dinosaur
One of a large group of reptiles that lived millions of years ago.
All dinosaurs lived on land.
direction
The course taken by a moving body.
Putting the car in reverse will change its direction.
down
Toward the ground.
The bicycle rolled down the hill.
E
environment
All the living and nonliving things that are around a living thing.
A drop of water, a rotting log, and a forest are different kinds of environments.
evaporates
The change in form that water goes through when it turns from a liquid to a gas.
As you boil water, it evaporates and becomes a gas.
exercise
Moving the body.
Walking fast is good exercise.
extinct
When all animals of one kind die; no longer existing as a species.
There are no dinosaurs today because these animals are extinct.
F
fault
A giant crack in a rock that makes up the Earth's surface.
A shift along the fault line caused the earthquake.
feather
Body covering of birds.
Feathers keep a bird warm.
fish
An animal that lives in water that has gills for breathing and fins for swimming.
Many fish have scales as a body covering.
flat teeth
Teeth that are good for grinding food.
Most plant-eating dinosaurs had flat teeth.
flower
The part of a plant from which seeds can develop.
This flower has a bright red blossom and a sweet smell.
fossil remains
What is left of a plant or an animal that lived long ago.
Scientists study fossil remains to learn more about dinosaurs.
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