind

A Seedling begins to grow and cones A Seedling begins to grow and cones form on the tree (usually in Spring). form on the tree (usually in Spring). Seeds grow inside the POLLINATED Seeds grow inside the POLLINATED cones. cones.

Growth – the tree is fully grown! See Growth – the tree is fully grown! See pg. A24-25pg. A24-25