Which of the following is a clue of a chemical change? a. balls of wax form when melted wax is poured into ice water b. gas bubbles form in boiling water c. a gas forms when vinegar and baking soda are mixed d. iron changes color when heated

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.