英文自然题.有点多.望各位高手 大虾回答!1.Why is it difficult to see very far ahead in a fog? 2.Why can you see your breath on a cold day? 3.Why does fog often appear late at night? 4.What is the difference between fog and clouds? 5

英文自然题.有点多.望各位高手 大虾回答!1.Why is it difficult to see very far ahead in a fog? 2.Why can you see your breath on a cold day? 3.Why does fog often appear late at night? 4.What is the difference between fog and clouds? 5
英文自然题.有点多.望各位高手 大虾回答!
1.Why is it difficult to see very far ahead in a fog? 2.Why can you see your breath on a cold day? 3.Why does fog often appear late at night? 4.What is the difference between fog and clouds? 5.How is log dangerous to people? 6.What is the use of rain ?List as many usages you can? 7.Can rain be harmful to us? 8.Why are most rainbows we see only half circles? In what circumstances is it possible for us to see the full circle of a rainbow? 9.Why can't rainbow appear directly overhead? 10.Why do we make artificial rainfalls?How to make it? 11.Snow is formed at temperatures near to or below 0度 T or F 12.Some snowflakes have six sides, others have five or less T or F 13.Snowfall can be measured in terms of the depth of snow or the depth of melted water T or F 14.Snow is water in solid state T or F 15.50mm deep of snow contains as much water as 50mm deep of rain Tor F

英文自然题.有点多.望各位高手 大虾回答!1.Why is it difficult to see very far ahead in a fog? 2.Why can you see your breath on a cold day? 3.Why does fog often appear late at night? 4.What is the difference between fog and clouds? 5
1.Why is it difficult to see very far ahead in a fog?
Fog is condensed moist that floating in the air.They would block the vision of human body.
2.Why can you see your breath on a cold day?
the moisture in your breath condensed in cold air.
3.Why does fog often appear late at night?
temperature drop during the night,when it reaches the dew point,it might have fog if air is full of moisture.
4.What is the difference between fog and clouds?
same,fog is closer to the ground.Cloud is up high in the air.
5.How is log dangerous to people?
log?if it is fog
It might cause traffic accidents.
6.What is the use of rain List as many usages you can?
it circulates water on earth.
7.Can rain be harmful to us?
too much rain will cause flood.
8.Why are most rainbows we see only half circles?In what circumstances is it possible for us to see the full circle of a rainbow?
the other half is on earth.
if you were on a cliff and looking down.you might get a chance to view a full circle of rainbow.
9.Why can't rainbow appear directly overhead?
because it is a reflection from the sun that behind you.It will not appear on top of you head.
10.Why do we make artificial rainfalls?How to make it?
to improve the drought situation.
use chemicals,saw dust,salt,etc.
11.Snow is formed at temperatures near to or below 0度 T or F
below breezing point.
12.Some snowflakes have six sides,others have five or less T or F
check it by yourself on the Google images,
search for "snow flakes".
most of them have six sides
some of them have more.
13.Snowfall can be measured in terms of the depth of snow or the depth of melted water T or F
10 inches of snow equals to one inch of rain.
14.Snow is water in solid state T or F 15.50mm deep of snow contains as much water as 50mm deep of rain Tor F
Snow is water in solid state.however,10 inches of snow equals to one inch of rain..

我学过的：
1.Why is it difficult to see very far ahead in a fog?
Fog is condensed moist that floating in the air. They would block the vision of human body.
2.Why can you see your breath on a...

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我学过的：
1.Why is it difficult to see very far ahead in a fog?
Fog is condensed moist that floating in the air. They would block the vision of human body.
2.Why can you see your breath on a cold day?
the moisture in your breath condensed in cold air.
3.Why does fog often appear late at night?
temperature drop during the night, when it reaches the dew point, it might have fog if air is full of moisture.
4.What is the difference between fog and clouds?
same, fog is closer to the ground. Cloud is up high in the air.
5.How is log dangerous to people?
log? if it is fog
It might cause traffic accidents.
6.What is the use of rain ?List as many usages you can?
it circulates water on earth.
7.Can rain be harmful to us?
too much rain will cause flood.
8.Why are most rainbows we see only half circles? In what circumstances is it possible for us to see the full circle of a rainbow?
the other half is on earth.
if you were on a cliff and looking down. you might get a chance to view a full circle of rainbow.
9.Why can't rainbow appear directly overhead?
because it is a reflection from the sun that behind you. It will not appear on top of you head.
10.Why do we make artificial rainfalls?How to make it?
to improve the drought situation.
use chemicals, saw dust, salt, etc.
11.Snow is formed at temperatures near to or below 0度 T or F
below breezing point.
12.Some snowflakes have six sides, others have five or less T or F
check it by yourself on the Google images,
search for "snow flakes".
most of them have six sides
some of them have more.
13.Snowfall can be measured in terms of the depth of snow or the depth of melted water T or F
10 inches of snow equals to one inch of rain.
14.Snow is water in solid state T or F 15.50mm deep of snow contains as much water as 50mm deep of rain Tor F
Snow is water in solid state. however, 10 inches of snow equals to one inch of rain..

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