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Anonymous users2024-02-0815 According to the mantra water, gold, earth, and sea, you can know that Mercury is too far away and closer, and according to common sense, you know that Jupiter is the largest planet in the solar system, then you can know that Jupiter's volume is greater than that of Mercury, and there are two options left, whether the density is larger or the mass is larger, since Jupiter is the largest planet in the solar system, you can know that the density of Mercury should be greater than that of Jupiter, answer a
16 This is also based on the mantra, located between the orbits of Mars and Jupiter, and the answer is D
17 This uses the elimination method, it turns out that we have always thought that Pluto is a planet, and later identified it as a dwarf planet, then we know that Pluto must orbit the sun, and then look at the number of B satellites, not all planets have satellites, this is not necessarily related, C is not spherical and has nothing to do with whether it is a planet, and we know that Pluto is spherical exclusion, then the answer D remains.
18 Because the mass of the earth is moderate, the gravitational pull is moderate, forming a thick atmosphere; Due to the moderate distance between the sun and the earth, it affects the earth to have suitable temperature conditions, which are the basic conditions for the existence of life on the earth. Items b and d have nothing to do with the existence of life on earth, so item d is chosen.
19 undoubtedly chose the moon.
20 choose C, a Mars has an atmosphere, B planet cannot emit light on its own, can only reflect the sun's rays, D Pluto does not belong to the eight planets.
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Anonymous users2024-02-0715:a, density Earth first, Mercury second.
16:d17:d, the orbit overlaps with the orbit of Neptune.
18：a19：d
20：c
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Anonymous users2024-02-06, Mercury is the smallest and lightest of the eight planets and at the same time the closest planet to the Sun, with a density of grams of cubic centimeters. Jupiter is the most massive of the eight planets and is also a gaseous planet. So the answer is a.
The asteroid belt is located between Mars and Jupiter.
Reasons why Pluto was downgraded to a dwarf planet in 2006:
1. Although its own gravity can make itself spherical, its mass is smaller than that of the Moon, and it revolves with its own moon Charon, and the gravitational point is beyond Pluto.
2. Failed to clear other celestial bodies in orbit, and the orbit penetrated the inner side of Neptune.
The distance between the sun and the earth is moderate, so that the average temperature of the earth's surface is about 15 degrees Celsius, which is suitable for the survival and development of life.
It's easier to get an answer to this one, so I won't explain it.
Eight planets: water, metal, earth, fire, wood, earth, king, king, and sea king. Three commonalities: coplanarity, near-circularity, and isotropy (revolution). It cannot emit light by itself, but can only reflect the sun's rays.
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Anonymous users2024-02-051. Qinghai-Tibet; Lack of oxygen in the cold.
2. Huai River; Qinling;
3. Yellow River; The mountain does filial piety.
4. Wen Chun's manuscript has a monsoon climate, rain and heat at the same time.
5. Beijing-Kowloon Line; d
Give a good review.
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Anonymous users2024-02-04a Northern half.
Ball Western Hemisphere b Northern Hemisphere Western Hemisphere c Northern Hemisphere Western Hemisphere d Southern Hemisphere Eastern Hemisphere.
The degree change in east longitude and west longitude is.
Specifically based on Greenwich 0 degrees, respectively, to the east and west. ab two points, 60 50 40 30 20, make up the rest, should be west longitude 60 west longitude 50 west longitude 40 west longitude 30 west longitude 20 west longitude 10 0, from which it is judged to be west longitude, the western hemisphere. The northern and southern hemispheres are 0 at the equator and increase in the north-south direction.
50 40 30 20, after completion: 50 north latitude 40 north latitude 30 north latitude 20 north latitude 10 0, judged to be north latitude, northern hemisphere. cd two points, 60 30 30 60, complete :
Latitude 60 north latitude 30 0 south latitude 30 south latitude 60, judged to be both the northern and southern hemispheres. 50 30 10 10 30, complete: 50 west longitude 30 west longitude 10 0 east longitude 10 east longitude 30 east longitude, judged to be both the eastern and western hemispheres.
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Anonymous users2024-02-0315:B, the tip of the V-shaped contour line points to the elevation of the valley.
16:b, not explained.
17:D, Asia is a developing country except Japan, so item A is wrong, Asia has a large undulating terrain and complex topography, item B is wrong, the natural population growth rate should be the highest in Africa or Latin America, and C is wrong.
18:c, the Mediterranean climate is characterized by hot and dry summers and mild and rainy winters, which are controlled by the subtropical high pressure belt in summer and the prevailing westerly wind belt in winter.
It's OK to remember it in the book.
n=6 option d The mass of the matter will increase when the pressure increases, so n+2>4+3
。Recommended for you.。。 Now that we're in the third year of junior high school, it's time to start doing more practice. >>>More
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