Question

please proofread this:

The class should firstly pick up several objects that have different masses then measure their masses. Secondly, they should drop each object from the same height and use a stopwatch to record how long it took the objects to hit the floor. They should then repeat the second step multiple times and record each time. They should keep everything the same so that finally, they can find out the average time to takes for each object to fall. This will help the decide on whether lighter or heavier objects fall faster under gravity.

Keep my wording and list all errors. you do not need to change all the sentences, just ones that really need it. if you see a sentence is fine / good as is, dont bother to change it.

Answer 1

Thanks — below I list the errors sentence by sentence and give corrected versions only where needed.

1) Original: "The class should firstly pick up several objects that have different masses then measure their masses."
- Errors:
- "firstly" is stylistically weaker than "first" (minor).
- Missing punctuation before "then" (comma or use "and then").
- Repetition: "masses" used twice (stylistic).
- Suggested correction: "The class should first pick up several objects with different masses, then measure those masses."

2) Original: "Secondly, they should drop each object from the same height and use a stopwatch to record how long it took the objects to hit the floor."
- Errors:
- Tense/subject agreement/clarity: "to record how long it took the objects" is awkward. Use "each object takes" or "each object took".
- Suggested correction: "Secondly, they should drop each object from the same height and use a stopwatch to record how long each object takes to hit the floor."

3) Original: "They should then repeat the second step multiple times and record each time."
- Errors:
- Awkward/ambiguous phrasing: "record each time" — does not clearly say what to record.
- Suggested correction: "They should then repeat the second step multiple times and record the time for each trial."

4) Original: "They should keep everything the same so that finally, they can find out the average time to takes for each object to fall."
- Errors:
- Typo: "to takes" → should be "to take" or better "it takes".
- Comma placement: the comma after "finally" is unnecessary.
- Suggested correction: "They should keep everything the same so that they can find the average time it takes for each object to fall."

5) Original: "This will help the decide on whether lighter or heavier objects fall faster under gravity."
- Errors:
- Typo/word missing: "the decide" → should be "them decide" or simply "decide".
- Unnecessary preposition: "decide on whether" → better "decide whether".
- Suggested correction: "This will help them decide whether lighter or heavier objects fall faster under gravity."

Optional: a single corrected paragraph using the minimal changes above:
"The class should first pick up several objects with different masses, then measure those masses. Secondly, they should drop each object from the same height and use a stopwatch to record how long each object takes to hit the floor. They should then repeat the second step multiple times and record the time for each trial. They should keep everything the same so that they can find the average time it takes for each object to fall. This will help them decide whether lighter or heavier objects fall faster under gravity."

If you want I can keep more of your original wording (e.g., keep "firstly"/"record each time") and only correct typos — tell me your preference.