The pH scale expresses the concentration of hydroxide
concentration of hydrogen ion
concentration of electrons

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.