A prediction is not based upon evidence or reliable tests. A prediction is a guess as to what will happen in the future. Forecasts for example are nothing more than prediction, as even with "meteorological evidence", nothing is ever truly sure when in regard to wheather.
So "A"
Explanation:
Protons are the positively charged particles found in an atom.
- A proton is found within the nucleus of an atom.
- Together with the neutron, they make up the nuclear region of an atom.
Protons and neutrons constitutes the bulk mass of the atom.
The mass of a proton is 1.67 x 10⁻²⁷kg
The proton have the same mass as neutrons.
Compared to electrons, it is 1840 times the mass of an electron.
I believe it means that it takes a lot of heat in joules to make silicon vaporize so it stays solid until a great deal of heat has been added. By comparison, water has a latent heat of about 2260 joules per gram so vaporizes much more readily than silicon.
Single cell organisms can reproduce very quickly
7.A physical change occurs when a material changes shape or size but the composition of the material does not change.
8.Chemical properties can be observed only when the substances in a sample of matter are changing into different substances.
9. Materials can be classified as solids, liquids, or gases based whether their shapes and volume are definite or variable.
10. The Kinetic theory of matter states that all particles of matter are in constant motion.