- Get to know blue whales, killer whales, sharks, and read Chinese and English;
- Learn to count and calculate the total;
- Like to explore the underwater world, interested in knowing more.
Prepare paper and pens for recording.
1 Guessing import
A big ship floats on the sea without burning any fuel, and white waves rise on the sea, without carrying goods or guests.
Calling a fish is not a fish, it lives in the sea all its life, looks like a fountain from a distance, and looks like an island up close.
Observe courseware screen
Discuss: what is this?
Tip: You can point to the swimming creature, and you will hear its cry or name, and children can read it along.
Follow up: Blue Whale, Killer Whale, Shark, This is Blue Whale, This is Killer Whale, Hunter of the Sea – Shark, Blue Whale – Largest Sea Life, This is Blue Whale, Tiger Whale, This is Shark.
2 Meet blue whales, killer whales, and sharks
Have you ever heard of the blue whale? What do you know about it?
The blue whale is the largest mammal in the world, with a length of 22-33 meters and a weight of 150-180 tons, which is equal to the weight of 2000-3000 people. It is said that 50 people can stand on its tongue.
It is the loudest of all animals on earth, louder than an airplane taking off.
Its food is mainly krill, jellyfish, small fish and diatoms. It often opens its mouth wide on the water surface and swallows food and seawater together, then closes its mouth, seawater is filtered out from the crevice, and the food is swallowed. inside.
A blue whale needs to eat 4-8 tons of small krills every day. If the food in its stomach is less than 2 tons, it will panic with hunger.
It needs to come up to the surface to take a breath every 10-15 minutes. At this time, it will spray a water column up to about 9 meters from its nostrils.
Blue whales usually move alone, and there are also 2-3 together. The situation together is basically a family, and they get along very harmoniously.
The life span of blue whales is generally over 50 years old, and can live up to 100 years old.
At present, the number of blue whales in the world is only about 3000-4000.
The natural enemy of the blue whale is the killer whale.
In addition to the blue whale, there is another kind of killer whale. Can the children find out where the killer whale is?
Size and life
Killer whales have white patches on their bodies, are generally 8-9 meters long, and weigh 3-9 tons. Killer whales like to live in groups, and their natural life span can reach 80-90 years (the life span of breeding is shorter).
Killer Whales and Blue Whales
Both are cetaceans, the blue whale is the largest among the cetaceans, and the killer whale is the most brutal by nature. If they meet and go to war, who will win?
Among the more than 1 million species of animals in nature, the blue whale is recognized as the most powerful individual. Known as the super hercules in the animal kingdom. But when this strong man meets a killer whale, he needs to stay away.
Because killer whales are brutal and gluttonous by nature, with sharp teeth, and they often travel in groups. Often kill seals, sea lions, walruses, and attack other cetaceans in the sea. They will attack the huge blue whale in groups, and their ferocity is the same as the “tiger” in its name, and they look down upon the cetaceans.
Therefore, when a strong man like a blue whale encounters a killer whale and goes to war, it is often the best strategy to escape.
Have you ever seen a shark?
Sharks are cartilaginous fishes with a wide variety, about 250 to 300 species. The small ones are only 18cm in length and the large ones can reach 18 meters. Whale sharks are the largest sharks. Hammerhead sharks with hammer-like mouths (also known as hammerhead sharks) are 4.5m long and weigh about 1 ton. They are terrible man-eating sharks.
Because sharks are almost all carnivorous species. It swims very fast, has extremely sharp teeth, and some even attack small boats.
3 Swim to the aquarium
Although these sea creatures are huge, we are playing games now, so children don’t need to be afraid. The game is called “Swim to the Aquarium”. Let’s first listen to how it works. (The teacher opens the help voice in the courseware toolbox and clicks to play)
Every child has an aquarium in his toolbox. Ask the children to drag blue whales, killer whales and sharks into it, compare who has the most, count the total, record it, and line up the aquarium to tell us about you method of queuing.
1) Children do their own activities, count after completion, what is the number of each type of underwater creature? Team members line up the aquarium together, count the total, and record the results;
2) Group challenge activities, such as:
By quantity: the first group completed 20, the second group 21, the third group 22…
By container: Please use 3 aquariums per group, complete the dragging.
Split evenly: Group members each drag an equal number of sea creatures into each aquarium.
By category: the first group dragged sharks, the second group dragged blue whales, the third group dragged killer whales…
According to category 2: each group drags in 2 kinds of sea creatures, or each group drags in 1 kind of sea creatures.
By color: the first group is dragged into blue, and the second group is dragged into black and white…
Check the recorded results and praise the group with clear records and pleasant cooperation.
Thinking: To love animals and nature is to love human beings themselves. So how do we live in harmony with marine life?
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