A student studies the gathering of frogs at the end of a pond, and has made the following notes in her lab book. Which of these is a CONCLUSION?

A)
The frogs are all of the same appearance.

B)
The frogs are attracted to the warmth of the sun.

C)
The shadier end of the pond has fewer frogs than the sunny end does.

D)
There are five times as many frogs at one end of the pond as at the other.

Explanation:

Choices A, C, and D are all observations. Choice A tells the student the color/look of the frogs.  Choice C tells the student that the darker end of the pond has less frogs than the lighter end and choice D supports choice C with numerals.

Choice B on the other hand, is a different observation.  The difference is that with the others, you can notice the observations right off the back, but for the student to know that the frogs are drawn to the sun, the student must experiment or wait to record this.  This end recording is also called a conclusion.

I hope this helped !

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation: