Wonderful Water
Đọc · Nghe · Từ vựng · Bài tập · Dự án · Từ điển tranh
Salt Water
1 Đọc trang sách
2 Đọc & Nghe
About 70% of Earth is covered with water. Most of the water is in the oceans. There are five oceans – the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean, and the Arctic Ocean.
The largest ocean is the Pacific Ocean. It's 156 million square kilometers. It's about 15 times bigger than the USA.
There are also many seas on Earth. The largest sea is the South China Sea. It's 3 million square kilometers.
One of the smallest seas is the Marmara Sea. It's only about 11,000 square kilometers.
All the water in the oceans and seas is salt water.
The Dead Sea is about 30% salt. It's the saltiest sea on Earth. It's so salty, you can float in it.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. Atlantic _____.
2. Pacific _____.
3. Dead _____.
4. Southern _____.
5. South China _____.
6. Indian _____.
7. Arctic _____.
8. Marmara _____.
9. There are _____ oceans.
10. The Dead Sea is _____% salt.
11. The South China Sea is _____ million square kilometers.
12. _____% of Earth is covered with water.
13. The Pacific Ocean is _____ million square kilometers.
14. The Pacific Ocean is _____ times bigger than the USA.
15. The Marmara Sea is _____ square kilometers.
16. Write the ocean/sea names shown on the world map.
17. Where do you live? Mark your country on the map.
Câu trả lời tự do — không tính vào điểm.Fresh Water
1 Đọc trang sách
2 Đọc & Nghe
About 3% of the water on Earth is fresh water. Most of this fresh water is frozen. It's ice. It's in glaciers or polar ice caps.
Some of the fresh water is in lakes and rivers. One of the biggest lakes on Earth is Lake Superior in North America. It's about 82,000 square kilometers.
The longest river on Earth is the River Nile in Africa. It's about 6,700 kilometers long.
Some of the fresh water is in the sky. It's in the clouds and the rain.
Some of the water is in the soil, in rocks, or under the ground in caves.
Most of Earth is covered with water, but only about 1% is fresh water that we can drink. The rest is salt water or ice.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. 30% of Earth's water is fresh water.
2. Some of the fresh water is in the ocean.
3. Some of the fresh water is ice.
4. The longest river in the world is in North America.
5. Some fresh water is in clouds and rain.
6. We can drink all the water on Earth.
7. Find the seven fresh-water words.
8. Write the seven words shown in the activity pictures.
9. Some of Earth's fresh water is in _____.
10. Some of the water is in _____.
11. Some of the water is in _____.
12. Some of the water is under the _____.
13. Some _____ water helps plants grow.
The Water Cycle
1 Đọc trang sách
2 Đọc & Nghe
Do you know where water comes from? When it rains, water falls from the sky. This is called precipitation.
Rainwater goes into streams. Stream water goes into rivers. River water goes into seas and oceans.
When it's sunny, the ocean water gets warm. Some water goes up into the sky. This is called evaporation.
The water in the sky makes clouds. Then it rains again. This is called the water cycle.
We're lucky to have water in our homes. About one billion people don't have clean water in their homes.
Most of the water we use comes from rivers and reservoirs. Clean water goes through pipes to our homes.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. Water-cycle label 1: choose the correct word.
2. Water-cycle label 2: choose the correct word.
3. Water-cycle label 3: choose the correct word.
4. Water-cycle label 4: choose the correct word.
5. Water-cycle label 5: choose the correct word.
6. Water-cycle label 6: choose the correct word.
7. Put the water-cycle sentences in order.
- It rains again.
- River water goes into the ocean.
- It rains.
- The water goes up into the sky and makes clouds.
- Rainwater goes into streams.
- It's sunny and the ocean gets warm.
- Stream water goes into rivers.
8. Follow the water from source to home.
- reservoir
- clean water
- pipe
- home
- dirty water
9. The water we use comes from rivers and reservoirs.
10. The water in the reservoir is too dirty to drink.
11. Dirty water goes through pipes to our homes.
12. Everybody has clean water at home.
Water at Home
1 Đọc trang sách
2 Đọc & Nghe
We use a lot of water at home. We drink water and we cook with water. We also use water for washing.
We use about 80 liters of water when we take a bath.
We use about 27 liters of water when we take a shower.
We use water to brush our teeth and we also need water to flush the toilet. We use about 9 liters of water every time we flush.
We use water to wash and clean other things, too. We wash the dishes with water.
We wash clothes with water. We wash and clean everything in the house with water.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. I flush _____.
2. I take a _____.
3. I _____ some water.
4. I get _____.
5. I brush _____.
6. I wash _____.
7. I cook _____.
8. I watch _____.
9. I read _____.
10. I wash _____.
11. We use _____ liters of water to take a shower.
12. We use _____ liters of water to take a bath.
13. We use _____ liters of water to flush the toilet.
14. What do you use water for at home?
Câu trả lời tự do — không tính vào điểm.Water Activities
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2 Đọc & Nghe
We use a lot of water outside the home. We need water for the food we eat.
Meat comes from animals, and animals drink water. Fruits and vegetables also need water to grow.
We need water to travel. We can travel by ship and by boat.
We can also make power with water. Hydroelectricity is electricity made from water.
We have fun with water. We like to go to the beach in the summer. We also like to visit rivers and lakes.
Lots of sports need water. Sailing, surfing, swimming, waterskiing, and diving all use water.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. Write the six water-activity words shown in Activity 1.
2. Match the beginnings and endings.
3. Classify the sports.
We Need Water
1 Đọc trang sách
2 Đọc & Nghe
The human body contains lots of water. Our body is about 70% water. Our brain is about 85% water and our bones are about 33% water.
Water is very important for the human body. We can live for four weeks without food, but we can't live for more than about three days without water.
We need to drink about eight glasses of water every day. We need to drink even more water when we play sports and when it's hot.
We need water because it keeps our blood healthy. Our blood is about 50% water.
Blood takes food to different parts of our body. It takes oxygen from our lungs to other parts of our body, too.
If we don't drink water, our body gets dehydrated. If we're dehydrated, our kidneys and our brain don't work. Then we get very sick.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. Label the five body parts.
2. 85% of our _____ is water.
3. Our _____ takes food to different parts of the body.
4. 33% of our _____ is water.
5. If we're dehydrated, our _____ doesn't work.
6. About _____% of our body is water.
7. We can live for _____ weeks without food.
8. We can't live for more than about _____ days without water.
9. We need to drink _____ glasses of water every day.
10. How much of our body is water?
11. What does blood take to different parts of the body?
12. How long can we live without water?
13. What happens if we don't drink water?
Ocean Animals
1 Đọc trang sách
2 Đọc & Nghe
Lots of animals live in water. Some animals live in salt water. They live in seas and oceans.
The biggest ocean animal is the blue whale. It can be more than 30 meters long and 200 metric tons.
It eats very small ocean animals called krill. It can eat 4 metric tons of krill in a day. Blue whales live in most of the oceans.
Many other animals live in salt water. There are sharks and lots of other fish. All ocean animals need water. Water gives them food and oxygen.
Jellyfish are not fish – they are invertebrates. They don't have a skeleton. They need water to support their bodies.
The blue whale is the biggest animal on Earth. It can be as big as 25 elephants.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. The water in seas and oceans is salt water.
2. The blue whale lives in the ocean.
3. Sharks are the biggest ocean animals.
4. Fish need oxygen.
5. Jellyfish have skeletons.
6. An elephant is bigger than a blue whale.
7. The blue whale is the _____ ocean animal.
8. It can be more than 30 _____ long.
9. It can be as _____ as 25 elephants.
10. It eats lots of little _____.
11. Blue whales live in most _____.
12. Water gives ocean animals _____.
13. Water gives ocean animals _____.
14. Water _____ jellyfish bodies.
15. Draw and write about two ocean animals.
Câu trả lời tự do — không tính vào điểm.Other Animals
1 Đọc trang sách
2 Đọc & Nghe
Some animals live in fresh water. They live in rivers and lakes. Fish, frogs, beavers, and ducks live in fresh water.
Big animals also live in fresh water. The Nile crocodile lives in rivers and lakes in Africa.
When large animals come to drink, it pulls them under the water and eats them.
Land animals need water, too. They drink water.
In the African savannah, animals like zebras, giraffes, and elephants come to the waterhole 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 water all day to keep cool. If they don't have water, they get sunburnt.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. Classify the animals by water type.
2. Match the animals with the descriptions.
3. Draw and write about a land animal that you like.
Câu trả lời tự do — không tính vào điểm.Too Much Water
1 Đọc trang sách
2 Đọc & Nghe
Floods can happen when there is too much rain. Rivers and lakes become very full.
Floods can also happen when there are very big waves in the ocean.
Where there are floods, the water covers roads and paths. Cars and people can't get out of the area.
The water goes into houses, and people have to leave their homes. Sometimes they have to get on the roof of their house to wait for help.
Cars and people can't get into the area to help. The police and firefighters rescue people with boats and helicopters.
Floods can be very dangerous. The water moves fast and it's very strong. Don't play in flood water.
Just 60 centimeters of water can make a car float.
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. Floods happen when there is too much _____.
2. People need to _____ their homes.
3. The police rescue people with _____.
4. _____ in flood water!
5. Complete the flood-word puzzle.
- 1 Hàng ngang: the top of a house
- 2 Hàng ngang: an aircraft used for rescue
- 3 Hàng ngang: a home building
- 4 Hàng ngang: a water vehicle
- 5 Hàng ngang: cars travel on this
- 6 Hàng ngang: road vehicles
6. Color the flood picture and write the flood-safety words.
Câu trả lời tự do — không tính vào điểm.Save Water!
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2 Đọc & Nghe
When there is no water, rivers and lakes become dry. Plants can't grow and animals can't drink.
If there is no food and no water to drink, people die, too. Water is very important. We all need to save water.
You can save water at home. Turn off the water when you brush your teeth.
Take a shower, not a bath.
You can also save water outside the home. Collect rainwater to water plants.
Don't throw things into rivers or lakes. People and animals need clean water, not dirty water.
Remember! Our Earth needs water. People, animals, and plants need water. Save our wonderful water!
Từ vựng
3 Xem trang bài tập
4 Bài tập tương tác
1. Don't turn off the water.
2. Turn off the water.
3. Take a shower.
4. Take a bath.
5. Collect rainwater.
6. Don't collect rainwater.
7. Don't throw things into rivers.
8. Throw things into rivers.
9. Design a poster about how to save water.
Câu trả lời tự do — không tính vào điểm.Dự án
Từ điển tranh
Từ điển tranh
