During a study of lichens and air quality in part of china, scientists measure the thickness of lichens and estimate how many rocks and trees are covered with lichens in one town. the scientists are following the scientific cycle of observing while using a systematic process, establishing facts, explaining facts, and then returning to the systematic process to collect more facts. when scientists carefully measure the lichens and agree on their average thickness and how often they appear, which parts of the scientific cycle are the scientists using? a. process and facts, because they are using a systematic method to measure and then record data? b. process and facts, because they are observing lichens and air quality and describing why they are related c. explanation and process, because they are using a systematic method to measure and then record data d. explanation and process, because they are observing lichens and air quality and describing why they are related

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made

i believe the answer would be 'd'.

hope this !