When making observations during an experiment, which of the following must be included? a. Descriptions of the appearance of any chemicals used. b. Explanations for why certain steps were carried out analysis of results. c. Descriptions of any changes in the system following an action. d. Descriptions of any non-changes in the system following an action a list of possible errors.

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30-01-2020
Chemistry

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When making observations during an experiment, which of the following must be included? a. Descriptions of the appearance of any chemicals used. b. Explanations for why certain steps were carried out analysis of results. c. Descriptions of any changes in the system following an action. d. Descriptions of any non-changes in the system following an action a list of possible errors.

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ajinems ajinems · Answer 1 · 2020-02-01T04:56:27+01:00

Answer:When making observations during an experiment, Descriptions of any changes in the system following an action and Descriptions of any non-changes in the system following an action a list of possible errors must be included. The correct option is C and D.

Explanation: During a scientific experiment procedures, observation is usually carried out to take into consideration an active information from the natural source. Data can be collected by the observer:

- quantitatively ( by counting and measuring data when numerical values are attached.

- qualitatively ( when the presence or absence of a property is noted). Hence, option C and D are correct.