Density + Tectonic Plates

Name of when two plates push into each other

• Divergent

• Convergent

• Transform

• Emergent

Answer explanation

When two plates push into one another, that is convergent

Name of when two plates move away from each other

• Divergent

• Convergent

• Transform

• Subduction

When an oceanic crust converges with continental crust it will go under the continental crust. What is this process called?

• Subduction

• Convergent

• Divergent

• Transform

If two oceanic crusts converge, which one will sublimate underneath the other?

• New oceanic crust

• Old oceanic crust

• New continental crust

• Old continental crust

When two oceanic crusts are diverging, which of the following is going to be made?

• Islands

• Beaches

• Mountains

• Mid ocean ridge

How do convection currents work in the Earth’s mantle?

• hot magma rises up, becoming less dense and as it cools it becomes more dense and sinks

• Cold magma rises up, becoming less dense and as it warms up it becomes more dense and sinks

• Hot magma rises up, becoming more dense and as it cools it becomes less dense and sinks

• Cold Magma rises up, becoming more dense and as it warms up it becomes less dense and sinks

Answer explanation

Think of the video of convection currents using the red and blue food coloring. Heat rises, and as it cools it becomes more dense and sinks back down

What will form due to the hot magma rising and pushing on the plates above it?

• Islands

• Mountains

• Mid ocean ridge

• Trench

Answer explanation

As the magma pushes up on the plates, it also pushes them out and away from each other. When it does this, the plates will diverge, forming a mid ocean ridge.

Density can be in units other than kg/L

• True

• False

Answer explanation

Density can also be in g/mL and g/cm³

What are correct rearrangements of d=m/v

• m=d/v

• m= d*v

• v=m/d

• d=v/m

Answer explanation

If you do not understand the rearrangements, I strongly recommend you write the correct equations in your notebook for the quiz tomorrow

An object with a density of 2.1 g/mL displaces 17.7 mL of water. What is the objects mass? Do not record units, just the number. You will need to rearrange the equation d=m/v to find m

Answer explanation

To find mass, you could rearrange the density equation (d=m/v) to solve for m (m=d*v). This would give you m=(2.1)*(17.7). The final answer is 37.17 g