A recent survey of 2000 parents in Britain showed that they are often afraid of science questions asked by their curious children only because they have no idea what the answer is. Here is a list of some simple questions that you can ask your parents to see if they know the answers.

    Q: Why is the sky blue?

    A: You probably know white sunlight is made up of seven colors. While it moves in a straight line when going through space, it starts to divide as it hits “raised area” in the atmosphere. The ones with longest wavelengths pass through easily. The blue , however , can be taken in by the gas molecules (分子) because it has a shorter wavelength , which in turn scatters (使分散) it in different directions. That’s why when you look up at the sky, it appears to be blue.

    Q:Why does the moon sometimes appear during the daytime?

    A: The simple answer to that is because just like any other object it is being lit by the sun. As long as it is around 45 degrees or even 90 degrees off the sun, it will receive light and be able to be seen. The only time it is not able to be seen during its 28-day orbit (轨道) around the earth is when it is right between the earth and the sun. That’s because its back , which is not lit by the sun, is facing us.

    Q: Where do birds/ honeybees go in winter?

    A: While the bird part is quite easy, since a lot of them get together and travel, the honeybee part is likely to puzzle your parents. It turns out that these busy insects stop being that active when the temperature drops below 50°F. Instead ,they get together in the lower central area of the hive （蜂巢）and form a ball around their queen. This helps keep both warm enough to survive the cold winter months.

1.The sky looks blue mainly because the color blue in the sunlight_______.

A. has the longest wavelength among all the colors

B. cannot be taken in by the gas molecules

C. doesn’t hit “raised area” in the atmosphere

D. cannot pass through space successfully

2.How long can’t the moon be seen during the daytime in a month?

A. 2                             B. 28                           C.30                                      D. 31

3.What do honeybees choose to do when the temperature drops below 50°F?

A. They choose to be active in the wild.

B. They choose to keep themselves warm.

C. They choose to travel to a warm place.

D. They choose to get together in the upper central area of the hive.

4.What is NOT explained in the passage?

A. Why is the sky blue?

B. Why is the moon able to be seen during the daytime?

C. Why do birds travel in winter?

D. Where do honeybees go in winter?

Reading Comprehension

　　A magnet has an attractive force on magnetic substances placed near it. The force is greatest at the poles of the magnet. The force is in the magnet itself. The force is also felt outside the magnet. The region around the magnet in which the magnetic force can be felt by a magnetic substance is called the magnetic field of the magnet. You cannot see a magnetic field but you can see what the force in a magnetic field can do.

　　When a bar magnet is hung freely, it comes to rest in a north-south direction. Another bar magnet hung in the same way, some distance away, will also come to rest in the same direction as the first magnet. The reason the bar magnets come to rest in a north-south direction is because of the Earth's magnetism. There is a very large magnetic field all around the Earth. The magnetic field seems to be produced by a huge magnet in the Earth, with its South Pole pointing towards the north and its North Pole pointing towards the south all the time.

　　The magnetic poles of the Earth are not at the same positions as the geographic poles. They are a short distance away from each other. The small angle between them is called the magnetic declination. The magnetic declination is different at different places on the Earth. It also changes slightly from year to yeas because of the changes in the Earth's magnetic field. Navigators must consider magnetic declination in their calculations.

1．When the magnetic needle of a compass is allowed to move freely, it will come to rest in line with the Earth's ________.

[　　]

2．In paragraph 1, magnet means any object that can ________ and attract small pieces of iron.

[　　]

A．produce a magnetic force

B．form a magnetic field

C．use a magnetic field

D．change magnetic substances

3．The geographic North Pole is ________ the magnetic north pole.

[　　]

A．at the same position of

B．different from

C．at the opposite position of

D．the same as

4．Magnetic compasses are used by travellers and navigators to ________ in which they are travelling.

[　　]

A．indicate the South Pole

B．indicate geographic poles

C．tell them the declination

D．tell them the direction

5．Which of the following statements is true?

[　　]

A．A magnet has an attractive force on every substance placed near it.

B．When a bar magnet is hung freely, it comes to rest in a north-south direction.

C．The magnetic poles of the Earth are at the same positions as the geographic poles.

D．The magnetic declination is same at different places on the Earth.

Passage 1

A  School  Report

1.After reading this, we know this is ________.

2.Which of the following is not mentioned in the form? ____.

3.Edward’s best subject is ________.

4.Edward is NOT so good at ________.

5.According to the form, which of the following sentences is true?

A  School  Report

1.After reading this, we know this is ________.

2.Which of the following is not mentioned in the form? ____.

3.Edward’s best subject is ________.

4.Edward is NOT so good at ________.

5.According to the form, which of the following sentences is true?