Growing and changing 成長與變化
Life cycles(生命周期)
Metamorphsis(【生物】變態(tài))
All living things changes as they grow.Some change completely and the young look nothing like the adult.This is metamorphsis(變態(tài))
Frog
A frog is an amphibian. It starts life as an egg in a blob of jelly (frog spawn).It emerges ad a tadpole,which gradually changes into a tiny frog.
Butterfly
A butterfly is an insect. It starts life as a tiny egg. A caterpillar (larva幼蟲)comes out of the egg.It feeds and grows.
The caterpillar forms a chrysails(pupa)蛹.Inside the chrysalis an adult butterfly (成年蝴蝶)is forming.Later,the butterfly emerges.If it is female it mates with a male (雄性)butterfly and lay eggs.The cycle starts again.
Bird life cycle
A chicken is a bird .Like all birds , a female chicken lay eggs. If the female (雌性)has mated(交配) with a male,a chick develops inside each egg.A few weeks later ,the egg hatches(孵化).The chick that comes out grows into an adult chicken.
Mammal life cycle
Huaman are mammals.
You started life as a foetus(胚胎、胎兒)inside your mum.You were born as a helpless baby (嬰兒)and grow into a toddler(學(xué)步小孩) and then a child(小孩). During puberty(青春期) your body changes as you move towards adulthood(成人).
