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:
2.E, 3.A, 5.C, 6.B, 8.D
Explanation:
There wasn't enough options for the amount of definitions you gave.
Answer:
Sand
Explanation:
Abiotic factors in an environment are all the non living organisms in an ecosystem. Fish, seaweed and a sea star are all biotic or living organisms in an ecosystem while sand is a non living organism in an ecosystem therefore it is an abiotic factor.
Answer: Option (A) - Approval of executed trades or orders
Explanation:
Some of the roles that can be performed by municipal securities principal or municipal securities sales supervising principal include:
*** The approval of opening of customer accounts
***Approving discretionary accounts and related transactions
***Approval of advertising
***Communication with investors indirectly or directly concerning municipal securities
***Reviewing correspondence relating to sales to purchase from customers.
From the above information, it is fair enough to note that their roles do not in anyway include approving executed trades or orders
