2. Why can we see the illuminated side at Full Moon? A. Because that side is towards both the Sun and the Earth. Q. How often do we have New and Full Moon? A. Once every 29 days. Q. Does the Moon rise at the same time every evening? Q. What can be seen on the Moon? A. Mountains, Plains, and Valleys. Q. How would the Earth appear to a person at the Moon? A. It would appear as the Moon does to us, only larger, and immovable. LESSON XX. TIDES. Q. What is Tide ? A. The rising and falling of the water. Q. What causes Tide? A. The attraction of the Sun and Moon. Q. Which has the greater influence on the water? A. The Moon has about three times as much,induence on the water as the Sun has. Q. Why? A. Because the Moon is much nearer the Earth. Q. How are Tides divided with respect to the rising and falling of the water? A. Into Flood and Ebb. Q. When is it Flood Tide? A. When the water is rising. Q. When is it High Water? A. When the water has risen. Q. When is it Ebb Tide? 4. When the water is falling. Q. What parts of the Earth have the same tides at the same time? A. Any two opposite sides. Q. What part of the Earth has high water at the same time with the east side of America? A. The east side of Asia; it being on the opposite side of the Earth. Q. If the Earth did not turn on its axis, what would be the effect? A. The highest water would continually be on the side towards the Moon, and the side opposite to it. LESSON XXI. Q. How long is the tide in rising? A. About 6 hours. Q. How long is the tide in falling? A. About 6 hours. Q. How often do we have high and low water? Q. Is it high water at the same time each day? A. It is high water about 50 minutes later each day. Q. How are tides divided with respect to the extent of the rise and fail of the water? A. Into Spring and Neap. Q. What is Spring Tide? A. The greatest Flood and Ebb Tide. Q. When do Spring Tides occur? A. When the Sun and Moon act together. Q. What is Neap Tide? A. It is the least rise and fall of the water. Q. How often do Spring and Neap Tides occur? Q. Does the water always rise to the same height? 4. It does not; during Spring Tides the high water is higher than usual, and the low water lower than usual. NOTE. The above table is arranged from "Hind's Solar System," which contains accounts of the most recent discoveries. LESSON XXIII. Q. How many motions has a Primary Planet? A. Two; one on its axis, and another around the Sun. Q. How many motions has a Secondary Planet? A. Three; 1st, on its axis; 2d, around its Primary; 3d, with its Primary around the Sun. Q. How are the Planets divided with respect to their distance from the Sun ? A. Into Inferior and Superior. Q. Which are the Inferior Planets? A. Mercury and Venus; their distance from the Sun being less than that of the Earth. Q. Which are the Superior Planets ? A. Mars, Jupiter, Saturn, Uranus, and Neptune, their distance from the Sun being greater than that of the Earth. Q. What Planets have Moons? A. The Earth has 1, Jupiter 4, Saturn 8, Uranus 6, Neptune 2. & LESSON XXIV. Q. Which is the smallest Primary Planet, except the Asteroids? A. Mercury is the smallest and nearest the Sun. Q. What of the size of Mercury? A. It is one-seventeenth of the size of the Earth. Q. What of the light and heat of Mercury? A. It has seven times as much light and heat as the Earth. Q. Why has Mercury more light and heat than the Earth? A. Because it is much nearer the Sun. Q. What is the second Planet from the Sun ? Q. Where and when is Venus seen? A. In the east before sunrise, or in the west sunset. * Q. What is Venus called when seen before sunrise? Q. What is Venus called when seen after sunset ? Q. What is the third Planet from the Sun? A. The Earth. Q. What is the fourth Planet from the Sun ? Q. How is Mars known? A. By its red, fiery color. LESSON XXV. Q. Which is the largest Planet in the Solar System? A. Jupiter. Q. What can you say of its size? A. Jupiter is more than twelve hundred times as large as the Earth. Q. How many Moons has Jupiter? A. Four. Q. Which Planet is next in size to Jupiter? A. Saturn. Q. What can you say of its size? A. Saturn is one thousand times as large as the Earth. Q. How many Moons has Saturn? A. Eight. |