Glencoe Science: Astronomy, Lesson Plans Block with Scheduling
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I-01-LBJ-861761 08/16/2004 1:43 PM Page i (tl)NASA/Science Photo Library/Photo Researchers, (tr)Billy & Sally Fletcher/Tom Stack & Assoc., (b)Photodisc i-01-LBJ-861761 08/16/2004 1:43 PM Page ii Astronomy This collection of images is of Jupiter, Io (one of its moons), Mars, and the Andromeda Galaxy. The Andromeda Galaxy is the most distant object visible to the human eye. At a distance of 2.2 million light years, it appears as a fuzzy patch of light in the night sky. Copyright © 2005.
Planet and sent pictures back to Earth. Mariner 10 photographed only 45 percent of Mercury’s surface, so scientists don’t know what the other 55 percent looks like. What they do know is that the surface of Mercury has many craters and looks much like Earth’s Moon. It also has cliffs as high as 3 km on its surface. These cliffs might have formed at a time when Mercury shrank in diameter, as seen in Figure 4. Why would Mercury have shrunk? Mariner 10 detected a weak magnetic field around Mercury.
Your right eye closed, as the girl in Figure 3A is doing. Your thumb appears to change position with respect to the background. Now do the same experiment with your thumb closer to your face, as shown in Figure 3B. What do you observe? The nearer an object is to the observer, the greater its parallax is. Astronomers can measure the parallax of relatively close stars to determine their distances from Earth. Figure 4 shows how a close star’s position appears to change. Knowing the angle that the.
Clouds 247 Temperature (°F) ؉28 31 ** Type of precipitation Wind speed and direction Change in barometric pressure in last 3 h Total percentage of sky covered by clouds Type of low clouds 30 Dew point temperature (°F) Sample Plotted Report at Each Station Precipitation , Wind Speed and Direction Sky Coverage Fog 0 calm No cover Scattered cirrus Snow 1–2 knots 1/10 or less Dense cirrus in patches Rain 3–7 knots 2/10 to 3/10 Veil of cirrus covering entire sky Thunderstorm.
HANDBOOKS J ◆ 173 169-175-LBJ-RH-861761 08/16/2004 1:45 PM Page 174 Reference Handbooks Reference Handbooks PERIODIC TABLE OF THE ELEMENTS Gas Columns of elements are called groups. Elements in the same group have similar chemical properties. Liquid 1 1 Element Atomic number Hydrogen 1 2 H Lithium 3 2 Li Be 9.012 Sodium 11 Magnesium 12 Na Mg 22.990 24.305 Potassium 19 Calcium 20 3 4 5 1.008 The first three symbols tell you the state of matter of the element at.