1. Why does the egg in salt water float?

Question

2. Why does the egg float in salt water?
[Are both the same in meaning?]

3. Compare the two buildings. Which one is the taller of the two?

4. Compare Building A with Building B. Which one is the taller between the two buildings?

5. Compare Building A and Building B. Which one is taller, Bilding A or Building B?

[Are they all grammatical?]

Answer 1

1 and 2 mean about the same, but 2 is phrased more smoothly, with the prep phrase AFTER the verb it’s modifying.

The others are all grammatically correct, but be sure to correct the spelling error in 5.