Question

1. choose the correct answer.

what causes volcanic eruptions that form new igneous rock?
weathering and erosion
sediment deposition
plant roots
movement of tectonic plates

1. choose the correct answer.

____ help turn sedimentary and metamorphic rocks into igneous rocks.
heat and pressure
weathering, erosion, and deposition
melting and crystallization

Explanation:

Question 1

To determine what causes volcanic eruptions forming new igneous rock, we analyze each option:

• Weathering and erosion: These processes break down rocks, not cause volcanic eruptions. Eliminate.
• Sediment deposition: Involves laying down sediments, not related to volcanic eruptions. Eliminate.
• Plant roots: Affect soil/rock breakdown, not volcanic activity. Eliminate.
• Movement of tectonic plates: Tectonic plate movement can lead to magma rising, causing volcanic eruptions that form igneous rock. This is correct.

To find what turns sedimentary/metamorphic rocks into igneous rocks, we analyze:

• Heat and pressure: Form metamorphic rocks, not igneous. Eliminate.
• Weathering, erosion, and deposition: Form sedimentary rocks, not igneous. Eliminate.
• Melting and crystallization: Melting rocks (sedimentary/metamorphic) into magma, then crystallizing into igneous rocks. This is correct.

Answer:

D. movement of tectonic plates (assuming the options are labeled A - D as per the order, with the last option being D)

Question 2