20. Pg 34/35--Which of the big 5 Mass Extinctions is marked by the Dinosaurs going Extinct? (1 Point)
a. Ordovician-Silurian, 443 mya
b. Triassic-Jurassic, 200 mya
c. Cretaceous-Tertiary, 65 mya
Late Devonian, 354 mya
d. Permian-Triassic, 248 mya

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )