Transcript Igneous Rocks, Minerals, and Volcanos

A Think-Pair-Share Assessment
• Best procedures: read quietly to yourself
(so you don’t give any subconscious clues)
• As the instructor, we read it too, for timing, then ask if anyone
needs more time
• If not, it’s time to vote simultaneously—use your fingers, right
in front of your chest so others don’t see (anonymous)
Igneous rocks can form from
1.
2.
3.
4.
5.
an igneous rock that has partially melted
metamorphic rocks under intense pressure
sedimentary rocks that vaporized during an impact
All of these
None of these
Another
Which types of rocks can have layers?
1. Metamorphic and sedimentary
2. Sedimentary
3. Sedimentary and igneous
4. Sedimentary, igneous, and metamorphic
Which are most likely to be sedimentary
rocks?
1.
2.
3.
4.
5.
Large smooth stones on a beach
Layers of rocks that have been uplifted and
cut through by a river
Young rocks formed inside the floor of a wet
cave
All of these
None of these
What happens to slate (a metamorphic
rock) when it’s exposed to heat and
pressure?
1.
2.
3.
4.
It changes to a higher grade of metamorphic
rock with larger minerals
It gets flatter and denser but looks and stays
the same type of rock
It melts and forms new minerals
All of these
Where are we most likely to find
metamorphic rocks?
1. In abyssal plains on the ocean floor
2. In a river valley cutting through a very
eroded mountain
3. At the tops of young mountains formed
during continental collisions
4. In the middle of a deposit of cooled lava
Where are we most likely to find igneous
rocks?
1.
2.
3.
4.
5.
At the tops of young mountains formed during
continental collisions
In an island arc formed next to a subduction
zone
Along a transform boundary on a continent
All of these
None of these