Which of the following is not a likely result of regular physical activity?
a.
increased energy
b.
decreased attention span
c.
improved school attendance
d.
improved self-image

select the best answer from the choices provided.

a
b
c
d

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?