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Terms in this set (48)A hypothesis can never be proven wrong False A theory is always true and can never be proven wrong False Theories can be tested and validated through experimentation True A scientific law is a brief statement that summarizes past observations and predicts future observations True A theory is the equivalent of an opinion False SOLID Volume: definite Shape: definite Compressible: incompressible LIQUID Volume: definite Shape: indefinite Compressible: incompressible GAS Volume: indefinite Shape: indefinite Compressible: compressible Vinegar (acetic acid in water) Mixture Silver ring Pure, Silver is only one type of substance White diamonds Pure, Diamonds are made of one substance (carbon) Sugar Water Homogenous Oil and Water Heterogeneous, There are two liquids present that do not mix. Multiple boundaries. What is another name for a homogeneous mixture? Solution Which of the following would be considered a theory? Glass is fragile. Helium balloons float because helium is less dense than air. Gasoline has a very strong odor. Hot air rises. Helium balloons float because helium is less dense than air. The key to success in chemistry is: practice. mathematical skills. curiosity. commitment. all of the above all of the above Which of the statements below is NOT part of the scientific method? observation and measurement refinement of a hypothesis as needed formation of a hypothesis testing of a hypothesis by experimentation All of the above steps are part of the scientific method. All of the above steps are part of the scientific method. Which of the following is an example of an observation? When a can of soda pop is opened, a fizzing sound is heard. All matter is composed of small, indestructible particles called atoms. Flammable objects contain phlogiston. Reactions occur due to the transfer of electrons. none of the above When a can of soda pop is opened, a fizzing sound is heard. Which statement accurately describes the purpose of experiments? Experiments are designed to produce unexplainable results for further investigation. Experiments can be replaced by a simple, logical reasoning of known facts. Experiments look for other observable predictions of a theory. Experiments are designed to produce the results predicted by a theory. none of the above Experiments look for other observable predictions of a theory Which of the following is an example of a scientific law? In a chemical reaction, matter is neither created nor destroyed. Flammable objects contain phlogiston. When a can of soda pop is opened, a fizzing sound is heard. All matter is composed of small, indestructible particles called atoms. none of the above In a chemical reaction, matter is neither created nor destroyed. What term best describes a brief statement that summarizes many past observations and predicts new ones? theory hypothesis scientific law experiment none of the above scientific law Which of the following statements about soda pop is FALSE? The carbon dioxide is forced to mix with the water by the presence of sugars. Soda pop is a chemical mixture of mostly sugar, water and carbon dioxide. When a can is opened, the pressure release allows carbon dioxide to form bubbles. The molecules important to fizzing are carbon dioxide and water. All of the above statements are true. The carbon dioxide is forced to mix with the water by the presence of sugars. Determine if the following statements are describing a scientific observation, hypothesis, theory or law: 1) Since my watch is dead, the battery might be dead 2) The air feels cool outside 3) Complex life evolved on this planet from single celled organisms 4) Matter is conserved in chemical reactions 1) Hypothesis 2) Observation 3) Theory 4) Law Which statement about the scientific method is TRUE? The scientific method emphasizes reason as the way to understand the world. The scientific method emphasizes scientific laws as the way to understand the world. The scientific method emphasizes observation and experimentation as the way to understand the world. The scientific method emphasizes observation and reason as the way to understand the world. All of the above statements are false. The scientific method emphasizes observation and experimentation as the way to understand the world. Who discovered the law of conservation of mass? Nivaldo Tro John Dalton and Antoine Lavoisier John Dalton Antoine Lavoisier none of the above Antoine Lavoisier The definition of a scientific law is: the same as a hypothesis. a number of similar observations generalized into a brief statement summarizing past observations and predicting new ones. the underlying reason for a scientific theory. a way of learning that emphasizes observation and experimentation. none of the above a number of similar observations generalized into a brief statement summarizing past observations and predicting new ones. A sample of wood with a mass of 3.0 grams was burned in an open dish. The ashes weighed 1.2 grams. What happened to the rest of the wood? The remaining mass was destroyed. Nothing, the burned wood simply has a mass of 1.2 grams. The remaining 1.8 grams was converted into heat. The remaining 1.8 grams was converted into gaseous compounds. none of the above The remaining 1.8 grams was converted into gaseous compounds. The bubbles that you feel on your tongue when you drink soda pop are due to what chemical substance? Carbon dioxide Soda contains _________ molecules that are forced into a mixture with water molecules because of the _________ pressure. Opening the can of soda will release the pressure, which allows the _________ to escape from the mixture and form bubbles Carbon dioxide Increased Carbon dioxide Scientific Method: First: Collect Data Analyze Data Confirm or revise hypothesis An example of a scientific law is the law of conservation of mass, which states that matter is neither created nor destroyed in a chemical reaction. A) True An example of a theory is modern atomic theory, which states that all matter is composed of small particles called atoms. A) True What are chemicals? Chemicals are what make up everything around us, including ourselves. Give some examples of pure chemical substances. Sugar, carbon dioxide and water. Chemistry is the science that tries to understand ______. how atoms and molecules behave What is the difference between a hypothesis and a theory? Before a scientific theory is well established, it is referred to as a hypothesis. An example of the scientific method being used from this chapter is the discovery of what happens during ________, which required proving phlogiston theory as ________ Combustion reactions Incorrect The star closest to Earth is moving away from Earth at high speed. observation A body in motion stays in motion unless acted upon by a force. law The universe began as a cosmic explosion called the Big Bang. theory A stone dropped from an altitude of 450 m falls to the ground in 9.6 s. observation How is chemistry connected to everyday life? A) Knowing some chemistry can help you make day to day decisions that affect your life. How is chemistry relevant outside the chemistry laboratory? A) chemistry is not confined to a laboratory Why does soda fizz? Soda contains carbon dioxide molecules that are forced into a mixture with water molecules because of the increased pressure. Opening the can of soda will release the pressure, which allows the carbon dioxide, to escape from the mixture and form bubbles. Scientific law A scientific law is a brief statement that summarizes previous observations and can be used to predict the results of future related experiments. The scientific law does NOT explain why the observations occur. Theory Scientific theory explains why observations occur. What is wrong with the statement "it is just a theory"? A scientific theory is the best current explanation of a phenomenon that has been validated by years' worth of experiments. 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How is a scientific theory different than a scientific law quizlet?How does a scientific law differ from a scientific theory? A scientific law describes an observed pattern found in nature without explaining it. The theory is the explanation.
What is the difference between a scientific theory and a scientific law Quizizz?science theories are ideas that explain natural events, while science laws predict what will happen in a natural event.
What is the difference between a hypothesis a theory and a law quizlet?A theory is a hypothesis that is tested by many other scientists and was proved that is scientifically acceptable. A law is a relationship in the nature that supported by many experiments and used as itself to support other hypotheses and experiments.
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How is a scientific theory different from either a hypothesis or scientific law quizlet?
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