Because of Saturn's rings, what are we unable to observe from Earth? Its bright blue color
Its solid core
Its well defined shaped
Its lack of moons

Its well defined shaped

Explanation:

Due to Saturn's rings, we are unable to observe from earth the well defined shape.

Saturn is made up of pieces of comets and asteroids under the pull of the Saturn's gravity.

This ring is not transparent and very opaque. It obstructs the view of the planet's surface. Thereby making it difficult to see the shape of the planet.

Answer feldspar,quartz,mica and amphibole;

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.