ALL ABOUT PLANTS.

2 All about plants

Characteristics of plants

Classification of plants. With flowers and without flowers

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IINDEX NDEX

Nutrition Interaction Reproduction Project 1 Project 2

Parts of a plant. Roots, stem, leaves and flower Vital functions of plants.

CONTENTS:

1. Characteristics of plants. 2. Classification of plants: . With flowers . Without flowers. 3. Parts of a plant: roots / stem / leaves / flowers. 4. Vital functions of a plant: a . Nutrition: .- Photosynthesis b. Interaction.

c. Reproduction:

Sexual reproduction in plants with flowers: Pollination / fertilization / germination

Asexual reproduction in plants: Spores, stolons, bulbs… 5. Uses of plants.

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CHARACTERISTICS OF PLANTS.

1. Plants make their own food. 2. They usually have roots, stems and leaves. 3. They do not have senses. 4. They are usually green. 5. They can react 2.–

CLASSIFICATION OF PLANTS:

2.1.– Plants without flowers: like moss and fern.

2.2. Plants with flowers or seed plants: (grass, bushes, trees…).

Grasses are the smallest plants. Grasses have a green, thin, flexible stem.

Bushes are bigger than grasses. Bushes have a thin, woody stem, which divides into branches close to the ground.

Trees are the biggest plants. Trees have a thick, woody stem called trunk, with branches that grow high above the ground.

They can be evergreen or deciduous trees.

PLANTS are living beings with chlorophyll that can produce their own food and they can’t move from the soil.

The bonsai is a plant.

Moss

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C.E.I.P.

ANA (Madridejos)

SCIENCE 3. UNIT 2. PLANTS.

SANTA

Fern

3.- PARTS OFAPLANT:

All plants with flowers have the same structure:

THE PARTS OF A PLANT are:

. Roots: absorb water and nutrients.

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– Stem: gives support and it transports nutrients.

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– Leaves: make food (photosynthesis).

. Flower: reproductive system of the plant.

3.1.– Roots: are under the ground and support the plant. They absorb water and minerals from the soil.

3.2. The stem: grows up from the soil and su pports the leaves. It carries water and minerals from the roots to the leaves.

3.3. The leaves: grow from the stem and branches and are usually green. Make food.

3.4. The flowers: are the reproductive organs of plants. They attract insects.

VOCABULARY:

. roots: . branches: . stem: . petal: . trunk: . moss: . leaves: . fern: . flowers: . seed: . ground: . bush: . soil: . tree:

roots, stem, leaves or flowers:

It transports water and minerals to the leaves:

They take water and minerals from the ground:

They make food for the plant:

They can be many different colours:

Photosynthesis happens here:

They have got pollen:

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1.Write

A.

B.

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F.

Photosynthesis is the process by which plants use sunlight, water and carbon dioxide to create oxygen and energy in the form of sugar.

1. Leaves absorb sunlight. 2. Leaves get carbon dioxide from the air. 3. Roots take waterand minerals from the soil. 4. Water and minerals travel from the roots to the leaves.

5. Plants make food with the sunlight, water and minerals. They release oxygeninto the air for us to breathe.

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VITALFUNCTIONS OFAPLANT:

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NUTRITION: 1

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INTERACTION FUNCTION IN PLANTS:

Plants do not have sense organs, but they can react to some stimuli: light, humidity, gravity, temperature...

They cannot move from the soil, but they can move only their stems and leaves can move to the light, their roots can grow down looking for water and nutrients…

Plants detect temperature changes. They know when winter ends. They know when to grow leaves and when to flower.

Some plants react to stop an insect attack or other living beings. This plant releases a bitter substance, like acacia from savannah.

Acacia needs lot of sunlight.

Cactus need little water and resist high temperatures.

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Photropism

Geotropism Hydrotropism

LIFE CYCLE OF PLANTS.

To grow, plants need lots of sunlight and water and the right kind of soil.

1. Plants are born

2. They grow 3. They reproduce 4. They die

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During the life of a plant: The stem grows taller and thicker. Branches grow from the stem. The roots grow down into the ground. They divide into smaller roots, like branches. The leaves get bigger and new leaves grow. The plant grows fruit and reproduces. QUESTIONS: 1 What are the parts of a plant? 2. –Why is photosynteshis important? 3. What kind of stem does a tree have? 4. In what part ofthe plant is chlorophyll?

REPRODUCTION OF PLANTS.

To reproduce, most plants grow flowers. Flowers grow in the spring. We can see the parts of a flower in the picture.

POLLINATION.

The pistil is the female part of the flower. The stamens are the male part of the flower. Plants need pollen from another flower.

When they get pollen: How they get pollen?

FERTILIZATION.

The pistil changes into a fruit Seeds form inside the fruit.

GERMINATION.

When the fruit falls to the ground a new plant can grow from the seed.

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HOW DO SEEDS TRAVEL?

The wind transports seeds. Water can transport seeds. Animals can transport seeds.

Match the seeds to the plant:

Which fruits have only one seed? Which fruits have many seeds? Stone or pips?

Let’s investigate! Take a tablet and look for fruits and seeds.

FRUIT NUMBER OF SEEDS SIZE OF SEEDS COLOUR OF SEEDS

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Imagine a world with no plants. What things wouldn’t you have?

Think of three plants that we eat: Choose three things made from plants: Find out a medicine that we get from plants:

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5. USES OF PLANTS

LET’S INVESTIGATE! MEDICAL PLANTS Why do we use these medical plants? ALOE VERA MINT VALERIAN ROSEMARY EUCALYPTUS JASMINE GINGER LINDEN CAMOMILE GARLIC

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