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The Moving Crust
4th grade science
| Question | Answer |
|---|---|
| The place where plates slide past each other | Fault |
| When a plate slides up and the one next to it slides down, the rising plate will create this | Fault block mountain |
| A high landform with a flat top Created when the lifting plate spreads over a wide area | Plateau |
| When plates slide toward each other and a bend occurs in the rock layers | Fold |
| When plates move toward each other and the land keeps scrunching, a tall landform that rises to a peak forms this | Fold mountain |
| A sudden shaking of the Earth's crust | Earthquake |
| During a major earthquake, the safest places to be are | In a doorway, under a table |
| Earthquakes in the ocean | Tsunami |
| Vibrations caused by earthquakes | Seismic waves |
| An instrument that detects and records earth quakes | Seismograph |
| What causes earthquakes? | plates move along a fault causing the rocky crust to break apart |
| How do earthquakes travel? | Begins below the ground. The waves travel like the ripples of water moving away from the center. |
| How can an earthquake cause a tsunami? | the Crust of the ocean bottom lifts - earthquake at the ocean bottom |
| A mountain that builds up around an opening in the Earth's crust to the hot layers below | Volcano |
| Where do earthquakes begin? | Along a fault |
| What do we call the vibrations from an earthquake? | Seismic waves |
| Materials from the Earth's interior forced out of an opening of a volcano | eruption |
| melted rock below the surface of the earth | magma |
| melted rock that reaches the earth's surface | lava |
| When lava and ash cool from a volcano eruption it forms . . . | rock |
| Where do volcanoes form? | At the edges of plates |
| How does a volcano form? | 2 plates meet One sinks below the other the sinking plate gets hotter the rock on the sinking plate melts into magma the magma rises |
| Places where the earth's crust is very thin and magma can easily break through earths surface | hot spots |
| a hot spot in the Pacific Ocean formed huge volcanoes on the ocean floor that rose about the water and formed these | The islands of Hawaii |
| Why do earthquakes happen suddenly? | The plates move slowly and build up energy in the rocks at the edge. When the energy builds up, it finally releases in one big burst. |
Created by:
kolsen
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