12. Which of the words below describe mud, sand, and tiny bits of rocks that cement together to form rock? a. Lava b. Magmas c. Fossils d. sediments 13. What type of rock can turn into a metamorphic rock? a. Igneous only b. Sedimentary only c. Metamorphic only d. Any type of rock 14. Which of the choices below is NOT one of the three types of rocks? a. Metamorphic b. Magma c. Sedimentary d. Igneous 15. What material is used to form igneous rocks? a. Magma b. sand c. gravel d. fossils 16. What is needed in order for a metamorphic rock to form? a. Pressure b. Heat c. Heat and Pressure d. Weathering 17. This rock was found near a volcano. What type of rock is this? a. Metamorphic b. Magma c. Sedimentary d. Igneous 1 18. What is the naturally occurring solid mass or aggregate of minerals or mineraloid matter called? a. Rock b. mineral c. crust d. mountain 19. What is the term for the continuous changing of rocks from one type to another? d. weathering c. metamorphic c. the rock cycle a. Erosion both the Earth's surface?​