Descriptive investigations involve collecting data about a system, but not making tests or experiments.
Making tests belongs to experimental investigations.
Descriptive investigations aim to draw conclusions from observations of the fenomena, while experimental investigations design tests that let the researcher to compare results on different conditions with a control situation.
There is also the so called comparative investigations which collect data from under different conditions but do not include the control situtation.
Answer:
by diseases of mosquitos and sickness like chicken pocks
Explanation:
bevause of mosquitos a lot of people died of malaria and for chicken pocks they didn't have a medicine for it and many people died for this.
I'm pretty sure it is called withdrawal.
Answer:
The most common credible sources are scholarly journals, conference papers and books because these have been peer-reviewed (read and approved for publication by other authors). However, there are good websites that can be used; generally ending in . gov / . edu / .
Explanation:
Types of Sources
Scholarly publications (Journals)
Popular sources (News and Magazines)
Professional/Trade sources.
Books / Book Chapters.
Conference proceedings.
Government Documents.
Theses & Dissertations.
websites all depend on what you want to know!
Hope this helps!
