Scientists once believed that tyrannosaurus rex dragged its tail along the ground. today, they know that t. rex did not drag its tail but held it aloft, above the ground. this change in scientific consensus happened because
a. scientists liked the idea that t. rex held its tail aloft better.
b. no one supported the idea that t. rex dragged its tail on the ground.
c. the idea that t. rex held its tail aloft is an emerging idea that replaced the old idea.
d. the idea that t. rex held its tail aloft was supported by the studies of many scientists.

Me how do you name a compound with more than two elements?

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

What is the relation ship between structure and function in an organism