2. A solvent is the component in a solution that is present in the largest amount. In a NaCl solution (salt-water), the solvent is water.
3.No sunlight penetrates below 1,000 metres (about 3,300 feet). There are many ways of measuring light attenuation in the oceans.
4.No,not the whole spectrum of light can pass through water. Water is very good absorber for most of the spectrum of light that means it is nearly opaque for most of the em waves.
5. A solution is homogenous and 1 phase. A colloid is heterogeneous, and consists of more than 1 phase.
