Answer the following question given this paragraph: Unsafe water supplies have drastic effects on human health. Waterborne diseases are diseases due to microscopic pathogens in fresh water. These diseases can be caused by protozoa, viruses, bacteria, and intestinal parasites. In many parts of the world there are no water treatment plants. If sewage or animal manure gets into a river, then people downstream will get sick when they drink the water. According to the World Health Organization (WHO), diarrheal disease is responsible for the deaths of 1.8 million people every year. It was estimated that 88% of the cases of diarrheal disease are caused by unsafe water supplies. Q: What type of contamination causes almost 90% of diarrheal disease worldwide? Choices: - air contamination - ground contamination - food contamination - water supply contamination A:
water supply contamination
(Question)
Answer the following question given this paragraph: Diffusion will continue until the concentration gradient has been eliminated. Since diffusion moves materials from an area of higher concentration to the lower, it is described as moving solutes "down the concentration gradient. " The end result of diffusion is an equal concentration, or equilibrium , of molecules on both sides of the membrane. At equilibrium, movement of molecules does not stop. At equilibrium, there is equal movement of materials in both directions. Q: The end result of diffusion is an equal concentration, or equilibrium , of molecules on both sides of what? Choices: - the cell - the organism - the organelle - the membrane A:
(Answer)
the membrane
Ques: Answer the following question given this paragraph: Decomposers release nutrients when they break down dead organisms. Q: What do decomposers release when they break down dead organisms? Choices: - methane - carbon dioxide - acids - nutrients A:
Ans: nutrients
(Q).
Answer the following question given this paragraph: Matter has both physical and chemical properties. Physical properties can be measured or observed without matter changing to a different substance. Q: What are the two types of properties that matter has? Choices: - nature and purpose - composition and weight - size and shape - physical and chemical A:
(A).
physical and chemical
Ques:Answer the following question given this paragraph: Each type of electromagnetic radiation has a characteristic range of wavelengths. The longer the wavelength (or the more stretched out it appears), the less energy is carried. Short, tight waves carry the most energy. This may seem illogical, but think of it in terms of a piece of moving rope. It takes little effort by a person to move a rope in long, wide waves. To make a rope move in short, tight waves, a person would need to apply significantly more energy. The sun emits (Figure 5.10) a broad range of electromagnetic radiation, including X-rays and ultraviolet (UV) rays. The higher-energy waves are dangerous to living things; for example, X-rays and UV rays can be harmful to humans. Q: Each type of electromagnetic radiation has a characteristic range of wavelengths. the longer the wavelength (or the more stretched out it appears), the less energy is carried. short, tight waves carry what? Choices: - kinetic energy - heat - sound - most energy A:

Ans:most energy
Question: Answer the following question given this paragraph: Bird beaks are generally adapted for the food they eat. For example, the sharp, hooked beak of a raptor is well suited for killing and tearing apart prey. The long beak of the hummingbird in Figure below co-evolved with the tube-shaped flowers from which it sips nectar. Q: What part of a bird is adapted for the food it eats? Choices: - teeth - head - eye - beak A:
Answer:
beak