Science TEAS Practice Test

Correct Answer: B

Rationale: The correct answer is B: Quantitative data is more accurate than qualitative data. This statement is false because the accuracy of data depends on the research question and the methodology used, not on whether it is qualitative or quantitative. Both types of data have their strengths and limitations. Quantitative data is numerical and lends itself to statistical analysis, but it can lack depth and context. Qualitative data, on the other hand, provides rich insights into perspectives and behavior but may be subjective. Therefore, it is essential to use both types of data in scientific research to gain a comprehensive understanding of a research problem.

Correct Answer: A

Rationale: The correct answer is A: Phenotype. Phenotype refers to the physical and visible expression of a genetic trait. It includes observable characteristics like eye color, height, and hair texture. This is different from genotype, which represents the genetic makeup of an organism. Allele refers to different forms of a gene, and gamete is a reproductive cell. Thus, in this context, phenotype best describes the physical manifestation of a genetic trait, making it the correct answer.

Correct Answer: B

Rationale: The correct answer is B: Thymine. Thymine is a nucleobase that exists in DNA, not RNA. RNA contains Uracil instead of Thymine. This is due to a different chemical structure in RNA which lacks the methyl group present in Thymine. Uracil pairs with Adenine in RNA, while Thymine pairs with Adenine in DNA. Choices A, C, and D (Uracil, Cytosine, Guanine) are all nucleobases found in RNA, making them incorrect answers.

Correct Answer: B

Rationale: The correct answer is B, "Most of them are gases at room temperature." Metals are typically solid at room temperature, not gases. This is because metals have high melting points due to their metallic bonding structure. Choice A is true as most metals are good conductors of heat due to the free movement of electrons. Choice C is also true, as metals are ductile and can be drawn into wires. Choice D is incorrect, as metals do not make up the majority of elements on the periodic table. Nonmetals, metalloids, and noble gases also exist.

Correct Answer: B

Rationale: To calculate the grams of CaCO3 needed, we first find the molar mass of CaCO3: 40.07 (Ca) + 12.01 (C) + (15.99 x 3) (O) = 100.08 g/mol. Next, use the formula: grams = moles x molar mass. Moles = 0.35 M x 0.6 L = 0.21 moles. Therefore, grams = 0.21 moles x 100.08 g/mol = 21.02 g. Hence, the correct answer is B: 19.7 g. Other choices are incorrect due to miscalculation or incorrect conversion.