ACTIVITY 5: Let's Wrap up! Direction: Summarize what you have learned from the lesson and activities by choosing the correct word inside the parentheses. Use a separate sheet of paper and write only your answer 1-2. Plate Tectonics is a (law, theory) which suggests that Earth's lithosphere is broken into segments called (plates, faults) that are constantly moving and interacting in various ways 3-5. The Earth's lithosphere is composed of the (crust, core) and the upper part of the (mantle, core). It is subdivided into portions called plates that move as a single unit as it moves above a hot and weak layer called (geosphere, asthenosphere) that has a capability to flow. 6-7. There are two kinds of crust (Continental, Crustal) plates which is thicker but less dense, and Oceanic plates which are (smaller, thinner) but denser.​