Chemestry: Chapter One Concept Review HW

A well-tested explanation for a broad set observations is... A. Hypothesis. B. Experiment. C. Theory D. Experiment.

C. Theory

To which of the following might a hypothesis be elevated after repeated experimentation? A. Observation. B. Scientific Law. C. Theory. D. Experiment.

C. Theory.

Identify the FALSE statement. A. A scientific law fully explains a set observations. B. The scientific method is a logical, systematic approach to the solution of a problem. C. For the results of an experiment to be accepted, the experiment must produce the same results no matter how many times it's repeated.

A. A scientific law fully explains a set observations.

Which of these steps of the scientific method involves starting a relationship but not but not purposing an explanation for the relationship? A. Observation. B. Scientific Law. C. Theory. D. Hypothesis.

A. Observation.

Your friend makes the statement that "Water boils at a higher temperature than ethanol." How would you classify this statement? A. Observation. B. Scientific Law. C. Theory. D. Experiment.

A. Observation.

A hypothesis is... A. An observation recorded from an experiment. B. A proposed explanation for what is observed. C. A summary of the results of many experiments. D. A well-tested explanation for many observations.

B. A proposed explanation for what is observed.

Identify the FALSE statement. A. Some moon rocks formed from volcanic material. B. Analysis of sunlight indicates the presence of oxygen on the sun's surface. C. A robotic vehicle delivered to the surface of mars analyzed and determined the chemical composition of Mars rocks. D. The composition of rocks and soil indicates that a large amount of water once existed on the surface of Mars.

B. Analysis of sunlight indicates the presence of oxygen on the sun's surface.

Identify the FALSE statement. A. Chemistry plays an important role in efforts to increase the world's food supply and to protect crops. B. Biodiesel is a fossil fuel. C. Potato plants with a jellyfish gene will glow when they need to be watered. D. Chemists are working to develop more pest-resistant and disease-resistant plants.

B. Biodiesel is a fossil fuel.

Which of the following is NOT a step for solving a numeric word problem? A. Calculate. B. Conclude. C. Analyze. D. Evaluate.

B. Conclude.

Select the group of materials that weren't developed by chemists. A. Nylon, silk, cotton. B. Cotton, silk, wool. C. Wool, silk, nylon. D. Cotton, nylon, wool.

B. Cotton, silk, wool.

Which of the following is NOT a step for solving numeric word problems? A. Evaluate. B. Observe. C. Calculate. D. Analyze.

B. Observe.

Which of the following would most likely be an organic substance? A. A chemical containing oxygen. B. A chemical containing hydrogen. C. A chemical containing carbon. D. A chemical containing nitrogen.

C. A chemical containing carbon.

Which of the following tasks would probably not be assigned to an analytical chemist? A. Determine the amount of copper in a sample. B. Determine the amount of lead in a blood sample. C. Determine the least expensive method to produce nylon. D. Determine the amount of pollutant in a local lake.

C. Determine the least expensive method to produce nylon.

A biochemist might... A. Determine the amount of energy released when a fossil fuel burns. B. Design a method to speed up the production of a metal from its ore. C. Identify the genes that control the production of insulin. D. Determine how much table salt will dissolve in a liter of water.

C. Identify the genes that control the production of insulin.

Which of these chemicals is definitely inorganic? A. One that is made of carbon and hydrogen. B. One that is made of nitrogen and carbon. C. One that is made of nitrogen and hydrogen. D. One that is made of carbon and oxygen.

C. One that is made of nitrogen and hydrogen.

Which of the following is NOT a part of the scientific method? A. Experimenting. B. Observing. C. Proving. D. Hypothesizing.

C. Proving.

Identify the activity that belongs in the field of chemistry. A. Developing Medicines B. Analysis of a compound C. Production of a new plastic D. All of the above

D. All of the above.

Which of the following is NOT step for solving numeric word problems? A. Find new sources of energy. B. Develop new ways of conserving energy. C. Develop new batteries for electric cars. D. All of the above.

D. All of the above.