theory of plate tectonics
The theory explaining that the Earth's plates, or large slabs of rock, are constantly moving, causing continents and oceans to form, be destroyed, and reform over very long periods of time.
The theory of plate tectonics explains what causes earthquakes.
thunderstorm
A storm that produces lightning and thunder and often heavy rain and strong wind.
When the weather is hazy, hot, and humid, thunderstorms are likely to develop.
tropical rain forest
A type of rain forest where conditions are very warm and humid.
Many types of parrots live in tropical rain forests around the world.
U
understory
The level of the rain forest just below the canopy.
Insects flew through the understory.
up
Toward the sky.
The ball flew high up in the sky before falling back to earth.
V
W
warm up
Movements done to get the body ready to exercise.
The runner stretched to warm up before the race.
water cycle
The path that water follows as it evaporates into the air, condenses into clouds, and returns to Earth as rain, snow, sleet, or hail.
After the sun's heat dried up the pond, water from rain filled it back up, completing its journey through the water cycle.
wheel
A round ring with spokes that is attached to objects to move them.
A tricycle has one more wheel than a bicycle.
ARIZONA WEBCAMS theory of plate tectonics
The theory explaining that the Earth's plates, or large slabs of rock, are constantly moving, causing continents and oceans to form, be destroyed, and reform over very long periods of time.
The theory of plate tectonics explains what causes earthquakes.
thunderstorm
A storm that produces lightning and thunder and often heavy rain and strong wind.
When the weather is hazy, hot, and humid, thunderstorms are likely to develop.
tropical rain forest
A type of rain forest where conditions are very warm and humid.
Many types of parrots live in tropical rain forests around the world.
U
understory
The level of the rain forest just below the canopy.
Insects flew through the understory.
up
Toward the sky.
The ball flew high up in the sky before falling back to earth.
V
W
warm up
Movements done to get the body ready to exercise.
The runner stretched to warm up before the race.
water cycle
The path that water follows as it evaporates into the air, condenses into clouds, and returns to Earth as rain, snow, sleet, or hail.
After the sun's heat dried up the pond, water from rain filled it back up, completing its journey through the water cycle.
wheel
A round ring with spokes that is attached to objects to move them.
A tricycle has one more wheel than a bicycle.
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