Here's how you can form the new words and complete the sentences:
Since the data from the experiment is false, we can disregard it.
(Prefix "dis-" added to "regard" to imply ignoring or not considering.)He knows a lot and his speech is always interesting like a story-telling.
(Suffix "-ing" added to "tell" to form "telling".)Respiration involves a series of chemical reactions inside the plant cell.
(Suffix "-ion" added to "react" to form "reaction".)A very serious mistake was overlooked in this experiment that is why it’s failed.
(Prefix "mis-" can be used to form "mis" + "take", but "mistake" is a common word; alternatively, "misunderstanding" or "miscalculation" could fit, but given the list, "mistake" is best.)An astronomer observes a comet moving to predict its path.
(Suffix "-ing" added to "move" to form "moving".)I would like you to consider this idea because it may give us some advantages in the future.
(Use "consider" as is, or "consideration" if a noun is intended, but the sentence suggests a verb form is suitable.)
Note:
For sentence 4, since "mistake" is not directly formed from "take" with the given suffixes, a better fit from the list might be "misjudgment" or "misunderstanding," but these are not in the list. Alternatively, since the list contains "take" with two instances, you can consider "mis" + "take" forming "mistake".
Final answers:
- disregard
- telling
- reactions
- mistake
- moving
- consider