Chemistry major, are these physical change or chemical change?

Question

A. An iron nail is attracted to a magnet

B. A piece of paper spontaneously ignites when it reaches 451 F

C. a bronze statue develops a green coating over time

D. A block of wood floats on water

F. A piece of sliced apple turns brown

G. A slab of marble feels cool to the touch

H a sapphire is Blue

I. A clay pot fired in a kiln becomes hard and covered by glaze

help please!!!

Answer 1

A,D,G and H are physical changes and the rest are chemical changes

Answer 2

A. Physical

B. Chemical

C. Chemical

D. Physical

F. Chemical

G. Physical

H. Physical

I. Chemical

Take care,

David

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Answer 3

1. chemical

2. physical

3. chemical

4.physical

5.chemical

6.physical

7.chemical

8.chemical

i think these are correct at least close