Topic content:
Scientists measured the length of different longitude and latitude lines of the earth, and the statistical results are shown in the table below. Answer 1-2 questions.
Latitude of the survey site
(Unit: degree)
Length of longitude 1 °
(Unit: km)
Length at 1 ° latitude
(Unit: km)
zero
111.322
110.569
thirty
96.490
110.850
forty-five
78.850
111.132
eighty
19.394
111.666
Subtitle 1: The following is the analysis of the measurement results. The correct one is ()
A. Both longitude and latitude lines grow with the increase of latitude
B. The length of latitude line becomes longer and the length of longitude line becomes shorter with the increase of latitude
C. The change of weft length with latitude is caused by measurement error
D. The change of longitude length reflects the irregularity of the earth's shape [Subtitle 2: The following figure shows the first image of the lunar polar region sent back from the moon by Chang'e-1 satellite, which was taken by a 3-orbit CCD stereo camera mounted on the satellite.
Assuming that the longitude and latitude network on the moon is similar to that on the earth, the shadow in the following four figures can best represent the position of the polar image in the figure is ()
Best answer:
Subtopic 1: D
Subtitle 2: A
Answer analysis:
slightly
Test core:
Globe: people imitate the shape of the earth and reduce it in a certain proportion to make a model of the earth - the globe.
(1) The earth axis - the imaginary axis of the earth's rotation (2) The poles - the earth axis passes through the earth's center and intersects the earth's surface at two points. The point pointing to the North Star is called the North Pole; The opposite of the North Pole is called the South Pole.
(3) Equator - a large circle on a globe that is equidistant from the north and south poles.
Longitude and latitude lines: Longitude and latitude lines are drawn on the globe and map in order to determine the position and direction on the earth. There is no longitude and latitude line on the ground. The line connecting the north and south poles is called longitude. The line perpendicular to the longitude is called the weft line. A weft line is a circle of unequal lengths. The longest latitude line is the equator. Because longitude indicates the north-south direction, it is also called meridian. According to international regulations, the longitude passing through the original site of the British Greenwich Observatory is called the 0 ° longitude, also called the prime meridian. On the earth, the longitude indicates the north-south direction, and the latitude indicates the east-west direction.
(1) Latitudinal line: a circle circling the earth in the east-west direction.
(2) A line connecting the north and south poles and perpendicular to the latitude line.