Molecular models of two different substances are shown below. In the molecule on the left, the oxygen atom pulls on electrons more strongly than
the hydrogen atoms. In the molecule on the right, the two oxygen atoms pull
on the shared electrons with the same strength.
Water molecule, H2O Oxygen molecule, O2
When the two substances are put in the same container, they do not attract
each other. Why does this happen?
A. They are both polar.
B. One is polar and one is nonpolar.
C. They contain different elements.
D. They both contain oxygen.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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b. climate change will cause an increase in biodiversity of all ecosystems.

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