Science Year 3

Science Year 3 / Sains Tahun 3.

Apa itu ciri-ciri luaran haiwan?

Ciri-ciri luaran haiwan ialah bahagian luaran atau anggota luaran haiwan yang boleh dilihat dengan mata kasar. Ada berbagai jenis haiwan yang hidup di dunia ini. 

Kesemua haiwan ini ada ciri-ciri luaran yang tersendiri dan ada yang sama dan ada yang berbeza. Haiwan -haiwan ini dapat dikenalpasti dengan menggunakan ciri-ciri luarannya.

Contoh ciri-ciri luaran pada haiwan:

Seekor ular ada sisik di seluruh badan, tiada kaki, badan yang panjang  serta ekor yang panjang.

Seekor ayam ada mempunyai dua kaki, paruh , ekor , badan dipenuhi dengan bulu pelepah, ada dua kepak

Seekor gajah mempunyai empat kaki, badan yang besar, dua telinga yang besar, ekor, belalai, dan dua gading dan badan dipenuhi dengan rerambut.

Seekor lembu pula mempunyai empat kaki, dua tanduk, ekor yang panjang

Ular - tiada kaki tetapi bagaimanakah ia bergerak?

More activities

More activities at the following link.

http://ppdhl.net/courseware/ScienceY3/cd1/lesson/main/

Elephants

Fun Elephant Facts for Kids

Check out these interesting elephant facts and learn more about the biggest land mammal in the world.

Elephants are unique animals that live in parts of Africa and Asia. Scroll down for more information.

• There are two types of elephant, the Asian elephant and the African elephant (although sometimes the African Elephant is split into two species, the African Forest Elephant and the African Bush Elephant).
• Elephants are the largest land-living mammal in the world.
• Both female and male African elephants have tusks but only the male Asian elephants have tusks. They use their tusks for digging and finding food.
• Female elephants are called cows. They start to have calves when they are about 12 years old and they are pregnant for 22 months.
• An elephant can use its tusks to dig for ground water. An adult elephant needs to drink around 210 litres of water a day.
• Elephants have large, thin ears. Their ears are made up of a complex network of blood vessels which with regulating an elephants temperature. Blood is circulated through their ears to cool them down in hot climates.
• Elephants have no natural predators. However, lions will sometimes prey on young or weak elephants in the wild. The main risk to elephants is from humans through poaching and changes to their habitat.
• The elephant’s trunk is able to sense the size, shape and temperature of an object. An elephant uses its trunk to lift food and suck up water then pour it into its mouth.
• An elephant’s trunk can grow to be about 2 metres long and can weigh up to 140 kg. Some scientists believe that an elephant’s trunk is made up of 100,000 muscles, but no bones. 
• Female elephants spend their entire lives living in large groups called herds. Male elephant leave their herds at about 13 years old and live fairly solitary lives from this point.
• Elephants can swim – they use their trunk to breathe like a snorkel in deep water.

Zebra

Zebra

 Zebra Types:

There are three zebra species: the mountain zebra, the plains (or common) zebra, and the Grevy's zebra. The plains zebra includes six subspecies, and each differs in the pattern of their black and white stripes.

Huge Herds:

They all graze in large herds on tall grasses. Some zebra herds number in the tens of thousands, but within these larger herds are distinct family groups composed of a male, several females and their young.

Mysterious Stripes:

 It has often been suggested that the stripes of zebras serve as camouflage in tall grasses. But the fact that they make no attempt to hide and freeze when a predator is seen — indeed, they become noisy and active — seems to contradict this theory.

Fun Gorilla Facts for Kids

Fun Gorilla Facts for Kids

Gorillas are endangered species that are constantly under threat from disease and commercial hunting. Their importance is further enhanced by the fact that they are close relatives to humans, sharing around 98% of the same DNA. Learn more by reading our list of gorilla.

• There are only about 700 mountain gorillas and they live high in the mountains in two protected parks in Africa. Lowland gorillas live in central Africa.
• You may have seen baby gorillas being carried on the back of their mothers, but for the first few months after birth the mother holds the baby gorilla to her chest.
• An adult male gorilla is called a silverback because of the distinctive silvery fur growing on their back and hips. Each gorilla family has a silverback as leader who scares away other animals by standing on their back legs and beating their chest!
• Young male gorillas usually leave their family group when they are about 11 years old and have their own family group by the age of 15 years old. Young female gorillas join a new group at about 8 years old.
• Gorillas are herbivores. They spend most of their day foraging for food and eating bamboo, leafy plants and sometimes small insects. Adult gorillas can eat up to 30 kilograms of food each day.
• ·An adult gorilla is about 1 meter tall to their shoulders when walking on all fours using their arms and their legs.
• A gorilla can live for 40 – 50 years.
• Gorillas are considered to be very intelligent animals. They are known for their use of tools and their varied communication. Some gorillas in captivity at a zoo have been taught to use sign language.
• Gorillas are endangered animals. Their habitat is destroyed when people use the land for farming and the trees for fuel. Gorillas are also killed by poachers and sometimes get caught in poacher’s snares meant for other animals.