At least how many hours of sleep do students ages seven to twelve need per night? seven eight nine ten

Nine  hours of sleep is needed by students of age 7 to 12

Explanation:

When kids are growing, they should have enough sleep. This is essential for their growth and development. Ultimately every creature needs to have enough sleep is best for the development of the brain, especially in the earlier event of the children. The wake-up circle also matters; irregular sleep, especially for young children, may affect their developments.

For instance, children below 5 have spent most of their sleeping that they have stayed awake. Overall, Children aged between 10-15 should spend 40% of their time sleeping.

its ten actually

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.

answer; knowledge,reason,and judgement;