Water is an example of
o
an atom.
a molecule.
a chemical
a complex system.
o

The influenza virus cause the flu, but not other diseases. why?

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back