Animals need air, water, and food in order to live and thrive.
Plants require air, water, nutrients, and light in order to live and thrive.
Nonliving things do not live and thrive.
Nonliving things can be human-created or naturally occurring.
Living things grow, take in nutrients, breathe, reproduce, eliminate waste, and die.
wings, legs, or fins enable some animals to seek shelter and escape predators the mouth, including teeth, jaws, and tongue, enables some animals to eat and drink
the mouth, including teeth, jaws, and tongue, enables some animals to eat and drink
eyes, nose, ears, tongue, and skin of some animals enable the animals to sense their surroundings
claws, shells, spines, feathers, fur, scales, and color of body covering enable some animals to protect themselves from predators and other environmental conditions, or enable them to obtain food
some animals have parts that are used to produce sounds and smells to help the animal meet its needs
the characteristics of some animals change as seasonal conditions change (e.g. , fur grows and is shed to help regulate body heat; body fat is a form of stored energy and it changes as the seasons change)
animal adaptations include coloration for warning or attraction, camouflage, defense mechanisms, movement, hibernation, and migration
Multicellular animals often have similar organs and specialized systems for carrying out major life activities.
Living things are classified by shared characteristics on the cellular and organism level. In classifying organisms, biologists consider details of internal and external structures. Biological classification systems are arranged from general (kingdom) to specific (species).