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makes perfection listening and practicing turning pain into gain seven years ago Mackenzie barup hurt her knee she was only 10 years old a week later the pain was still there the pain didn't stop then she found out about a disease called RSD this disease tells the brain that her knee is still injured even though it isn't, there is no cure for the pain, her knee feels terrible all the time, sometimes Mackenzie felt so bad that she stayed in bed for months, it was very difficult to walk, his doctors tried everything. medicine exercise and other treatments nothing worked except books Mackenzie read a lot of books the books helped her stop thinking about the pain and she decided to help other children forget their pain she also discovered a children's treatment center nearby the center had a new library but there were no books, he asked all his friends and his parents' friends to give him books, then he put ads in the newspapers and created a website.

MacKenzie's goal was to donate 300 books to the library, but soon she had 3,000 books and today there were more on the way. The number is more than forty thousand. She founded an organization. Shelter books now help children in many states in the US. MacKenzie still has her knee hurt all the time, but she feels better because she is helping other children with her pain by listening and practicing. the mammals. Mammals are the only animals that give birth to their young. They do not lay eggs like fish, amphibians, reptiles or birds. Yes, mammals. Mothers are special because they produce milk for their babies to drink.

Today we can find many different types of mammals, some of which live in the land like horses camels and monkeys others live in the ocean like whales and dolphins bats are special because they are the only mammals that can fly did you know that you are also a mammal listen and

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some animals live in fresh water they live in rivers and lakes fish frogs beavers and ducks live in fresh water large animals also live in fresh water the Nile crocodile lives in rivers and lakes in Africa when large animals come to drink it drags them under the water and land animals eat them They also need water.

They drink water in the African savanna. Animals like zebras, giraffes and elephants come to the water well to drink. The savannah can be very hot and dry and these animals cannot live without water. Hippos need water to keep their skin healthy. They stay in the water all day to stay cool if they don't have water. sunburn listen and practice earthquakes and tsunamis thank you usually the earth's crust moves very slowly only a few millimeters each year sometimes two parts of the crust move suddenly in different directions and then there is an earthquake earthquakes are dangerous because buildings sometimes they fall when there is an earthquake.

People in buildings hide under a heavy table or stand between two rooms. These are good ideas. They can help keep people safe. There are also earthquakes under the ocean. They are generally small and not dangerous. Sometimes an earthquake under the ocean produces a giant wave called a tsunami tsunamis can be very dangerous after a tsunami there are often floods there is water everywhere houses there are cars and trees in the water the water is not clean many people are sick in 2004 there was a very big tsunami in the Indian Ocean many people died listen and practice mountains and lakes the largest mountain range in the world is the Himalayas in Asia it started when two pieces of the earth's crust met and moved upwards they started to move about 50 million years ago and now they are moving very slowly.

The top of Mount Everest in the Himalayas is the highest place on Earth, it is about nine kilometers above the ocean. Everest is very big and is getting bigger. The summit of Everest rises about five millimeters each year because the Earth's crust moves all the time near high mountains. Often deep lakes The deepest lake in the world is Lake Baikal in Russia. It is more than 1,600 meters deep. Scientists are exploring the lake in small submarines. Lake Baikal began when pieces of the Earth's crust moved and formed a deep hole. Water from 330 rivers flows into the lake.

Baikal there is more water here than in all the large lakes of North America. Thank you. Listen and practice how to make medicines. Medicines made in laboratories and factories are often copies of medicines made from plants. Malaria is a disease that causes fever and can kill people. It is contracted when an insect called a mosquito bites them to cure malaria. People first made medicine from quinine. Quinine is a substance that comes from a rainforest tree. Then scientists began making copies of this drug in a laboratory. Today, quinine medicines are made without plants. of medicines have been made from rainforest plants if people cut down rainforests we will lose plants that could produce more medicines listen and practice ocean animals many animals live in water some animals live in salt water they live in seas and oceans the largest marine animal is the blue whale it can be more than 30 meters long and 200 metric tons it feeds on very small marine animals called krill it can eat four metric tons of krill in a day blue whales live in most oceans the blue whale is the largest animal in the world The Earth can be as big as 25 elephants.

Many other animals live in salt water. There are sharks and many other fish. All ocean animals need water to provide them with food and oxygen. Jellyfish are not fish, they are invertebrates, they do not have the skeleton they need. water to sustain their bodies listen to and practice traditional medicines in many places around the world people mainly use traditional medicines traditional medicines are medicines that people have used for hundreds of years or more traditional medicines are made from plants and animals such as insects, For example, most people in Africa use traditional medicines and many people in Asia do too.

In some places people use traditional medicines because they do not live near a hospital or because traditional medicines are cheap. In other places people use both traditional medicines and medicines made by Scientists in the Laboratories listen and practice when we think of deserts, we imagine rocks and sand and a very hot and dry place. It is difficult to live in a hot desert, but some plants and animals are adapted to this ecosystem. Deserts are dry because it almost never rains. Desert plants collect rain and store it so they can live during the dry season. Cacti have stems that grow fat when filled with water.

They also have sharp spikes to prevent thirsty animals from breaking the stems to drink the water inside.