the answer is a because if the model is based on experimental data it wont be good unless it has been tested.
For questions 11-15
11. Magnesium Oxide is a combination between Magnesium and oxygen so the formula will be MgO
12. Calcium Chloride is a combination between Calcium and Chlorine, so the formula will be CaCl₂ the ₂ comes from the fact that there is two Chlorine atoms
13. Lithium Sulfide is a combination between Two lithium and a sulfur atoms,
so the formula will be Li₂S The ₂ coming from the two lithium atoms
14. Barium Selenide is a combination between Barium and Selenium so the formula will be BaSe
15. Aluminum Oxide is a combination between Aluminum and Oxygen, there are two Aluminum atoms and three Oxygen atoms, so it will make Al₂O₃
Hope this helps
Invasive species or environment
Answer:
B. They last much longer than traditional lightbulbs
Many of the skeletons have associated age, sex, ancestry, and cause of death data. Individual remains with known biological information are especially valuable references. Forensic anthropologists have used these skeletons to develop standards for determining sex, age and ancestry in unknown remains
