6. What is a shock?

O when gas and dust are swept up violently
O when gas and dust are swept up carefully
O when asteroids are swept up violently
O when gas and dust are loose in space

A shock refers to the violent interaction between particles, such as gas and dust, in space. It occurs when these particles are swept up forcefully or collide with each other due to strong forces or disturbances in the surrounding environment.

A shock is when gas and dust are swept up violently.

To answer this question, we need to understand what a shock is in the context given. Based on the provided options, a shock occurs when gas and dust are swept up violently.

To find the answer, you should carefully read and analyze each option. From the provided options, only the first option mentions that a shock occurs when gas and dust are swept up violently.

Therefore, the correct answer is:

- A shock occurs when gas and dust are swept up violently.