Answer the following question given this paragraph: Moving air, like moving water, causes erosion. Moving air is called wind. Q: What is moving air called? Choices: - steam - clouds - humidity - wind A:
wind
Answer the following question given this paragraph: Arctic Tundra The Arctic tundra lies north of the subarctic boreal forests and is located throughout the Arctic regions of the Northern Hemisphere (Figure 20.18). Tundra also exists at elevations above the tree line on mountains. The average winter temperature is 34C (29.2F) and the average summer temperature is 3C12C (37F 52F). Plants in the Arctic tundra have a short growing season of approximately 5060 days. However, during this time, there are almost 24 hours of daylight and plant growth is rapid. The annual precipitation of the Arctic tundra is low (1525 cm or 610 in) with little annual variation in precipitation. And, as in the boreal forests, there is little evaporation because of the cold temperatures. Plants in the Arctic tundra are generally low to the ground and include low shrubs, grasses, lichens, and small flowering plants (Figure 20.26). There is little species diversity, low net primary productivity, and low aboveground biomass. The soils of the Arctic tundra may remain in a perennially frozen state referred to as permafrost. The permafrost makes it impossible for roots to penetrate far into the soil and slows the decay of organic matter, which inhibits the release of nutrients from organic matter. The melting of the permafrost in the brief summer provides water for a burst of productivity while temperatures and long days permit it. During the growing season, the ground of the Arctic tundra can be completely covered with plants or lichens. Q: Why is there very little evaporation in the boreal forests? Choices: - too hot - too humid - high elevation - temperature is too cold A:
temperature is too cold
Q: Answer the following question given this paragraph: Outdoor air pollution is made of chemical particles. When smoke or other pollutants enter the air, the particles found in the pollution mix with the air. Air is polluted when it contains many large toxic particles. Outdoor air pollution changes the natural characteristics of the atmosphere. Primary pollutants are added directly to the atmosphere. Fires add primary pollutants to the air. Particles released from the fire directly enter the air and cause pollution ( Figure below ). Burning of fossil fuels such as oil and coal is a major source of primary pollutants ( Figure below ). Q: A major source of primary pollutants is the burning of oil and coal, which are types of what? Choices: - erosion fuels - renewable fuels - greenhouse gases - fossil fuels A:
A: fossil fuels
Question: Answer the following question given this paragraph: We obviously can't live without plants, but sometimes they cause us problems. Many plants are weeds. Weeds are plants that grow where people don't want them, such as gardens and lawns. They take up space and use resources, hindering the growth of more desirable plants. People often introduce plants to new habitats where they lack natural predators and parasites. The introduced plants may spread rapidly and drive out native plants. Many plants produce pollen, which can cause allergies. Plants may also produce toxins that harm human health (see Figure below ). Q: What are plants that grow where people don't want them to and can take up space and use resources which hinders growth of more desirable plants? Choices: - native plants - shrubs - grasses - weeds A:
Answer: weeds
*Question*
Answer the following question given this paragraph: Q: Corals build hard exoskeletons that grow to become what? Choices: - algae - stability reefs - fungi - coral reefs A:
**Answer**
coral reefs
(Q).
Answer the following question given this paragraph: Q: What type of behaviors are triggered by pheromones in moths? Choices: - exhibit - illuminating - peculiar - courtship A:
(A).
courtship