13. ______________ weathering is the breakdown of rock through mechanical disintegration and physical stress.
14. Water, wind, and ice are ______________ forces that act on rocks in the rock cycle.
15. Mechanical weathering does not change the _________________ of rocks.
16. Observing the ___________ of a mineral is a reliable way to identify it.
17. ________ ___________ is the source of heat and pressure required to create metamorphic rocks.
18. Mechanical weathering breaks rocks into smaller pieces without changing them, while chemical weathering changes the ___________________ of rocks.
19. The layers or banding of some metamorphic rocks is called _______________.
20. The type of sedimentary rock formed from fragments of minerals or rocks is __________________. fill in the blanks
