The atoms and molecules in gases<span> are much more spread out than in </span>solids<span> or liquids. They vibrate and move freely at high speeds. A </span>gas<span> will fill any container, but if the container is not sealed, the </span>gas<span> will escape. </span>Gas<span> can be compressed much more easily than a liquid or </span><span>solid</span>
#1 the relationship between universes and galaxies is that galaxies are made up of universe. and the relationship between stars and solar systems is every solar system contains at least one star.
#2. galaxies form after several planets form rather close to each other.
#3. the last one I don't know
Infrastructure refers to the underlying workings of a city, community, such as an electrical grid, sewer and road systems around a city. Infrastructure also refers to the to the facilities serving a particular city or country. Including facilities that contribute to the city or country's economical growth or economical function. They are services that can enhance the way of living, or living conditions of a community or city.