Which of these are made up of matter? check all that apply.

parts of outer space where there is no air or atoms

salt dissolved in water

air in the lower levels of the earth’s atmosphere

leather made from cow hides

metal after if has been molded

salt dissolved in waterair in the lower levels of the Earth’s atmosphereleather made from cow hidesmetal after if has been molded

Explanation:

Matter is defined as material of substance which has mass and occupy physical space. Matter is some thing which contains atoms.So, from the given options the examples of matter are:

Salt dissolved in water: salt is made up sodium and chloride where as water is made of hydrogen and oxygenair in the lower levels of the Earth’s atmosphere: air mixture of gases and gases are made atoms of different elements.leather made from cow hides: processed product from the animal skin which is also made of organic matter that is carbon , hydrogen , oxygen and nitrogen.metal after if has been molded; they too are made up of atoms.

I'm not sure but i will try to find out