Is the following radiation, conduction, or convection? in a factory there is a large vat of liquid. the liquid is heated. as the liquid gets hot, it rises in the vat, reaches the top, cools, and falls back down to the bottom of the pan where it is heated again, and the cycle continues. a)radiation b)conduction c)convection

The correct answer is option C.

Explanation:

Radiation is defined as a transfer of energy by the means of electromagnetic waves.

Conduction is defined as a transfer of heat energy from hotter body to cooler through means of direct contact.

Convection is defined as a transfer of heat by the means of the movement of matter(liquid or gas)

In the given situation, the heat is transferred by the means of movement of matter that is water vapors here.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.