3B双语探究Blue Planet 复习资料

Living things need sunlight, shelter, food, water and air.
Living things move in different ways: walk, fly, hop or swim.
Some animals live in the forest, some in the desert, and others in the ocean.
1. Living things are born. Then they grow and reproduce. Later on, they die. born 出生grow 生长reproduce 繁殖die 死亡
2. How do animals reproduce?
To reproduce, some animals lay eggs （下蛋）. Some animals have live babies （生出活的孩子）. People have live babies.
Fish, hens, frogs, ostriches(鸵鸟), penguins（企鹅）, crocodiles（鳄鱼）lay eggs. People, dogs, elephants, monkeys, horses, dolphins have live babies.
3. What’s the name of a baby butterfly? Caterpillar.
What’s the name of a baby frog? Tadpole.
Caterpillars and tadpoles don’t look like their mother.
4. The life cycles of butterflies 蝴蝶的生命周期
A butterfly lay its eggs on a leaf.
A caterpillar hatches from an egg. hatch 孵化
The caterpillar eats leaves and grows.
The caterpillar spins a chrysalis around itself. chrysalis 蛹，茧
The caterpillar grows inside the chrysalis.
The caterpillar changes to a butterfly inside the chrysalis. change 改变
The butterfly comes out of the chrysalis.
The butterfly dries (dry的三单形式) its wings and is ready to fly.
5. The life cycle of frogs
Eggs ------- tadpole (with tail) ------- tadpole (with legs) ------- tadpole (with arms and legs) ------- tadpole (with shorter tail) ------- frog (no tail)
Frogs live near or in water.
Frogs eat worms and insects. worm: 虫，蠕虫
Frogs lay their eggs in the water.
An egg grows into a tadpole.
A tadpole swims by wiggling its tail.
A tadpole’s tail grows shorter.
A tadpole grows into a frog.
6. What are the parts of a plant?
Roots, stems, flowers, buds, and leaves.
Functions: 功能
What do the flowers do? The flowers make the seeds.
What does the stem do? The stem takes water from the roots to the leaves.
What do the leaves do? The leaves make food for the plant.
What do the roots do? The roots hold the plant and take in water and minerals（矿物质）from the soil（土壤）.
7. What do plants need in order to live?
Plants need sunlight, soil, water and air.
8. There are three main types of leaf edges. 叶边有三种主要的类型：smooth 平滑的toothed 有齿的，锯齿的lobed 浅裂的，分裂的
9. A scientist investigate（study）things. （科学家调查研究事物）
10. What part of plant do we eat?
The part of the plant we eat:
We eat the stems: celery 芹菜
We eat the leaves: spinach 菠菜
We eat the flowers: broccoli 西兰花
We eat the roots: carrot
We eat the fruit: peach
We eat the seeds: corn 玉米。