Answer the following question given this paragraph: Scientists make many measurements during experiments. Humans and equipment can make mistakes. Errors are often unavoidable. This is called experimental error . Errors may be due to the equipment being used. In this case, the numbers may be always skewed in one direction. For example, a scale may always measure one-half of an ounce high. People can also make errors. A measurement may not be made precisely. For example, a stopwatch may be stopped too soon or too late. But probably not always in the same direction. To correct for this, many measurements are taken. The measurements are then averaged. Experiments always have a margin of error associated with them. Q: How do you decrease errors in an experiment? Choices: - write about it - ask God - decrease measurements - take many measurements A:
take many measurements
(Question)
Answer the following question given this paragraph: A mutation is a change in the base sequence of DNA or RNA. Environmental causes of mutations are called mutagens. The effects of a mutation depend on the type of mutation and whether it occurs in a gamete or body cell. Q: What is the term for environmental causes of mutations? Choices: - pollutants - catalysts - carcinogens - mutagens A:
(Answer)
mutagens
Ques: Answer the following question given this paragraph: Figure 32.19 Nuclear fusion in the Sun converts hydrogen nuclei into helium; fusion occurs primarily at the boundary of the helium core, where temperature is highest and sufficient hydrogen remains. Energy released diffuses slowly to the surface, with the exception of neutrinos, which escape immediately. Energy production remains stable because of negative feedback effects. Q: What process converts the sun's hydrogen nuclei into helium? Choices: - solar fission - nuclear fission - combustion - nuclear fusion A:
Ans: nuclear fusion
(Q).
Answer the following question given this paragraph: 34.3 Vertebrates are craniates that have a backbone. Q: What type of craniates have backbones? Choices: - juveniles - invertebrates - larva - vertebrates A:
(A).
vertebrates
Ques:Answer the following question given this paragraph: Q: What do some plants produce that protects dormant seeds and aids in their dispersal? Choices: - roots - leaves - stems - fruit A:

Ans:fruit
Answer the following question given this paragraph: Pollutants that enter an aquifer spread outward from the source. They spread in the direction the water is moving. Q: Which direction from the source do pollutants in an aquifer spread? Choices: - southward - forward - inward - outward A:
outward