Question

practice 5
describe the flow of energy from the core
of the sun to its surface. type your
answer in the box.

photosphere
convection
zone
radiation
zone
core
sunspots

Explanation:

1. Core: Energy is first generated in the Sun's core via nuclear fusion, where hydrogen fuses into helium, releasing high-energy photons (gamma rays and X-rays).
2. Radiation Zone: Energy travels outward through this dense zone via radiative transfer. Photons repeatedly absorb and re-emit energy, slowly moving toward the convection zone; this process can take hundreds of thousands of years.
3. Convection Zone: In this outer layer, energy moves via convection. Hot, energy-rich plasma rises to the surface, cools, and sinks back down to absorb more energy, creating circular convection currents.
4. Photosphere: The rising plasma releases its energy as visible light and other radiation from this layer, which is the Sun's visible surface that we observe.

Answer:

1. Energy is produced in the Sun's core through nuclear fusion of hydrogen into helium, generating high-energy photons.
2. These photons move outward through the radiation zone via radiative transfer, bouncing between particles over thousands of years.
3. In the convection zone, energy is carried upward by hot, rising plasma currents; the plasma cools near the surface and sinks back down to repeat the cycle.
4. Finally, energy is released as visible light and other radiation from the photosphere, the Sun's visible surface.