Answer the following question given this paragraph: To physically limit radiation doses, we use shielding, increase the distance from a source, and limit the time of exposure. Figure 32.10 illustrates how these are used to protect both the patient and the dental technician when an x-ray is taken. Shielding absorbs radiation and can be provided by any material, including sufficient air. The greater the distance from the source, the more the radiation spreads out. The less time a person is exposed to a given source, the smaller is the dose received by the person. Doses from most medical diagnostics have decreased in recent years due to faster films that require less exposure time. Q: Shielding should be used when receiving x-rays to limit exposure to what potentially harmful form of energy? Choices: - pollution - convection - evaporation - radiation A:
radiation
(Question)
Answer the following question given this paragraph: Secondary pollutants form from primary pollutants. Many occur as part of photochemical smog . This type of smog is seen as a brown haze in the air. Photochemical smog forms when certain pollutants have a chemical reaction in the presence of sunlight. Photochemical smog consists mainly of ozone (O 3 ). Ozone near the ground is a pollutant ( Figure below ). This ozone is harmful to humans and other living things. However, ozone in the stratosphere protects Earth from the Sun's harmful ultraviolet radiation. Q: Photochemical smog consists mainly of what? Choices: - acid - oxygen - carbon - ozone A:
(Answer)
ozone
Ques: Answer the following question given this paragraph: An electric field is a space surrounding a charged particle where the particle exerts electric force. Q: What does an electric field surround? Choices: - neutral particles - negative particle - charged ions - a charged particle A:
Ans: a charged particle
(Q).
Answer the following question given this paragraph: Ingestive protists ingest, or engulf, bacteria and other small particles. They extend their cell wall and cell membrane around the food item, forming a food vacuole . Then enzymes digest the food in the vacuole. Q: Ingestive protists extend their cell wall and cell membrane around the food item, forming a what? Choices: - food pocket - fuel vacuole - protective bubble - food vacuole A:
(A).
food vacuole
Ques:Answer the following question given this paragraph: Q: Animals need plants for food and? Choices: - fuel - reproduction - shelter - energy A:

Ans:energy
Ques: Answer the following question given this paragraph: Encephalitis is a brain infection most often caused by viruses. The immune system tries to fight off a brain infection, just as it tries to fight off other infections. But sometimes this can do more harm than good. The immune system's response may cause swelling in the brain. With no room to expand, the brain pushes against the skull. This may injure the brain and even cause death. Medicines can help fight some viral infections of the brain, but not all infections. Q: What is most often the cause of encephalitis? Choices: - parasites - bacterial infections - calcium buildup - viruses A:
Ans:
viruses