Question 1

What kind of astronomical object is hundreds of millions of times smaller than the Milky Way galaxy?

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Question 2

In the simplest form of the scientific method,which of the following correctly describes the sequence in which science proceeds?

Accepted Answer

The scientific method typically proceeds with observation of a phenomenon or problem, followed by the formation of a hypothesis to explain the observation. An experiment is then designed to test the hypothesis, and the results of the experiment are analyzed to determine whether they support or reject the hypothesis. Therefore, the correct sequence is observation, hypothesis, experiment. Choice D correctly represents this sequence.

Question 3

Suppose a galaxy contains 10 billion stars.During a collision with another galaxy,400 million of those stars are stripped away.How many stars remain inside the first galaxy? Express your answer in standard scientific notation.

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Question 4

Science and organized religion:

Accepted Answer

While science and religion may have some fundamental disagreements, they often share similar motivations, such as exploring the nature of the universe and the meaning of life. Many scientists are also religious, and many religious people accept scientific findings. Therefore, C is the best choice. A and B are incorrect because science and religion are not always either in agreement or at odds with each other. D is incorrect because science and religion each have their own unique methodology.

Question 5

How many seconds have elapsed since the family Hominidae (including the great apes)first appeared on Earth,20 million years ago? Express your answer in standard scientific notation.(Hint: There are 31.6 million seconds per year.)

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Question 6

Sally Scientist is conducting research into the rates at which birds flap their wings (or "flap rate"),which she notices varies between bird species.How might her research best proceed,according to the scientific method?

Accepted Answer

In order to conduct research according to the scientific method, Sally should start with a hypothesis that can be tested through experimentation. She should then design and conduct an experiment to measure flap rate under controlled conditions, while varying the weight of the birds. She should collect and analyze data from the experiment to determine if there is a correlation between weight and flap rate, and report her results. Option A is somewhat similar, but Sally should also test her model through the experiment rather than just constructing it. Option C is more of an observational study, which is not as strong as an experimental study, and does not involve manipulating variables like weight. Option D only identifies the highest flap rate and does not involve testing any hypotheses or conducting experiments.

Question 7

Which of the following is a necessary part of a good scientific theory?

Accepted Answer

A necessary part of a good scientific theory is that it must be well-tested through rigorous experimentation and observation. This helps to ensure that the theory is reliable and supported by evidence. The other options (B, C, and D) are not necessarily required for a theory to be considered good or valid. A theory may be revolutionary, but this is not a requirement for it to be good. A theory may be mathematical, but this is not necessary for all scientific theories. A theory may be intuitive, but this is subjective and may vary depending on the individual.

Question 8

A scientific theory is a(n):

Accepted Answer

A scientific theory is a well-established and well-tested physical explanation.

Question 9

Which of the following statements uses the word theory in the sense meant by scientists?

Accepted Answer

Scientists use the word theory to refer to a well-substantiated explanation of certain aspects of the natural world that is repeatedly confirmed through experimentation and observation. Option B indicates that the astronomer's theory has been tested and accepted within the scientific community, making it an appropriate use of the term theory. Options A, C, and D suggest varying degrees of untested or unconfirmed explanations, which do not meet the scientific definition of a theory.

Question 10

On scales of about one-billionth of a meter,what is the fundamental building block of matter?

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Question 11

Scientific advances are directly responsible for which of the following problems facing humanity?

Accepted Answer

Scientific advances have led to the increased use of fossil fuels and technological innovations that contribute to pollution and greenhouse gas emissions that cause climate change. Therefore, all of the given problems facing humanity are directly or indirectly related to scientific advances.

Question 12

According to present estimates,the Universe is roughly 14 billion years old,while stars slightly more than 10 times more massive than our Sun live for only 7 million years.How many generations of such stars could there have been over the history of the Universe? Express your answer in standard scientific notation.

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Question 13

The distance from one chair to another in a typical classroom is about one meter.By increasing the order of magnitude one step at a time,provide familiar examples for length scales from one meter up to 10⁶ meters.

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Question 14

The distance between stars near the Sun is typically about 10¹⁶ meters.How many Earth-like planets (with diameters of about 1 million meters)would fit between stars separated by this distance?

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Question 15

Which of the following is NOT likely to be a consequence of climate change?

Accepted Answer

Climate change is caused by an increase in greenhouse gases and is expected to result in rising sea levels, changes in rainfall patterns, and changes in biological habitats. Increased solar storms are not a consequence of climate change, but rather a natural occurrence that can affect satellite communications and power grids.

Question 16

Identify the base,coefficient,and exponent in the number 4.07 × 10⁶.

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Question 17

The ancient Newgrange monument's opening pointed toward a point on the horizon somewhat south of due east.Why?

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Question 18

Einstein's explanation for gravity has been tested rigorously using several different experimental techniques.Scientists refer to it as a(n):

Accepted Answer

Einstein's explanation for gravity, known as the theory of general relativity, has been extensively tested and is widely accepted among scientists as the best explanation for gravity. A theory in scientific terms is a well-substantiated explanation of some aspect of the natural world that is based on a body of facts that have been repeatedly confirmed through observation and experiment.

Question 19

Pseudoscience refers to:

Accepted Answer

Pseudoscience refers to a belief or practice that is made to look scientific but that was not developed through the scientific method.

Question 20

Provide examples of societies that have used astronomy for survival,for creative purposes,and to explain the context of their lives.

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Quiz 1: Getting Started: Science, astronomy, and Being Human