Sound waves travel through air in a pattern of squeezing in and spreading out.
true
false

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Increasing the pressure on one spot of a fluid will increase the pressure everywhere else in the fluid a. pascals principal b. archimedes' principal c. bernoulli's principal