That is, if you observe the spectrum of a star and can determine the wavelength where the emission peaks (Î»max), you can calculate that starâs temperature. Here is another copy of the plot that we studied in Lesson 3: Figure 4.1: Two-dimensional plot of the spectrum of a blackbody with different temperatures.
Igneous rocks usually contain the most crystals. The longer it takes the magma to cool, the larger the crystals.
Students need to be aware that igneous rock forms when magma cools and forms crystals. They should know from examining rock samples and / or photographs that igneous rock such as granite contains crystals and that different types of igneous rock contain crystals of different sizes.