The great lakes of the united states are often covered with a sheet of ice every winter. which best explains why this ice does not sink to the bottom? cold air temperatures attract the ice to the surface. ice is less dense than water. aquatic life buoys the ice. water currents prevent the ice from sinking.

i believe its because ice is less dense than water

The correct answer would be ice is less dense the ice.

Explanation:

The water has a unique property of expansion exceptionally. Water is normally dense at room temperature and cooling it down is leads to an increase in the density of water. It reaches its highest density at the temperature of 4° C but further cooling decreases its density. Ice is forming below 0° C from water thus it is less dense than water.

Thus, the correct answer is ice is less dense than water.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.