Once ice forms on a lake in winter, the water underneath the ice remains about 4 c even if the air temperature just above the ice far below freezing. What property of water helps keep the water below the ice from freezing?

Hydrogen bonding. When the ice freezes, it becomes less dense and floats to the top. this insulates the water keeping it from freezing.

Explanation:

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.