It primarily shows boundaries and landforms
I believe the answer is true
Led factories and other businesses to slow down production and begin firing their workers.
Answer:
A control should have been included in the investigation
Explanation:
It is impossible for the student to interpret a correct conclusion about his experiment, without adding a control treatment where he can really compare the differences between the variables.
Control treatment is an element of research that receives all factors, except the variable being tested. The control serves to make comparisons with the other treatments, allowing to observe the exact difference between a system where the variable was tested and the system where it was not.
In the case of the question above, it would have been necessary for the student to have placed a cart on a ramp of normal height and without sandpaper. That way he could compare the speed between this cart and the carts on the other ramps, thus having a correct result.
Astronomy is the science of the study of planets stars and other extraterrestrial body's in outer space they will often use things like telescopes and electronic equipment as like but can use the hubble telescope as well
