Q: What type of roads and parking lots prevent rainwater from soaking into the ground? Read this paragraph and choose the correct option from the provided answers: Paved roads and parking lots prevent rainwater from soaking into the ground. This increases runoff and the potential for soil erosion. Choices: - gravel - shaded - dirt - paved A:
paved

Q: Liquefaction ccurs when the molecules of a gas are cooled to the point where they no longer possess sufficient kinetic energy to overcome what? Read this paragraph and choose the correct option from the provided answers: Liquefaction of Gases Liquefaction of gases is the condensation of gases into a liquid form, which is neither anticipated nor explained by the kinetic molecular theory of gases. Both the theory and the ideal gas law predict that gases compressed to very high pressures and cooled to very low temperatures should still behave like gases, albeit cold, dense ones. As gases are compressed and cooled, however, they invariably condense to form liquids, although very low temperatures are needed to liquefy light elements such as helium (for He, 4.2 K at 1 atm pressure). Liquefaction can be viewed as an extreme deviation from ideal gas behavior. It occurs when the molecules of a gas are cooled to the point where they no longer possess sufficient kinetic energy to overcome intermolecular attractive forces. The precise combination of temperature and pressure needed to liquefy a gas depends strongly on its molar mass and structure, with heavier and more complex molecules usually liquefying at higher temperatures. In general, substances with large van der Waals acoefficients are relatively easy to liquefy because large a coefficients indicate relatively strong intermolecular attractive interactions. Conversely, small molecules with only light elements have small a coefficients, indicating weak intermolecular interactions, and they are relatively difficult to liquefy. Gas liquefaction is used on a massive scale to separate O2, N2, Ar, Ne, Kr, and Xe. After a sample of air is liquefied, the mixture is. Choices: - intermolecular gravitational forces - gravitational attractive forces - bonding attractive forces - intermolecular attractive forces A:
intermolecular attractive forces

Q: Q: How many pairs of chromosomes are in the human genome? Read this paragraph and choose the correct option from the provided answers: The human genome has 23 pairs of chromosomes located in the nucleus of somatic cells. Each chromosome is composed of genes and other DNA wound around histones (proteins) into a tightly coiled molecule. Choices: - 21 - 24 - 13 - 23 A:
A: 23

Question: Q: Where do radio waves lie on the electromagnetic spectrum? Read this paragraph and choose the correct option from the provided answers: Courtesy of NASA. Radio waves lie at the far left of the electromagnetic spectrum . Public Domain. Choices: - middle - far right - top - far left A:
Answer: far left

*Question*
Q: What are plants called that grow where you don't want them? Read this paragraph and choose the correct option from the provided answers: 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 ). Choices: - grasses - shrubs - reeds - weeds A:
**Answer**
weeds

Q: Q: What two basic types of feather does a bird have? Read this paragraph and choose the correct option from the provided answers: Feathers help birds fly and also provide insulation and serve other purposes. Birds actually have two basic types of feathers: flight feathers and down feathers. Both are shown in Figure below . Flight feathers are long, stiff and waterproof. They provide lift and air resistance without adding weight. Down feathers are short and fluffy. They trap air next to a bird's skin for insulation. Choices: - carrying and down - up and down - flight and landing - flight and down A:
A: flight and down