Answer the following question given this paragraph: Each step in the process is either a gain of oxygen or a loss of hydrogen. Each step also releases energy, which explains why the complete combustion of alkanes to carbon dioxide is an extremely exothermic reaction. Q: The complete combustion of alkanes to carbon dioxide is an extremely __________ reaction. Choices: - hydrolic - geothermal - reactive - exothermic A:
exothermic
Answer the following question given this paragraph: Only certain types of base pairing are allowed. For example, a certain purine can only pair with a certain pyrimidine. This means A can pair with T, and G can pair with C, as shown in Figure 3.33. This is known as the base complementary rule. In other words, the DNA strands are complementary to each other. If the sequence of one strand is AATTGGCC, the complementary strand would have the sequence TTAACCGG. During DNA replication, each strand is copied, resulting in a daughter DNA double helix containing one parental DNA strand and a newly synthesized strand. Q: A, t, g, and c pairs are associated with what substance that is important in genetics? Choices: - plasma - bacteria - blood - dna A:
dna
Q: Answer the following question given this paragraph: Q: What do you call a substance that cannot be broken down to other substances by chemical reactions.? Choices: - a participate - a molecule - a compound - an element A:
A: an element
Question: Answer the following question given this paragraph: Precipitation is water that falls from clouds. It may fall as liquid or frozen water. Types of frozen precipitation include snow, sleet, freezing rain, and hail. Q: What is the term for water that falls from clouds? Choices: - lightning - atmosphere - wind - precipitation A:
Answer: precipitation
*Question*
Answer the following question given this paragraph: Consider the ramp in Figure below . It's easier to push the heavy piece of furniture up the ramp to the truck than to lift it straight up off the ground. However, pushing the furniture over the surface of the ramp creates a lot of friction. Some of the force applied to moving the furniture must be used to overcome the friction. It would be more efficient to use a dolly on wheels to roll the furniture up the ramp. That's because rolling friction is much less than sliding friction. As a result, the efficiency of the ramp would be greater with a dolly. Q: What does pushing an object over the surface of a ramp cause? Choices: - Acceleration - vibration - tension - friction A:
**Answer**
friction
Answer the following question given this paragraph: Most sedimentary rocks form from sediments. Sediments are small pieces of other rocks, like pebbles, sand, silt, and clay. Sedimentary rocks may include fossils. Fossils are materials left behind by once-living organisms. Fossils can be pieces of the organism, like bones. They can also be traces of the organism, like footprints. Q: What is the term for something left behind by once-living organisms? Choices: - decay - waste matter - deposits - fossils A:
fossils