If a scientist found a sample of crystal, which had a large amount of
lead surrounding it, how would you describe the age of this crystal? Very young, old, or is the amount of lead not related to the age?

Where is the vascular system located

Rah is completing a school project on the expansion of fast food restaurants across the united states. she finds a map that shows a clear pattern of restaurants beginning in the east and expanding west. this map was most likely created using the technology of

Explain how earths tilt and revolution around the sun affects weather and climate