An exothermic reaction causes the surroundings to
a. warm up.
b. become acidic.
c. expand.
d. decrease its temperature.
e. release co2.

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.