When Susan visited the Smithsonian Museum of Natural History in Washington D. C., the guide mentioned that many fossils and remains Dinosaurs may have been lost due to natural changes within the earth Using the rock cycle, explain how evidence of prehistoric life may be destroyed.

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.