Global air circulation cells move air
choose all that apply
from low pressure to high pressure
clockwise in the northern hemisphere and counterclockwise in the southern hemisphere
from the equator to the poles
in different directions at different latitudes
randomly

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

Use the drop-down menus to match each part of the scenario to the correct scientific practice. akira records the speed of a reaction without a catalyst and then with a catalyst. akira creates a reaction without a catalyst and repeats the reaction with a catalyst. akira turns in a written lab report to his science teacher. akira wonders, "will adding a catalyst speed up this chemical reaction? " akira writes in his notes that adding a catalyst sped up the chemical reaction because the catalyst lowers the activation energy needed to get the reaction started.

Which kind of electrical charge is found on a hydrogen atom of a polar water molecule