Igneous Rocks!
Can fossils form in igneous rocks?
No!
What does molten mean?
Melted
How is an igneous rock formed?
When lava or magma cools
What is molten rock above ground?
What is molten rock below ground?
Lava
Magma
What evidence can be used to argue that plate movement is still happening today?
- Scientists can measure movement with new technology
- Can see change over time or quickly after big disasters
What effects the crystal size in an igneous rock?
Intrusive rocks cool slower= bigger crystals
Extrusive rocks cool quicker= smaller crystals
What does intrusive mean?
What does extrusive mean?
Below Earth's surface
Above Earth's surface
How can understanding of tectonics help minimize hazards caused by earthquakes and volcanoes?
Scientists can predict when and where these things will occur and better prepare communities for them by doing things like building better structures.
What is the best question to ask when trying to figure out how an igneous rock formed?
What size are the crystals in the rock?
What are 3 facts about the lithosphere?
- The upper mantle is found in this layer
- Earthquakes happen in this layer
- Tectonic plates are in this layer
What two statements can be made when it comes to Earthquakes and Volcanoes?
- Volcanoes and earthquakes are often found near plate boundaries
- Scientists can predict where many volcanoes will erupt and earthquakes will occur
What are 3 facts about the asthenosphere?
- This layer drives the movement of the plates
- This layer is semisolid
- Convection happens in this layer