Answer:
develops a geocentric model that has the planets moving around the Earth. However, in order to account for retrograde motion, he put the planets on circles that move in circles. * Copernicus suggests a heliocentric model. His model has the planets moving around the Sun in circular orbits.
Explanation:
Answer:
Internal validity.
Explanation:
Internal validity is the study in which trust relationship is build between treatment and outcome. This relationship is known as <em>cause-and-effect. </em>
In this type research, the studies are based on whether the finding is questionable or not. The research which can overrule the possibility of alternative explanations of our findings is internally valid.
The threats of internal valid study are:
- <u>Natural Improvement </u>
- <u>Maturation</u>
- <u>Historical Events</u>
- <u>Placebo effects</u>
- <u>Nonspecific effects</u>.
So, the correct answer is 'Internal validity'.
in the blank you would put “conflicts with”
Answer:D
Explanation: In 1619, brought by English privateers who had seized them from a captured Portuguese slave ship.
Answer: go up
Explanation:
because of global warming