Explain the difference between the geoid and the surface of the earth?
Explain what time period can carbon-14 dates have?
Explain what did radon detection in arid areas can help to explore?
Explain the minimum depth needed for a feature to be considered a canyon?
Explain what ways can igneous rock form two ways?
Explain the difference between a canyon, gorge, and valley?
Explain how old is the earth?
Explain the mantle made of?
Explain how continental heat flow is produced?
Explain why does marble rarely contain fossils?
Explain worm feeds itself by sucking the blood of animals and humans.after feeding, the worm becomes fat and falls off?
Explain what was the period of time two beat,s in hurts?
Explain how the slides and specimens used as instructional resources?
Explain which is better to grow plants in rock sand or soil?
Explain what happens when the cell membrane or plasma membrane ruptures or breaks down?