(Q).
Q: What type of waves travel through the body of a planet?   Read this paragraph and choose the correct option from the provided answers:  Body waves travel through the body of a planet. Surface waves travel along the surface.   Choices:  - vacuum waves  - gas waves  - energy waves  - body waves   A:
(A).
body waves


(Q).
Q: The kidneys help control acid-base balance by excreting _____ and generating bicarbonate that helps maintain blood plasma ph within a normal range?   Read this paragraph and choose the correct option from the provided answers:  Buffer Systems in the Body The buffer systems in the human body are extremely efficient, and different systems work at different rates. It takes only seconds for the chemical buffers in the blood to make adjustments to pH. The respiratory tract can adjust the blood pH upward in minutes by exhaling CO2 from the body. The renal system can also adjust blood pH through the excretion of hydrogen ions (H+) and the conservation of bicarbonate, but this process takes hours to days to have an effect. The buffer systems functioning in blood plasma include plasma proteins, phosphate, and bicarbonate and carbonic acid buffers. The kidneys help control acid-base balance by excreting hydrogen ions and generating bicarbonate that helps maintain blood plasma pH within a normal range. Protein buffer systems work predominantly inside cells.   Choices:  - magnesium ions  - sodium ions  - lithium ions  - hydrogen ions   A:
(A).
hydrogen ions


(Q).
Q: Weathering is fundamental to the creation of what, which exists as a very thin layer over solid rock?   Read this paragraph and choose the correct option from the provided answers:  Without weathering, we would not have any soil on Earth. People could not live on Earth without soil! Your life and the lives of most organisms depend on soil. Soil is only a very thin layer over solid rock. Yet, it is the place where reactions between solid rock, liquid water and air take place. We get wood, paper, cotton, medicines, and even pure water from soil. So soil is a very important resource. Our precious soil needs to be carefully managed and cared for. If we don’t take care of the soil we have, we may not be able to use it in the future.   Choices:  - fungus  - moss  - aquifers  - soil   A:
(A).
