A. Give an example of a situation or problem that would be difficult to test without a model and describe the model you would use. b. Describe a situation from the news or recent history where scientists were called upon to provide explanations of events and offer possible solutions to problems.

pls try and answer it all, if u rlly can't then u can answer 1 of them.. but it would help me if u answer both.

15 points come and ! which characteristic describes all bacteria? a rod-shaped b microscopic c multicellular d autotrophic

There are multiple lines of evidence that provide support for common ancestry and evolution. write 3-4 paragraphs describing at least three of them in detail. provide at least one example for each line of evidence.

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?