The rocks in this scene were formed from a past lava flow. Over time, the rocks have eroded into smaller rocks due to mechanical weathering, which has started to change this igneous rock into sedimentary rock. Would this change be considered a physical or chemical change? Justify. Location: Big Island in Hawaii. Author: Karl Spencer.
In this scene, sunlight is gleaming near trees during a cold winter afternoon. An unbalanced chemical equation is also shown that represents the process of photosynthesis. How would you balance this equation? Justify by describing the process of photosynthesis as it impacts plants. Location: Bryce Canyon National Park. Author: Karl Spencer.
In this scene, various types of stems are included in a collage. Use the scene numbers to select and describe the following: bulb, tuber, corm and rhizome. Justify your selections by describing the function of how each undergoes vegetative propagation. Location: Classroom in Southeast Texas. Author: Karl Spencer.