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Why does the oceanic crust sink beneath the continental crust?

The diagram shows 2 pieces of Earth’s crust pushing into each other. It appears that the oceanic crust is sinking below the continental crust at this location. Why does the oceanic crust sink beneath the continental crust? (1) The oceanic crust has a greater density.

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Why does the oceanic crust sink beneath the continental crust?

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  1. The diagram shows 2 pieces of Earth’s crust pushing into each other. It appears that the oceanic crust is sinking below the continental crust at this location. Why does the oceanic crust sink beneath the continental crust? (1) The oceanic crust has a greater density. (2) The oceanic crust is pulled down by Earth’s magnetic field. (3) The continental crust is stronger. (4) The continental crust is pulled upward by the Moon’s gravity.

  2. V = L x W x H If an object is “regular” volume can be calculated. = mL V = cm x cm x cm = cm3

  3. What is the object’s density? V = L x W x H = 3.7 cm x 1.2 cm x 16.3 cm = 72.4 cm3 Density = Mass / Volume Density = 273.8g / 72.4 mL Density = 3.78 g/mL

  4. Liquid volume can be measured in graduated cylinder. If mass of green liquid is 67.8 g… Density = Mass / Volume Density = 67.8g / 60.4 mL Density = 1.12 g/mL

  5. If an object is “irregular” volume can be measured by water displacement.

  6. If an object is “irregular” volume can be measured by water displacement. Know your starting volume! 60.5 mL – 50 mL = 10.5 mL

  7. Water displacement can.

  8. Measure water that comes out in a graduated cylinder...

  9. What is the object’s density? 19.8 mL – 17.1 mL = 2.7 mL Density = Mass / Volume D = 51.842g / 2.7 mL D = 19.2 g/mL

  10. Remember to ALWAYS follow the steps:

  11. Remember to ALWAYS follow the steps: Write equation

  12. Remember to ALWAYS follow the steps: Write equation Substitute values with units

  13. Remember to ALWAYS follow the steps: Write equation Substitute values with units Calculate and record answers with units

  14. Remember to ALWAYS follow the steps: Write equation Substitute values with units Calculate and record answers with units

  15. According to an electronic balance, this rock has a mass of 13.7 g. What is the rock’s density? mL mL

  16. A graduated cylinder has a mass of 40 g. A student determines the volume of liquid in a cylinder as shown: She measures the mass of the liquid AND the cylinder as 85 g. What is the liquid’s density? = 85g – 40 g /32.0 mL Density = mass/volume = 1.4 g/mL

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