8.6 Temperatures on Terrestrial Planets Eghteen/ Patterns in the Sohar System 31

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8.6 Temperatures on Terrestrial Planets Eghteen/ Patterns in the Sohar System 31 The surface temperature of a planet is mainly influenced by three factors: the nature of its surface, the composition and thickness of its atmosphere, and its distance from the Sun. In the following activity, you will use a laboratory setup similar to what is shown in FIGURE 18.3. This experiment will help you determine how distance from the Sun affects a planet's surface temperature FIGURE 18.3 Temperatures tert on terrestrial planets lab equipment setup. ACTIVITY 18.6 Distance Versus Temperature Complete the following steps using the laboratory equipment supplied by your instructor TABLE 18.3 Temperature Data STARTING 10-MINUTE DISTANCE FROM LIGHT SOURCE (cTEMPERATURE CTEMPERATURE Step 1: Work in groups of four students. Have each group member obtain identical light (heat) sources and identical black containers with cov ers and thermometers. Conduct four experiments simultaneously, one by each member of the group. Do one experi ment with the covered can and thermometer 15 cm from the light source, another with the can 30 cm from the light source, the third 45 cm, and the fourth 60 cm. Step 2: 60 Record the starting temperature for each con- tainer on TABLE 18.3; the temperatures should all be the same Step 3: 500 46 Step 4: For each of the four setups, turn on the light. 400 12° After 10 minutes, record the temperature of 40 the container in Table 18.3. 300 Plot the temperatures from Table 18.3 on the graph in FIGURE 18.4, using the temperatures Step 5: on the left side of the graph. Connect the points and label the line you constructed Temperature change with distance 32 100 30° 1. Briefly relate the temperature of an object to its dis- tance from a heat source, based on the experiment you performed. 0° 26° 100 20° 30 45 60 Distance (cm) 15 2. Refer to the "Mean Temperature" column in Table 18.1. Plot the mean temperatures of the terrestrial planets at their appropriate distances from the Sun on the graph in Figure 18.4. Use a scale of 40 cm AU and the temperature scale on the right axis of the graph. Label each point with the planet's name.Connect the points and label the line "Mean terrestrial planet temperatures." s FIGURE 18.4 Temperatures on terrestrial planets graph. istances from the Sun contiriue

Explanation / Answer

2. There are total eight planets . First four planets are called as terrestrial planets and the other four are called Jovian planets.terrestrial planets are small and made up of rocks and Jovian planets are big and made up of gases . They are seperated by asteroid belts .

3. Terrestrial planets are spaced closer when compared to that of the Jovian planets .

4.if we create a model this would be an approximate spacing between planets

mercury: 1 step from sun

Venus : 2 steps

Earth : 2.5

Mars : 4

Asteroid belt : 8

Jupiter: 13

Saturn : 24

Uranus : 49

Neptune : 76

5. Neptune

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