1. obtain a set of "finch cards" and sticky notes. working with your team (group), examine the cards of the galapagos finches and arrange the species into groups based on their characteristics. grouping species according to shared characteristics can provide clues to how they have evolved. 2. on a sticky note or index card, give each group an informative name and list the evidence for each grouping. 3. gallery walk. walk around to the various groups and examine their displays, paying attention to the following: • how were other teams’ groupings similar to your team’s? how were they different? • what evidence did your classmates use to justify their groupings? • how does the evidence they provided support their groupings? using a sticky note provide constructive feedback by individually writing a question and initialing it. (i. e. why did you put this bird in this group? what do the birds in this group have in common? is there another way you could group them? ) 4. based on what you observed during your gallery walk, feel free to make changes to your own groupings. record in your bill: • you teams grouping/rationale • answer the question: what additional evidence would you need to better justify your team’s groupings? "

a. formula: f=ma or f/m=a

10,000n/1,267kg≈7.9m/

b. formula: a= and s=d/t

speed= 394.6/15

s=26.3m/s

a=

a=1.75m/

c. 7.9-1.75=difference of 6.15m/

d. the force that most likely caused this difference is friction forces

true

can you explain it better

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals