Answer:
D
Explanation:
If these three substances are mixed together with the required proportion, it would yield concrete all the time. Thus, the result is replicable, or repeatable, in future experiments.
The result is not from an observation of the natural world because the three substances were mixed together by man in a lab.
Aristocracy, I beleive. ........................................
They stabbed them at the back while the british were fighting total war against french empire.
Answer:
C)caffeine is the independent variable
Explanation:
Caffeine is the independent variable and word recall is the dependent variable. Word recall is dependent on the presence or absence of caffeine.
