Preoperational thinker Blake has edged his way close to the top rim of the Grand Canyon. His mother then asks him, "What do you think someone at the bottom of the canyon looking up would see?" Given the egocentric nature of his thought, Blake’s most likely response would be

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

Which of the following are not included as modern mammals that evolved during the eocene epoch? primates artiodactyls perissodactyls none of the above