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.
It would be a class system. Hope i helped
Explanation:
On March 5, 1770 the dreadful day came. A mob of people went in front of the Customs Office in Boston Massachusetts and started to throw stuff and give insults at the soldiers. As a result to this so-called harassment the soldiers fired on the crowd. The first to die was an African-Amercan man named Crispus Attucks.
Answer:
Directional Beacons
Explanation:
- <u>Directional Beacons</u> are a feature of audible pedestrian crosswalk signals
Directional Beacons are efficient and help the blind cross the street since flashing lights aren't seen by them.
Mordancy.
Answer:
In 1824
Explanation:
The election8l was decided by the house of representatives which elected John
