& Classwork for Biology 8/9 2020 X E Marissa Quilen Mythbusters
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Unit 1 XL Skills
DE XL ldentify steps of the scient
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x. com/science/grade-/identify steps of the scientific
method
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The passage below describes some of the
steps of the scientific method. Select the
part of the passage that describes
revising the hypothesis.
Time
elapsed
00020
Hint: To revise the hypothesis, you use the
results of the investigation to come up
with a new explanation and to make new
predictions.
Challenge
Stage 2 of 3
Collect 4
tekens
an icy sidewalk
After a severe ice storm, Hansen wondered how he could melt ice on the
sidewalk. He
had heard that sand, when heated by the sun, could melt ice. So, Hansen got twenty
ice cubes that were equal in weight. He sprinkled sand on half the ice cubes and left
the other half unsanded. He placed all the cubes outside for one hour and then
brushed off the sand and reweighed them. Hansen calculated the average weight of
each type of cube to see if the sanded cubes melted more than the unsanded cubes.
He decided that sand did not speed up melting, since the two types of ice cubes were
similar weights. Then, he read that salt makes ice melt at a cooler temperature. He
predicted that because the melting temperature would be lowered, ice cubes would
melt faster if he applied salt to them.
XIX Practice with our app
Open
14:03

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

He did not infringe upon the policy making powers that he felt the constitution gave congress. but the determination of foreign policy became preponderantly a presidential concern. when the french revolution led to a major war between france and england, washington refused to accept entirely the recommendations of either his secretary of state thomas jefferson, who was pro-french, or his secretary of the treasury alexander hamilton, who was pro-british. rather, he insisted upon a neutral course until the united states could grow stronger. which provides the best objective summary of this excerpt? president washington made a good choice when he decided not to accept the recommendations of his advisors and instead insisted that the united states stay neutral during the war between france and england as president, washington believed that the united states should remain neutral in foreign policy even though he had advisors who recommended that he take sides during the war between france and england. washington did not make policy decisions during his presidency because he did not want to interfere with the policy-making powers that the constitution gave congress. washington refused to accept entirely the recommendations of either his secretary of state thomas jefferson, who was pro-french, or his secretary of the treasury alexander hamilton, who was pro-britis