What layer of the atmosphere acts like a giant magnet? What does it attract?

izonoshere and it attracts UV sun rays

There are effects of magnetism and charged particles in the ionosphere, but that is well out of the atmosphere.

http://en.wikipedia.org/wiki/Aurora_(astronomy)

Magnetosphere

The layer of the atmosphere that acts like a giant magnet is called the ionosphere. However, it is important to note that it does not actually attract physical objects like a typical static magnet would. Instead, the ionosphere interacts with charged particles from the Sun and Earth, affecting their movement.

The ionosphere is located in the upper atmosphere and contains a high concentration of ions and free electrons. These charged particles are mainly created by solar radiation, particularly ultraviolet (UV) and X-ray radiation, which ionize the neutral atoms and molecules in the atmosphere.

The Sun constantly emits a stream of charged particles known as the solar wind. When these particles, primarily electrons and protons, interact with the Earth's magnetic field, they become trapped and guided by it. This process is known as magnetospheric convection.

The magnetosphere, a region shaped by Earth's magnetic field, extends far into space and interacts with the ionosphere. Together, they create the magnetosphere-ionosphere system. The ionosphere interacts with the magnetosphere, attracting and guiding the charged particles from the solar wind along Earth's magnetic field lines. These particles can then collide with the gases in the ionosphere, causing various phenomena such as the auroras (Northern and Southern Lights) and ionospheric storms.

So, while the ionosphere does not attract physical objects, it interacts with charged particles from the Sun and Earth, influencing their movement and contributing to fascinating phenomena in our atmosphere.