1. How have astronomers formed their ideas about the layers of the sun?(1 point)

Responses

observing all the layers during total solar eclipses
observing all the layers during total solar eclipses

using theoretical models combined with known data
using theoretical models combined with known data

making direct observations of the sun's layers
making direct observations of the sun's layers

developing mathematical models based only on known data

2. Two astronomers are viewing temperature data from each of the sun's layers, but the layers aren't identified. Describe one way the scientists can use temperature to identify which layer they are studying.(1 point)
Responses

The lowest temperatures are from the photosphere.
The lowest temperatures are from the photosphere.

The lowest temperatures are from the core.
The lowest temperatures are from the core.

The highest temperatures are from the radiative zone.
The highest temperatures are from the radiative zone.

The highest temperatures are from the corona.

3.Which is the origin of the sun’s energy?(1 point)
Responses

solar flares
solar flares

burning hydrogen
burning hydrogen

nuclear fusion
nuclear fusion

charged particles
4 .
Which of the following protects Earth's atmosphere from solar wind?(1 point)
Responses

convection currents
convection currents

hydrogen atoms
hydrogen atoms

radiative zone
radiative zone

magnetosphere