Answer the following question given this paragraph: Optical telescopes are designed to collect visible light. The two types of optical telescopes are reflecting telescopes and refracting telescopes. Q: What are the two types of optical telescopes? Choices: - reflecting and recapitulating - reflecting and layering - refracting and compound - reflecting and refracting A:
reflecting and refracting
Answer the following question given this paragraph: The troposphere is the lowest layer of the atmosphere. All of the air you breathe is in the troposphere. All of Earth's weatherwind, rain, snow, heatis in the troposphere. The troposphere is the lowest and most important layer of the atmosphere!. Q: What is the lowest layer of the atmosphere? Choices: - ionosphere - chromosphere - lithosphere - troposphere A:
troposphere
Q: Answer the following question given this paragraph: The nucleus is the largest organelle in a eukaryotic cell and contains most of the cell's DNA. Other organelles in eukaryotic cells include the mitochondria, endoplasmic reticulum, ribosomes, Golgi apparatus, vesicles, vacuoles, and centrioles (in animal cells only). Each type of organelle has important functions in the cell. Q: What is the largest organelle in a eukaryotic cell? Choices: - epidermis - cortex - apoptosis - nucleus A:
A: nucleus
Question: Answer the following question given this paragraph: In the Bohr model, the atom is viewed as a densely packed nucleus comprised of neutrons and protons that is surrounded by electrons at fixed distances, which correspond to specific energy levels. However, the quantum model showed that the distances between electrons and the nucleus are not really fixed. Due to their wave-like nature, we cannot pinpoint the exact location of an electron that is in motion, but we can determine the probability that a given electron will be in a particular region in three-dimensional space. Schrdinger's equations are used to determine the position of a specific electron with respect to a nearby nucleus. The region in space in which an electron is most likely to be found is referred to as an orbital . Q: Which atomic model shows that the distances of electrons from the nucleus is not a fixed value? Choices: - the electron model - the distance model - the equivocation model - the quantum model A:
Answer: the quantum model
*Question*
Answer the following question given this paragraph: Isotopes are atoms of the same element that have different masses. Q: Atoms of the same element that have different masses are called what? Choices: - variations - radioactive - mutations - isotopes A:
**Answer**
isotopes
(Q).
Answer the following question given this paragraph: Accuracy and Precision of a Measurement Science is based on observation and experimentthat is, on measurements. Accuracy is how close a measurement is to the correct value for that measurement. For example, let us say that you are measuring the length of standard computer paper. The packaging in which you purchased the paper states that it is 11.0 inches long. You measure the length of the paper three times and obtain the following measurements: 11.1 in. , 11.2 in. , and 10.9 in. These measurements are quite accurate because they are very close to the correct value of 11.0 inches. In contrast, if you had obtained a measurement of 12 inches, your measurement would not be very accurate. The precision of a measurement system is refers to how close the agreement is between repeated measurements (which are repeated under the same conditions). Consider the example of the paper measurements. The precision of the measurements refers to the spread of the measured values. One way to analyze the precision of the measurements would be to determine the. Q: How close a measurement is to the correct value for that measurement is known as what? Choices: - frequency - rate - temperature - accuracy A:
(A).
accuracy