Read the following paragraph from the section "Studying Sea Otter Habitat.
Islands without sea otters had huge urchins that littered the barren seafloor. The underwater
forests of kelp that once grew there had disappeared. The urchins consumed every kelp plant in
sight. "Our results were eye-opening," he says.
Which word from the paragraph helps the reader to understand the meaning of "barren"
(A)
huge
(B)
littered
(C)
disappeared
(D)
eye-opening

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

16

explanation:

the marks go by 4s