mammals, fish, birds, reptile
frog, toad
cockroach, grasshopper, dragonfly
butterfly, mosquito, beetle, moth, housefly
has mass & occupies space
| feature | solid | liquid | gas |
|---|---|---|---|
| shape | definite | not definite | not definite |
| volume | definite | definite | not definite |
| compressibility | no | no | yes |
all living things reproduce to help own kind continue to exist
traits → controlled by genes
*not all traits are inheritable
heredity: passing on of traits