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人教版选修九Unit2 Sailing the ocean 阅读

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Book9 Unit2 Sailing the ocean
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Comprehension questions
1.What is the main topic of this passage?
A.The voyages of the travelers before the 17th century
B.How to plot a ship’s position on a map
C.How did ancient men navigate so well
e nature to aid navigation
2.Ancient navigators used navigational instruments to help them _______.
A.find celestial bodies
B. predict the weather
C. explore the sea
D. find latitude
3.The author of the passage implies that the ancient navigators were ______.
A.Hard-working
B. brave
C. intelligent
D. energetic
4.According to the passage, _______.
A.The ancient accomplished navigators were able to use South Star to plot their positions
B.Sea birds could be used to show the way to land when it was nowhere to be seen
C.Wise seamen used the snows to direct their sailing
D.The sextant proved to be the most accurate and reliable of these early navigational
instruments.
True or False?
1).An early method of calculating longitude was to use a knotted rope tied to a log.
2).The astrolabe was the first instrument to measure the sun’s position.
3).The quadrant was more precise and simplified than the astrolabe, but still had its shortcoming.
4).Up to now, the most accurate and reliable navigational instrument is the sextant.
5) The astrolabe, quadrant and sextant are different kinds of navigational instruments and they have nothing to do with each other.
Read the passage and answer the following questions (见课文P14 Ex1)
1 _______ _______
2_____________________________________________________________ ______________________________________________________________ _______________________________________ .
3.___________________________________________________________________________________________________________________________ _____________________________
Using nature （见课文P14 Ex4）
1. To find the ship’s position at sea a sailor used ____________________.
2. A sailor knew that land was nearby if he saw _____________________________________________________________.
3. Sailors used ________________________________________________. Using instruments
4. These were two methods to find longitude:
1)._________________ 2) ________________________________
5. Write down the working principles of the following instruments:
Bearing circle: ____________________________________. Astrolabe: ___________________________________________________. Quadrant:______________________________________________________ ___________________________________________________________ Sextant:________________________________________________________ ______________________________________________________________ _________________________________________________________.。

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人教版高中英语精品课件 选修九 Unit2 Sailing the oceans-Textbook

人教版高中英语精品课件 选修九 Unit2 Sailing the oceans-Textbook


2 Which do you think was easier to work out: latitude or longitude? Latitude, because it was used to measure how far you had travelled from land on a straight line. It was discovered a long time before longitude.
3 Why is the position of the sun and various stars useful for working out latitude? The position of the sun and stars are useful for working out latitude because they are fixed points in the sky and their movements in relation to the earth are already known. So they can be used to measure a ship's position.
2 Why are speed and time important in working out the longitude of a ship? Speed and time are important in finding out the longitude of a ship because the earth moves fifteen degrees westwards every hour. If you know your direction, speed and time, you can work out the approximate longitude or change in your position in relation to the stars.
高中英语 Unit2Sailing the oceans-Listening课件 新人教选修9

高中英语 Unit2Sailing the oceans-Listening课件 新人教选修9

WM: I see! So what did they do? DS: Well, one of the things they did
was concentrate on watching
birds. There's the story of a Viking called Raven-Floki. He used to keep birds on his ships but he didn't feed them. Then when he thought land was near he'd let the birds go and if they flew straight to land, all he had to do was to follow them!
Exercise 4
1.The Emperor wanted to demonstrate Chinese power abroad so _h_e__se_n_t__Z_h_e_n_g__H_e__w_i_th__a_l_a_r_g_e_f_le_e_t_o_f__ _s_h_i_p_s_t_o_v_i_s_it_n_e_w__p_l_a_c_e_s_in__n_e_i_g_h_b_o_u_r_in_g _c_o_u_n_t_r_ie_s_._
Listening
1. Read these words and then listen to the tape. Circle those aids that early sailors used to find their way.
compass stars currents birds
maps fish movements
DS: Of course. At first if there was no land nearby the seamen used the sky to find their way. They looked
最新人教版高中英语选修九精品课件：精品课件： Unit2Sailing the oceans-Textbook

最新人教版高中英语选修九精品课件：精品课件： Unit2Sailing the oceans-Textbook


2019/8/6
10
2 What problems would you anticipate for this journey?
I would anticipate very hot weather (around the equator), cold weather (around the Cape of Good Hope), very stormy seas (around the Cape), and problems with food and water (unless helped by local natives the water may be contaminated and the food scarce), etc.
2019/8/6
2
Explorer
land
use of compass and
landmarks
find new places within an
already identified island or continent
Explorer is someone who travels into or through a place in order to learn about it.
4 Which ones do you think are still used today? Sea charts are still used today.
2019/8/6
6
Comprehending
1 Read the passage and answer the following
questions.
Navigator sea nautical instruments
高中英语 Unit2Sailing the oceans-Textbook课件 新人教选修9

高中英语 Unit2Sailing the oceans-Textbook课件 新人教选修9


Explorer
land use of compass and
landmarks find new places within an
already identified island or continent
Explorer is someone who travels into or through a place in order to learn about it.
2 Which do you think was easier to work out: latitude or longitude?
Latitude, because it was used to measure how far you had travelled from land on a straight line. It was discovered a long time before longitude.
1 _m_e_a_s_u_r_in_g__ti_m_e__a_n_d_s_p_e_e_d____
2 _c_o_m_p_a_s_s_a_n_d__c_o_m_p_l_ic_a_t_e_d__ __m_a_t_h_em__a_ti_c_a_l_ta_b_l_e_s___ .
5 Write down the working principles of the following instruments:
4 Read the passage again and use the information to analyse the navigational skills. Write the answers in your own words. Using nature
1 To find the ship's position at sea a sailor used the North Star and the sun.