Answer:
Basaltic magma forms in rifts or oceanic hotspots.
Basaltic magma is sometimes explosive.
Step-by-step explanation:
Basaltic magma is a type of magma that is typically associated with volcanic activity in rift zones, such as mid-oceanic ridges, or in oceanic hotspots. These are areas where the Earth's tectonic plates are moving apart or where plumes of hot mantle material rise through the crust.
Regarding explosiveness, basaltic magma is generally considered to be less explosive compared to other types of magma, such as andesitic or rhyolitic magma. This is because basaltic magma has a relatively low viscosity due to its lower silica content, which allows gas bubbles to escape more easily. However, this does not mean that basaltic eruptions are always non-explosive. Under certain circumstances, such as when water interacts with the magma, basaltic eruptions can become explosive, generating ash clouds and pyroclastic flows.
The statements about basaltic magma having the lowest temperature and containing high amounts of silica are incorrect. Basaltic magma typically has higher temperatures compared to other types of magma, and it has a lower silica content, which contributes to its lower viscosity and different eruptive behavior.