All about plants (life sciences)

Plants need water, air, and sunlight to grow.. Nutrients help plants grow.. Roots carry water and nutrients to the stem.. Plants need the right amount of sunlight and water to grow and s

Genre Comprehension Skill Text Features Science Content

Nonfi ction Main Idea and Details • Captions

• Labels

• Glossary

Plants

Scott Foresman Science 2.5

Standards Preview

Standard Set 2 Life Sciences

2 Plants and animals have

predictable life cycles As a basis for

understanding this concept:

2.e Students know light, gravity,

touch, or environmental stress can

affect the germination, growth, and

development of plants.

2.f Students know flowers and fruits

are associated with reproduction in plants.

ISBN 0-328-23507-5

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Life Sciences

by Mary Beth Spann

germinate

pollen

seed coat

seedling

stem

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ISBN: 0-328-23507-5

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by Mary Beth Spann

What do plants

need to grow?

Plants need water, air, and sunlight

to grow

They need nutrients from the soil

Nutrients help plants grow

These plants are growing well.

3

Plant Parts

A plant has four main parts

It has roots, a stem, leaves, and fl owers

A plant’s roots grow down into the soil

They hold the plant in place

Stems and leaves seek light as they grow.

Roots take in water from the soil

Roots also take in nutrients from the soil

Roots carry water and nutrients to the stem

The stem holds up the plant.

It carries water and nutrients to the

leaves

Roots grow down

Stems, leaves, and

fl owers grow up.

5

Green leaves make food for the plant

They make food using air, water, and energy from light

Flowers make seeds

Seeds can grow into new plants

This plant’s fl owers are purple.

How can the

environment

change the way

plants grow?

A change to the environment can

change how a plant grows

Plants need the right amount of sunlight

and water to grow and stay healthy

Plants also need the right temperatures

Without enough water,

plants can die.

7

Other Changes in Plants

Wind can change how plants grow

Vines grow along the ground

They change how they grow when they touch another plant

Plants get nutrients from the soil

Some soil lacks enough nutrients

This can cause plants to grow poorly

Some vines grow around other plants

How do fl owers,

seeds, and fruit

help plants grow?

A fl ower’s outside part is the petal

The petal’s powder is pollen.

Pollen helps seeds grow inside fl owers

Fruit grows around the seeds

It protects the seeds

Seeds make new plants

Oranges and apples grow seeds

petal pollen

9

The hard outside cover of a seed is

called a seed coat.

Inside each seed is a tiny plant

Food is stored around the new plant

The plant uses the stored food as it grows

Use a magnifying glass to look

inside a fl ower

The Life Cycle of a Peach Tree

A peach seed is planted

If it gets enough water and air, it can

germinate, or begin to grow

The seed’s roots and stem grow

Peach seeds come

from a fruit.

A seed germinates

into a seedling.

11

A seedling, or young plant, has now

grown

The seedling will grow

It will change into an adult peach tree

The seedling grows into a peach tree with fl owers.

The tree’s peach seeds can grow into new trees.

germinate begin to grow

seed coat a hard outer covering of a seed

and carries water and nutrients

to the leaves

1 What are some things plants need to grow?

2 What are some parts of a plant?

3 What source would you use if you wanted to learn more about peach trees? What source would you use if

you wanted to know where the word peach

came from? Use these sources to write a couple of sentences about peach trees.

4 Main Ideas and Details What is the main

idea of page 6? What details support this idea?