Which of these are examples of mixing and separating?
removing seed casings from grains
a soda bottle bubbling when it is opened
a bright copper statue turning green from weathering
removing salt from seawater
water decomposing to oxygen and hydrogen

Removing seed casingsseparating

soda bottle bubbling when openedmixing as before it was opened nothing was happening but as it came in contact with atmosphere it started to bubble.

bright copper statue turning green from weatheringmixing as all vapours and gases in atmosphere combined with copper of that statue they started to change color of statue

removing salt from seawaterobviously removing as one component I.e salt is removed from another substance I.e salt water or salt solution

water decomposingobviously separating as it's constituent elements are removed from compound and converted into individual elements

HOPE IT HELPS !!!

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask

Photo means light and synthesis means combination so combination of light