10. A student is planning an investigation to explore different properties of matter. Which investigation will help the student explore a physical property of matter?
a. Investigation: Place a solid in a beaker and add a small amount of liquid.
Observation: The beaker becomes warm to the touch.
b. Investigation: Add a small amount of solid to a liquid in a beaker.
Observation: The solid dissolves in the liquid.
c Investigation: Add a small amount of solid to a liquid in a beaker,
Observation: The solution starts to fizz and overflows the container,
d Investigation: Place a solid in a beaker and add a small amount of liquid.
Observation: Bubbles form on the top of the solid,

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.