What is sonar mapping?

• A technique used to create detailed maps of the sky using sound waves.

• A technique used to create detailed maps of the land using sound waves.

• A technique used to create detailed maps of the human body using sound waves.

• A technique used to create detailed maps of the ocean floor or other bodies of water using sound waves.

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What are mid ocean ridges?

• Underwater mountain ranges formed along tectonic plate boundaries.

• Underwater caves formed by volcanic activity.

• Underwater canyons formed by erosion.

• Underwater valleys formed along tectonic plate boundaries.

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This explains what the land looks like by including elevations of land. It can be seen on a detailed map of the surface features of land. It includes the mountains, hills, creeks, ocean depths, seafloors, and other bumps and lumps on a particular hunk of earth.

• seafloor spreading

• topography

• mid-ocean ridge

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Explain sea floor spreading.

• Sea floor spreading is the process of forming new oceanic crust at mid-ocean ridges and pushing older crust away.

• Sea floor spreading is the process of forming new continental crust at mid-ocean ridges and pushing older crust away.

• Sea floor spreading is the process of forming new oceanic crust at subduction zones and pulling older crust towards the continents.

• Sea floor spreading is the process of forming new oceanic crust at deep-sea trenches and pushing older crust towards the continents.

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What are the characteristics of mid ocean ridges?

• Volcanic islands formed along convergent plate boundaries

• Underwater mountain ranges formed along divergent plate boundaries

• Underground caves formed along subduction zones

• Deep trenches formed along transform plate boundaries

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What are the main differences between magma and lava?

• Lava is found in the Earth's mantle, while magma is found in the Earth's core.

• Magma is hotter than lava.

• Magma and lava are the same thing.

• Magma is beneath the Earth's surface, while lava reaches the Earth's surface.

What evidence supports the theory of sea floor spreading?

• Fossil records, ocean currents, and tides.

• Volcanic activity, earthquakes, and tsunamis.

• Different ages of rocks from different areas of the oceanic crust, changes found in magnetism of rocks found in the crust, and presence of mid-ocean ridges,.

• Weather patterns, climate change, and ocean salinity.

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What is plate tectonics?

• The study of the Earth's atmosphere and weather patterns.
• The process of erosion and weathering of rocks.
• The study of the Earth's magnetic field and its effects on the planet.
• The scientific theory that describes the large-scale movement of Earth's crust.

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Mountains, hills, plateaus, valleys, and plains are the types of

• countries

• landforms

• rocks

• plates

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Ocean trenches are

• Deep depressions in the ocean floor.
• Shallow areas in the ocean floor.

• Mountain ranges in the ocean.
• Volcanic islands in the ocean.