3. As these materials began to gravitationally pull together and form larger objects they became planetary seeds or protoplanets. About how far from the Sun would be the closest distance that any of the materials from question 2 could condense (see Table 4.4 and Graph 4.1)? + This distance from the Sun is called the rock-metal condensation line. 4. Can any of the materials in Table 4.3 condense inside (closer to the Sun than) the rock-metal condensa- - tion line? Therefore, can planets form inside this line? 5. About how far from the sun would you expect temperatures to cool down as low as 150 K or less (see Table 4.4 and Graph 4.1)? This distance from the Sun is called the frost line. 6. What materials in Table 4.3 could then condense (become solid) on the already formed protoplanets beyond the frost line, creating a second layer of material on these objects? What common name do we give to these materials when they condense on something (remember, they are beyond the frost-line)? Se

3. As these materials began to gravitationally pull together and form larger objects they became planetary seeds or protoplanets. About how far from the Sun would be the closest distance that any of the materials from question 2 could condense (sec Table 4.4 and Graph 4.1)? This distance from the Sun is called the rock-metal condensation line. 4. Can any of the materials in Table 4.3 condense inside (closer to the Sun than) the rock-metal condensation line? Therefore, can planets form inside this line? 5. About how far from the sun would you expect temperatures to cool down as low as 150K or less (see Table 4.4 and Graph 4.1)? This distance from the Sun is called the frost line. 6. What materials in Table 4.3 could then condense (become solid) on the already formed protoplanets beyond the frost line, creating a second layer of material on these objects? What common name do we give to these materials when they condense on something (remember, they are beyond the frost-line)