One puppy eats dry food and another eats wet food. Both have the same fur color as their mother. The food caused their fur color.

A young bird builds its very first nest on its own, with no other bird showing it how. What does this show about nest-building?

A plant grown in a dark room has pale, thin leaves. This difference is caused by its _____.

Two kittens from the same litter have different fur patterns. What best explains this?

A dog sits on command after many weeks of practice with its owner. This is a _____.

Two oak trees grew from acorns of the same parent tree. One grew in full sun and one in deep shade. Which difference is most likely caused by the environment?

A child has blue eyes, and so do both of her parents. What does this shared eye color show?

A plant in good soil grows tall. In poor soil, the same kind of plant stays short. What caused this?

Two kittens from the same litter grow up apart, one indoors and one outdoors. Both have the same fur color as their mother. What does this show?

A child practices piano every day and becomes skilled at playing. This skill is best described as _____.

Which change on a cat's body was caused by something that happened to it?

Which of these does a rabbit learn from what happens to it instead of getting it from its parents?

Two flamingos at a zoo eat different foods, and one turns a much brighter pink. What caused this color difference?

Two goldfish hatched from the same batch of eggs. One grew in a small bowl and one in a large tank, and their sizes differ. What caused this?

A boy's skin turns darker after many days playing outside in bright sun. Is this change inherited or caused by the environment?

A storm snaps a branch off a young tree, and the tree grows with a crooked trunk. Will the seedlings from that tree be crooked too?

Two corn plants grew from the same packet of seeds, but one got plenty of water and grew much taller. What does this show?

A rabbit raised in a cold barn grows a thicker coat than its brother raised in a warm house. What caused the difference?

A cat kept indoors becomes heavy while its littermate living outdoors stays slim. What best explains this difference?

A boy has two tall parents but eats very little healthy food while growing up. What shaped how tall he became?