When the temperature reaches 0˚C (32˚F), the top layer of the lake freezes and turns into ice. In solid form, water molecules are less dense and thus ice floats on the top of the lake.
This solid barrier prevents any wind-induced mixing as well as protects the relatively warm water underneath. Furthermore, light is also blocked so that photosynthesis is inhibited during this period. As the lake water is separated from the atmosphere, no direct oxygen diffusion occurs.
All these factors together causes a more even distribution of nutrients and gases in a lake in winter.
The particles of the chair are strongly held together.
Answer:
A
Explanation:
Firstly, if those ions were as helpful to 9 out of 10 people as they claim, it would have already been sold out.
Secondly, even if the data is correct, such product would not be for sale but for customization.
The ribosomes build proteins.
