Making community gardens to reduce the excess CO2 in the atmosphere
D. NaCl contains an ionic bond and C12H22O11 contains covalent bonds.
Patients with osteoporosis often suffer compression fractures of the vertebral bodies due to loss of bone mass. Osteoporosis is a condition where the bones become weak and at a risk of being fractured. It occurs when the bone mass decreases after mostly 35 years of age. It mostly occurs in women after menopause due to a reduction in estrogen.
The scratch test.
The scratch test is used by scientists and people who study rocks and minerals to determine the strength of the rock. They have the scratchers numbered one through ten and scratch the rock or mineral until the scratcher makes a mark in the mineral then they know the strength of the rock.
