Answer the following question given this paragraph: Courtesy of the U. S. EPA. Nitrogen and sulfur oxides combine with rain to form acid rain . Public Domain. Q: What combines with rain to form acid rain? Choices: - suction and sulfur oxides - compost and sulfur oxides - carbon dioxide and sulfur oxides - nitrogen and sulfur oxides A:
nitrogen and sulfur oxides
Answer the following question given this paragraph: Alloys are mixtures of materials, at least one of which is a metal. Q: Mixtures of materials called alloys contain at least one of what type of material? Choices: - coal - liquid - steel - metal A:
metal
Q: Answer the following question given this paragraph: A radioisotope has atoms with unstable nuclei. Unstable nuclei naturally decay, or break down. They lose energy and particles and become more stable. As nuclei decay, they gain or lose protons, so the atoms become different elements. This is illustrated in the Figure below . The original, unstable nucleus is called the parent nucleus. After it loses a particle (in this case a type of particle called an alpha particle), it forms a daughter nucleus, with a different number of protons. Q: What has atoms with unstable nuclei? Choices: - hydrocarbon - microwaves - radionuclide - radioisotope A:
A: radioisotope
Question: Answer the following question given this paragraph: Most fungi are multicellular, but some exist as single cells. Fungi spend most of their life cycle in the haploid state. They form diploid cells only during sexual reproduction. Like the cells of protists and plants, the cells of fungi have cell walls. But fungi are unique in having cell walls made of chitin instead of cellulose. Chitin is a tough carbohydrate that also makes up the exoskeleton (outer skeleton) of insects and related organisms. Q: What type of state do most fungi spend their lives in? Choices: - triploid - meiosis - diploid - haploid A:
Answer: haploid
*Question*
Answer the following question given this paragraph: Two factors that affect the pressure of fluids are depth and density. This explains why water pressure is greater deeper in the ocean and air pressure is greatest at sea level. Denser fluids, such as water, exert more pressure than less dense fluids, such as air. Q: What are the two factors that affect the pressure of fluids? Choices: - viscosity and gravity - momentum and density - depth and decrease - depth and density A:
**Answer**
depth and density
Q: Answer the following question given this paragraph: A geologic map shows the different rocks that are exposed at the surface of a region. Rock units are shown in a color identified in a key. On the geologic map of the Grand Canyon, for example, different rock types are shown in different colors. Some people call the Grand Canyon "layer cake geology" because most of the rock units are in layers. Rock units show up on both sides of a stream valley. Q: What are the three main types of rocks? Choices: - limestone , igneous and metamorphic - plutonic, igneous and metmorphic - crystalline , igneous and metamorphic - sedimentary, igneous and metamorphic A:
A: sedimentary, igneous and metamorphic