Earth's plates interact by sliding, colliding, and ______.

Earth's plates interact by sliding, colliding, and ______.

• A. Changing Shape
• B. Melting
• C. Sliding
• D. Pulling Apart

Answer: (D)

At plate boundaries, Earth’s lithospheric plates move in three main ways: sliding past one another, colliding, and pulling apart. The missing term is pulling apart, which describes divergent boundaries where plates move away from each other. As they separate, magma from the mantle can rise to fill the gap, cool, and form new crust. This creates features like mid-ocean ridges and rift valleys. The other ideas don’t fit as the described interactions: changing shape isn’t a standard boundary movement, melting is a process that can occur during plate interactions but isn’t the movement itself, and sliding is already listed among the interactions.

At plate boundaries, Earth’s lithospheric plates move in three main ways: sliding past one another, colliding, and pulling apart. The missing term is pulling apart, which describes divergent boundaries where plates move away from each other. As they separate, magma from the mantle can rise to fill the gap, cool, and form new crust. This creates features like mid-ocean ridges and rift valleys. The other ideas don’t fit as the described interactions: changing shape isn’t a standard boundary movement, melting is a process that can occur during plate interactions but isn’t the movement itself, and sliding is already listed among the interactions.