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moon in the night.
The sun is much bigger than the earth, and the earth is bigger than the moon. So the sun is the biggest
and the moon is the smallest. The earth goes round the sun day and night. It goes at 30 kilometers a
second.
The moon is our satellite (卫星). It is also our neighbor. It goes round the earth all the time. The moon
goes at 8 kilometers a second. The moon can't give out light or heat itself, and nothing can live on it.
Men live on the earth. It is going round itself all the time. The earth gives us lives, food, water and so
on. We must get on well with it.
2. The e_____ is bigger than the moon, but s_____ than the sun.
3. The m_____ goes round the earth.
4. We can see the moon in the n_____.
5. Men must get on w_____ with the earth
and the moon in the night.
The sun is much bigger than the earth, and the earth is bigger than the moon. So the sun is
the biggest and the moon is the smallest. The earth goes round the sun day and night. It does at
30 kilometers a second.
The moon is our satellite (卫星) . It is also our neighbor. It goes round the earth all the time.
The moon goes at 8 kilometers a second. The moon can't give out light or heat itself, and nothing
can live on it.
Men live on the earth, which is going round itself all the time. Then the earth gives us lives, food,
water and so on. We must get on well with it.
1. The sun is the b_____ of the three.
2. The e_____ is bigger than the moon, but s____than the sun.
3. The m_____ goes round the earth.
4. We can see the moon in the n _____.
5. Men must get on w_____ with the earth.
moon in the night.
The sun is much bigger than the earth, and the earth is bigger than the moon. So the sun is the biggest
and the moon is the smallest. The earth goes round the sun day and night. It goes at 30 kilometers a second.
The moon is our satellite (卫星). It is also our neighbor. It goes round the earth all the time. The moon
goes at 8 kilometers a second. The moon can't give out light or heat itself, and nothing can live on it.
Men live on the earth. It is going round itself all the time. The earth gives us lives, food, water and so on.
We must get on well with it.
根据短文内容，补全下面句子（每空一词）。
1. The sun is the b______of the three.
2. The e______ is bigger than the moon, but s______than the sun.
3. The m______ goes round the earth.
4. We can see the moon in the n______.
5. Men must get on w______ with the earth
The sun is a huge, hot, bright star. It is important because without it there would be no life on Earth. The
sun gives us light and heat.
All living things need light and heat from the sun to live. Plants need light and heat to grow. They use the
light from the sun to make food. We cannot make our own food, but plants can. All the food we eat comes
from plants in a food chain (链) which starts with the sun. For example,
Animals need sunlight, too. Just like us, their food comes from a food chain which begins with the sun
and the plants.
sun→ leaf→ caterpillar (毛虫)→bird
sun→ seaweed (海藻)→small fish→ whale (鲸)
Sunlight means we can see during the day. If there was no sun, it would be dark all the time. Even when
the sky is cloudy, the sunlight is very strong and it shines through the clouds.
B. Hot.
C. Bright.
D. All above.
B. Heat and eggs.
C. Corn and light.
D. Wheat and bread.
B. Because the sun can't give us light all day long.
C. Because the sunlight can shine through the clouds.
D. Because we can't see at night.
B. a food chain; sun
C. food; sun
D. plants; star
B. It can make rivers too dry.
C. Without it there would be no life on Earth.
D. Hot sun on dry land can cause fires.
Light and shadow（影子）are friends．They usually go together．We receive light every day．At the same time, we produce shadow．
Light cannot shine through you．Your body stops it from passing．There is a dark spot（斑点）on the ground next to you．The light cannot reach the dark spot．This is your shadow．
At noon the sun shines over your head．Your body stops very little light reaching the ground．So your shadow is quite short．
But in early morning or late afternoon the sun is low in the sky． Its light moves over more of your body．Then your shadow is quite long．Your body keeps a lot of light from reaching the ground．
We love light, especially（尤其）sunlight．Without sunlight, life on earth is impossible．Most of us like to stand in the shadow of a tree in summer．But some people are afraid of their own shadow at night．They do not want to walk in a dark street．They do not want to see the shadow, either．But still light and shadow usually go together．
1．The sentence “Light and shadow are friends” means ________．
A．the shadow produce light
B．the light usually follows the shadow
C．they usually get on well with each other
D．when we get light, we can get shadow． They are always together
2．Light cannot shine through you because ________．
A．it is too weak
B．your body stops it from traveling on
C．your body is tall and strong
D．there is a dark spot on the ground next to you
3．Your body's shadow is long because ________．
A．the sun is low in the sky in the morning or late afternoon
B．the sun is over your head
C．your body stops very little light reaching the ground
D．the sunlight is very strong at noon
4．It is ________ in the shadow of a tree in summer, so many people like to stay there．
A．hot B．warm C．cool D．cold
5．Which of the following is NOT true?
A．There will be no shadow without light．
B．Shadow is produced when something stops the light from passing．
C．We produce light when we receive it．
D．Many animals and plants have to live on sunlight．
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