Amphibians, Reptiles, Fossils

Fossils found in higher layers of rock are usually

• older than fossils found in lower layers.

• the same age as fossils found in lower layers.

• more decayed than fossils found in lower layers.

• younger than fossils found in lower layers.

One animal that cares for its newly hatched young is a(n)

• turtle.

• lizard.

• snake.

• alligator.

Amphibians are especially sensitive to changes in the environment because

• their skin is thin.

• few amphibians have camouflage.

• they do well only in sunny areas.

• they do well in dry and in moist areas.

The name amphibian refers to an amphibian's ability to

• catch insects.

• close its eyes.

• live both in water and on land.

• circulate blood with a three-chambered heart.

Fossils are found most frequently in a kind of rock called

• sediments.

• sedimentary rock.

• lava.

• dinosaur rock.

Many reptiles live in environments that consist of warm, dry air. Due to these living conditions the skin, kidneys, and eggs of reptiles have adapted to

• use the sun for energy to make food.

• blend in, or become camouflaged with the environment.

• conserve water.

• live both in water and on land.

How is a reptile egg different from an amphibian egg?

• It is covered with a protective jelly.

• It has a soft, leathery shell.

• It must be kept in shallow water.

• It is fertilized externally.

Since most fishes, amphibians, and reptiles have body temperatures close to the temperature of their environment, they are referred to as

• invertebrates.

• ectotherms.

• herbivores.

• pests.

Which of the following is LEAST likely to be learned by studying a fossil?

• the approximate age of the fossil

• what type of skin the animal had when it was living

• whether the species was an invertebrate or a vertebrate

• the size of the organism when it was living

Select ALL that could become a fossil.

• tree branch

• egg

• footprint

• muscle

• heart