Hey thee fella!
Based on my broad information, the systems that help human to support there-selves would actually be the ( skeletal systems).
Physical change. Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. ... Physical changes occur when objects or substances undergo a change that does not change their chemical composition.
Draw eight circles and nine more in a big circle = this represents your nucleus
draw eight electrons (since electrons = protons in neutral elements) outside of it (2 in one ring, then 6 in a second ring)
If your findings disproves your hypothesis then your hypothesis is probably wrong.
Answer:
C combination reaction (synthesis) reaction
Explanation:
two chemicals are combined
