Sanjay is learning about the elements that make up earth’s crust. ms. richards, his earth science teacher, gives him an element and asks him to determine which element from earth’s crust it is. she also provides sanjay with this table. sanjay weighs the element and finds that it has a mass of 17.98 g. by placing the element in water, he determines the volume of the substance to be 2.2835 ml. based on the table from ms. richards, what element from earth’s crust did ms. richards gave to sanjay?

chemical because it warmed up which involves temperature and it bubbled which includes changing

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organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.