A dental cavity is a hole that forms in a tooth when the outer coating

Echolocation is a method in which animals make use of sound waves to understand their

Magnets are objects that create an invisible field that can attract magnetic objects and repel

The human skeletal system comprises bones, cartilage and other structures that give the body its

The human circulatory system comprises the heart, blood and blood vessels and carries oxygen and

The process by which pollen grains are carried from a flower’s male reproductive parts to

The human immune system is a system within the body that protects humans from diseases

Hibernation is a function that enables animals such as groundhogs, hedgehogs, marmots and bears to

A flood is a phenomenon that takes place when water overflows onto land that is

The respiratory system includes the mouth, nose, larynx, lungs and other organs that help humans