Answer:
Withdrawal
Explanation:
Chan is experiencing withdrawal. Since he drinks 4 cups of coffee each day, the terrible headache he has that stopped him from concentrating is the Physical and mental symptoms that occur when someone stops or limits his intake of a substance that has become a habit, in this case coffee.
Because taking coffee is already a habit, he had this headache without it because his brain has become used to it and now missing it causes a rush of adrenaline by the brain.
<span>Earth's geochemical and biogeochemical cycles are important because they tend to maintain a balance of Earth's materials.
True
On Earth, old matter is recycled into new matter.
True</span>
Lots and lots more than you think
Answer:
external
Explanation:
The process of applying the conclusion of a particular scientific study into a study which is outside its context is said to be external validity. The conclusions derived in one particular study is applied to other situations through external validity. There are cases when such generalization brings a negative result to the study. Also, the factor of generalization is limited to some extent.
