Question

lesson 2

• scientists used a device called an to measure ocean depths.(2)
• this device produces that travel from a ship to the seafloor.(2)
• scientists created maps of the seafloor using this data. (2)
• mountain ranges in the middle of oceans are called .(3)
• deep underwater valleys are called ocean .(3)
• the in the pacific ocean is the deepest landform on earth. (3)
• scientists created maps showing points of the same age on the seafloor. (4)
• the youngest ocean crust is near (4)
• older ocean crust is found along ocean .(4)
• the seafloor as you move further away from a mid - ocean ridge. (4)
• is the process by which new oceanic crust forms along mid - ocean ridges.(5)
• molten rock below earth’s surface is called .(6)
• when magma reaches earth’s surface, it’s called .(6)
• as lava cools on the seafloor, it forms new crust.(6)
• the two halves of oceanic crust spread apart like a .(6)
• the cold and rigid outermost rock layer is called the .(8)
• the lithosphere includes the crust and the solid, uppermost .(8)
• earth’s are large pieces of lithosphere.(8)
• below the lithosphere is the hot , which flows and enables plates to move.(9)

lesson 3

• a boundary forms when two plates collide. (4)
• a boundary forms when two plates separate.(5)
• a boundary forms when two plates slide past each other.(6)
• when a dense oceanic plate collides with a less - dense continental plate, the denser plate under the other plate.(4)
• this process is called .(4)
• when two continental plates collide, large form.(8)
• the plates fold or crumple upward, forming mountains.(8)

Explanation:

These are fill - in - the - blank questions related to oceanography and plate tectonics. Knowledge of geological terms and ocean - related processes is required. For example, an echo - sounder is used to measure ocean depths, producing sound waves that travel to the seafloor, and mid - ocean ridges are mountain ranges in the middle of oceans. Plate boundaries are formed by different plate movements, and processes like subduction occur when plates interact.

Answer:

• Scientists used a device called an echo - sounder to measure ocean depths.
• This device produces sound waves that travel from a ship to the seafloor.
• Scientists created bathymetric maps of the seafloor using this data.
• Mountain ranges in the middle of oceans are called mid - ocean ridges.
• Deep underwater valleys are called ocean trenches.
• The Mariana Trench in the Pacific Ocean is the deepest landform on Earth.
• Scientists created age - of - crust maps showing points of the same age on the seafloor.
• The youngest ocean crust is near mid - ocean ridges.
• Older ocean crust is found along ocean trenches.
• The seafloor spreads as you move further away from a mid - ocean ridge.
• Seafloor spreading is the process by which new oceanic crust forms along mid - ocean ridges.
• Molten rock below Earth’s surface is called magma.
• When magma reaches Earth’s surface, it’s called lava.
• As lava cools on the seafloor, it forms new oceanic crust.
• The two halves of oceanic crust spread apart like a conveyor belt.
• The cold and rigid outermost rock layer is called the lithosphere.
• The lithosphere includes the crust and the solid, uppermost mantle.
• Earth’s tectonic plates are large pieces of lithosphere.
• Below the lithosphere is the hot asthenosphere, which flows and enables plates to move.
• A convergent boundary forms when two plates collide.
• A divergent boundary forms when two plates separate.
• A transform boundary forms when two plates slide past each other.
• When a dense oceanic plate collides with a less - dense continental plate, the denser plate subducts under the other plate.
• This process is called subduction.
• When two continental plates collide, large mountains form. The plates fold or crumple upward, forming folded mountains.