Astronauts who traveled to the moon were able to float slightly asthey walked along its surface. why were the astronauts able to do this?

Which of the following protists gets nutrients mainly by absorbing molecules from other organisms through their cell walls and cell membranes? a. amoebas b. water molds c. ciliates d. slime molds

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?