Ta
fill in the blanks to complete these sentences about rock characteristics.
a rock is an
of minerals.
the of a rock is a result of its mineral composition.
most rocks contain more than one type of

9. the history of life on earth is recorded in

What is the difference between a meteoroid and a meteor?

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos