Don't take my word for it but I think it is 1: proteins 2: energy from the sun, carbon dioxide, and water 3: this one is confusing me but I think it would be nutrients from food and oxygen 4: water Again these are attempts I can't prove these
Density, mass, volume, color, melting and boiling points, etc. are all physical properties. No matter what changes, the chemical makeup stays the same.
Flamability, acidity, toxicity, etc. are chemical properties, because they chemically change the makeup of the object/thing.
