Question

understand main ideas

1. mainidea identify which features of the sun are typical of stars.
2. describe the outer layers of gas above the sun’s visible surface.
3. classify the different types of spectra by how they are created.
4. describe the process of fusion in the sun.
5. compare the composition of the sun in figure 8 to the gas giant planet compositions.

think critically

1. infer how the sun would affect earth if earth did not have a magnetic field.
2. relate the solar activity cycle with solar flares and prominences.

writing in earth science

1. create a trifold brochure relating the layers and characteristics of the sun.

Explanation:

1. Stars like the Sun are massive, luminous spheres of plasma held together by gravity. Features typical of stars in the Sun include nuclear - fusion in the core, which releases energy in the form of light and heat.
2. The outer layers of gas above the Sun's visible surface are the chromosphere and the corona. The chromosphere is a thin layer just above the photosphere, and the corona is the outermost layer, which is extremely hot and extends far into space.
3. Spectra can be classified as emission spectra (produced when atoms emit light as electrons transition from higher to lower energy levels), absorption spectra (produced when light passes through a gas and certain wavelengths are absorbed), and continuous spectra (produced by hot, dense objects like the Sun's photosphere).
4. In the Sun, hydrogen nuclei (protons) fuse to form helium nuclei through a series of steps known as the proton - proton chain reaction. This releases a large amount of energy in the form of gamma rays, neutrinos, and kinetic energy of the resulting particles.
5. The Sun is mainly composed of hydrogen and helium, similar to gas - giant planets like Jupiter and Saturn. However, the Sun has a much higher proportion of hydrogen and helium in its core due to nuclear fusion, while gas - giant planets have a more complex mixture of ices and other compounds in addition to hydrogen and helium in their interiors.
6. Without Earth's magnetic field, the Sun's solar wind (a stream of charged particles) would strip away Earth's atmosphere, exposing the surface to harmful radiation. It could also cause widespread electrical disruptions on Earth.
7. The solar activity cycle is an 11 - year cycle of solar activity. Solar flares and prominences are more common during periods of high solar activity. Solar flares are sudden releases of energy in the Sun's atmosphere, and prominences are large, bright, gaseous features that extend from the Sun's surface.
8. For the trifold brochure, one panel could describe the inner layers (core, radiative zone, convective zone), another panel could focus on the visible surface (photosphere) and the outer layers (chromosphere, corona), and the third panel could include information about solar activity like flares and prominences.

Answer:

1. Massive, luminous sphere of plasma with nuclear - fusion in the core.
2. Chromosphere and corona.
3. Emission, absorption, and continuous spectra.
4. Hydrogen nuclei fuse to form helium through the proton - proton chain reaction.
5. Similar in having hydrogen and helium, but Sun has higher proportion in core due to fusion and gas - giants have more complex mixtures.
6. Strip away atmosphere and cause electrical disruptions.
7. More common during high solar activity periods.
8. Inner layers, visible and outer layers, solar activity on each panel respectively.