In this case the answer is fuel
The answer is graduated cylinder.
Dani requires a graduated cylinder to measure
the volume of the pebbles. A graduated cylinder is actually laboratory
equipment to measure the volume of a liquid. Dani must place a specific amount
of liquid in the cylinder and record the amount. Dani will then put the pebbles
inside the cylinder and subtract the amount of liquid previously recorded to
the current amount to get the volume of the pebbles.
i believe it is phenotype
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.
Answer:
there are called transition metal
