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READER TITLE: ALL ABOUT PLANTS

SUBJECT AREA: THE WORLD OF SCIENCE AND TECHNOLOGY

READER TITLE: ALL ABOUT PLANTS

TEXT 1: PLANTS IN OUR WORLD

 

Plants are living things. They feed, breathe, grow, and make new plants, but they are different from animals. Plants don't move from place to place like animals do. Plants keep growing, but animals don't grow when they are older.

 

Scientists don't know how many plants there are, but they think that there are more than 300,000 types! Many of these plants grow in rainforests. Scientists think that there are thousands more plants that we don't know about yet.

 

There were plants on Earth more than two billion years ago! The first plants didn't grow on land - they grew in water. It took hundreds of millions of years for plants to change and to grow on land.

 

Before plants, animals did not live on Earth. There was no oxygen in the air, and animals need to breathe oxygen. Plants produced oxygen and food for animals. They made life possible for us!

 

Discover! Plants started to grow on land more than 400 million years ago. This is a fossil of one of the first land plants.  

 

 


SUBJECT AREA: THE WORLD OF SCIENCE AND TECHNOLOGY

READER TITLE: ALL ABOUT PLANTS

TEXT 2: DIFFERENT PLANTS

There are many different types of plant. Scientists put plants into different groups. They think about how plants grow and how they make new plants.

 

Most plants make seeds. These plants are called seed plants. New plants grow from the seeds. Many seed plants produce flowers. These plants are called flowering plants. Most of the plants that you see around you are flowering plants. How many flowering plants do you know?

 

Some seed plants produce cones, not flowers. These plants are called conifers. Some of the world's tallest trees are conifers.

 

Plants that don't make seeds are called non-seed plants. Ferns and mosses are non-seed plants. They don't make seeds, but they make tiny spores. New plants grow from these spores.

 

 

Discover! The biggest cones can be 40 centimeters long and they can weigh 4 kilograms!

 

 


 

SUBJECT AREA: THE WORLD OF SCIENCE AND TECHNOLOGY

READER TITLE: ALL ABOUT PLANTS

TEXT 3: PLANTS PARTS

 

A flowering plant has four main parts-leaves, stems, roots, and flowers. The roots hold the plant in the soil. They take water and minerals from the soil. The leaves make food for the plant. The stems take water from the roots to the leaves. They also take food from the leaves to other parts of the plant. The stems support the plant, too. The flowers make seeds, and new plants grow from these seeds.

 

Different vegetables come from different parts of a plant. Potatoes are from the roots of a plant. Asparagus is the stem. Cabbages are leaves. Broccoli is the flower. Food like apples and oranges are fruits. Fruits grow from flowers, and the plant's seeds are in the fruit.



 

Discover! The biggest seeds are from the coco de mer plant. They can weigh 30 kilograms - that's about the same as a child who is ten years old!  

 

 


SUBJECT AREA: THE WORLD OF SCIENCE AND TECHNOLOGY

READER TITLE: ALL ABOUT PLANTS

TEXT 4: THE LIFE OF A PLANT

Plants change at different times of their life. They grow and make new plants. When they get old, they die. This is called a life cycle.

1 A new seed needs water, oxygen, and warmth to start to grow into a plant.

2 The plant grows bigger and produces leaves.

3 Then the plant produces flowers. The flower has male and female parts. The female part of the flower has eggs. The male part of the flower makes pollen.

4 To make new seeds, the pollen from one flower has to get to the eggs of another flower. The plant needs the wind or insects, like bees, to help. This is called pollination.

5The pollen and the eggs join together and make seeds that grow inside a fruit. Some plants die after this, but other plants grow and make new seeds for many years.

Discover! Seeds can live for many years before they grow into a plant. The oldest seed to grow into a plant was 1,300 years old!
6 The seeds can't grow if they are too near each other. Animals or the wind take some of the fruit away from the plant. This gives the seeds more space so that they can grow.

 

 


Date: 2016-01-14; view: 2193


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