When a chemical change occurs,
A.
the colors of the substances involved never change.
B.
new substances with new properties are formed.
C.
it is always because something was burned.
D.
the newly formed substances have the same properties as the old substances.

Individuals within populations exhibit some diversity. as a result of possessing slightly different traits, some individuals are better able to survive and reproduce than others. if these individuals changes in the characteristics of the population may occur over time. the cumulative change in these characteristics is known as

Ajar is tightly sealed at 22°c and 772 torr what is the pressure inside a jar after its been heated to 178°c

All atoms of the same element have the same what? ? a. atomic number b. mass number c. atomic mass