(PLEASE HELP ME)
Melissa is testing the effects of different sand formations near beaches on wave
patterns by making scale models and conducting a controlled experiment. In her
investigation, which variable should be changed and which should be held
constant?
A. changed variable: shape of sand formations, constant variable: amount of water,
speed of waves
B. changed variable: pattern of waves; constant variable: shape of sand formation,
amount of water
C. changed variable: pattern of waves; constant variable: speed of waves, amount of
water
D. changed variable: speed of waves, constant variable: shape of sand formations,
smouont of water
Answers: 1
Chemistry, 22.06.2019 05:50, mrylenastewart
Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4
Answers: 1
Chemistry, 22.06.2019 11:00, RidhaH
Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.
Answers: 1
(PLEASE HELP ME)
Melissa is testing the effects of different sand formations near beaches on wave
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