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.
Answer:
No comment...
Explanation:
Is this really where people are bringing this stuff to now? A website where students and teachers alike work together to answer "ACADEMIC" questions? Most people like to get away with all the drama that's brought up with politics. Unless this was actually a question assigned to you by your teacher, keep this to yourself please. If you genuinely want to know people's opinions on this subject, just go to social media, watch the news or just even google it. I joined this website about 10 minutes ago but I think i already know that this was something not particularly searched for on this website.
The correct answer is letter A.
An anticline and a fold with its concavity facing downwards, and at its core are older rocks or extracts.
A syncline is a fold with the concavity facing upward, displaying layers that hang toward the center of the structure.
