A. Filtration
This is because of the layers of Filter it goes through to make sure it is pure.
Solid- molecules vibrate in place and tightly packed
liquid-molecules fur shape of container and can slide past each other
gas-molecules also fit shape of container and have the most room
Answer:Oxygen
Explanation:
Oxygen gets reduced when iron is oxidized.
B
A qualitative observation describes the characteristics of a substance without quantifying them.
