What does it mean that a hypothesis must be ‘falsifiable’ in order to be valid? A. It must have the ability to be proven wrong by some test.
B. It must be wrong the first time, or you did not learn anything.
C. It cannot be wrong, or the experiment would be pointless.
D. It must conform to experimental standards.

Your roll: experienced electron speech is adressed to: a new "freshman class" of electrons job: write a speech task: you are to pretend that you are giving a speech to a new group of electrons. be sure to mention their placement in an atom, their charge, and their role in chemical bonding (ionic and covalent) be specific!

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division