13.The simplest pure substances that cannot be broken down into any other substances are called matter
c. mixtures.
bcompounds.
d elements.

Me the formula cacl2 represents the compound

Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.

Communication and transportation have improved as a result of scientific advancements. select the best answer from the choices provided of mark this and return save and exit next