Animals

Animals that have a backbone, can be further divided into fish, amphibians, reptiles, birds, and mammals, a protective skin covering, an inside skeleton, muscles attached to the bone, lungs, or gills for obtaining oxygen.

• Plants

• Invertebrates

• Vertebrates

• Sharks

Animals that do not have a backbone, some have hard outer coverings or shells (like insects, crabs, or clams). Others do not have a hard outer covering or shell (jellyfish and worms). Other examples are shrimp, crayfish, sponges, sea stars (not star fish!), or snails.

• Plants

• Invertebrates

• Vertebrates

• Sharks

__________ breathe with gills; (most) have scales and fins; most lay eggs, have a body temperature that changes with its environment (cold blooded)

• Fish

• Mammals

• Birds

• Reptiles

__________ spend the first part of their life they breathe will gills in water, and the adults breathe with lungs on land; have smooth, moist skin; most lay eggs; have a body temperature that changes with their environment (cold blooded)

• Fish

• Mammals

• Amphibians

• Reptiles

__________ breathe with lungs; have scales or plates; most lay eggs; have a body temperature that changes with their environment (cold blooded)

• Fish

• Mammals

• Amphibians

• Reptiles

__________ breathe with lungs; have feathers, a beak, two wings, and two feet; lay eggs; have a constant body temperature (warm blooded).

• Fish

• Mammals

• Amphibians

• Birds

__________ breath with lungs; have fur or hair; can nurse their young with milk; usually give birth to live offspring; have a constant body temperature (warm blooded).

• Fish

• Mammals

• Amphibians

• Birds

Some animals give birth to babies that look like small __________. As the babies grow, they change is size. Other changes might be color, shape, or type of covering. For example, horses give birth to babies that look like small horses and chickens lay eggs that hatch babies that look like small chickens.

• eggs

• organisms

• adults

• plants

Some animals begin as an _______ and then undergo changes in their life cycle. These changes may be in appearance, color, shape, or growth of new structures.

• egg

• organism

• adult

• plant

Animals changing during their life cycles is called __________.

• life cycle

• metamorphosis

• circle of life

• adaptation