Q: Answer the following question given this paragraph:   Figure 22.24 The Van Allen radiation belts are two regions in which energetic charged particles are trapped in the Earth’s magnetic field. One belt lies about 300 km above the Earth’s surface, the other about 16,000 km. Charged particles in these belts migrate along magnetic field lines and are partially reflected away from the poles by the stronger fields there. The charged particles that enter the atmosphere are replenished by the Sun and sources in deep outer space.   Q: The van allen radiation belts are two regions in which energetic charged particles are trapped in earth’s what?   A:

A: magnetic field


Q: Answer the following question given this paragraph:   When nonmetals react with one another, the product is a molecular compound. Often, the nonmetal reactants can combine in different ratios and produce different products. Sulfur can also combine with oxygen to produce sulfur trioxide.   Q: Sulfur can combine with oxygen to produce what?   A:

A: sulfur trioxide


Q: Answer the following question given this paragraph:   Sponges are filter feeders. They pump water into their body through their pores. The water flows through a large central cavity called the spongocoel (see Figure above ). As the water flows by, specialized collar cells filter out food particles such as bacteria. Collar cells have tiny hairs that trap the particles. They also have a flagellum that whips the water and keeps it moving. Once the food is trapped, the collar cells digest it (see Figure below ). Cells called amebocytes also help digest the food. They distribute the nutrients to the rest of the body as well. Finally, the water flows back out of the body through an opening called the osculum. As water flows through the sponge, oxygen diffuses from the water to the sponge’s cells. The cells also expel wastes into the water for removal through the osculum.   Q: Filter feeders, such as sponges, pump water into their body through what structures?   A:

A: pores


Q: Answer the following question given this paragraph:   type of protozoa, such as Giardia, that moves with flagella.   Q: Giardia is an example of a protozoa that uses flagella for what purpose?   A:

A: