Answer the following question given this paragraph: An acid also produces negative ions, and a base also produces positive ions. For example, the acid hydrogen chloride (HCl), when dissolved in water, produces negative chloride ions (Cl - ) as well as hydrogen ions. The base sodium hydroxide (NaOH) produces positive sodium ions (Na + ) in addition to hydroxide ions. These other ions also combine when the acid and base react. They form sodium chloride (NaCl). This is represented by the equation:. Q: When dissolved in water, the base sodium hydroxide (naoh) produces sodium ions with what charge? A:
OPTIONS:
- constant
- similar
- negative
- positive
positive
--
Answer the following question given this paragraph: Gravity is responsible for erosion by flowing water and glaciers. That's because gravity pulls water and ice downhill. These are ways gravity causes erosion indirectly. But gravity also causes erosion directly. Gravity can pull soil, mud, and rocks down cliffs and hillsides. This type of erosion and deposition is called mass wasting . It may happen suddenly. Or it may occur very slowly, over many years. Q: What force is responsible for erosion by flowing water and glaciers? A:
OPTIONS:
- kinetic
- electromagnetic
- weight
- gravity
gravity
--
Answer the following question given this paragraph: The main function of the cardiovascular system is transporting substances around the body. Figure above shows some of the substances that are transported in the blood. They include hormones, oxygen, nutrients from digested food, and cellular wastes. Transport of all these materials is necessary to maintain homeostasis of the body and life itself. Q: What is the main function of the cardiovascular system? A:
OPTIONS:
- respiration of air
- excretion of food waste
- coordinate bones and muscles
- transporting substances around the body
transporting substances around the body
--
Answer the following question given this paragraph: Figure 39.9 The trachea bifurcates into the right and left bronchi in the lungs. The right lung is made of three lobes and is larger. To accommodate the heart, the left lung is smaller and has only two lobes. Q: What bifurcates into the right and left bronchi in the lungs? A:
OPTIONS:
- neck
- aorta
- cornea
- trachea
trachea
--