Think of a way to compare the total mass of unicellular planktonic algae in two adjacent ponds.

It is necessary to measure the volume of the ponds (dimensions). Take samples of algae in different places and depths, filter them, weigh and then calculate the mass of algae in ponds. Samples should be taken with a volume of at least 100 ml, preferably 1 liter for ease of calculations.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.