Question

KEY CONCEPT Science is a way of thinking, questioning, and gathering evidence. Scientists do not use one scientific method, but all science is based on the same principles: curiosity, critical and logical evaluation of evidence, and the open and honest exchange of data. In any scientific inquiry, scientists • Make observations: Scientists use their senses and various measurement tools to collect information, or make observations, about the world. • Form hypotheses: Scientists propose answers to scientific questions, or form hypotheses, based on observations they, or other scientists, made. • Test hypotheses: Scientists devise methods of observing and experimenting to test their predictions. • Analyze data: Scientists use statistics to analyze data. This analysis tells a scientist whether a hypothesis is supported or not supported by the data. • Evaluate results: Scientists evaluate both their own results and the results from other scientists. Scientists use experiments to test hypotheses. A scientific experiment uses tightly controlled conditions to test a possible cause-and-effect relationship between variables. In an experiment, there are constants and two types of variables: the independent variable and dependent variables. • Independent variables: An independent variable is a condition that is manipulated by a scientist to determine its effect on a dependent variable. An independent variable is the "cause." • Dependent variables: A dependent variable is measured by a scientist to study the effect of the independent variable. It is the "effect" and depends on the independent variable. • Constants: Factors that are controlled so that they do not change are constants. A hypothesis is a proposed explanation for a single observation. A scientific theory, however, is a proposed explanation for a wide range of observations and experimental results, and is supported by a wide range of evidence. 1. How do scientists use hypotheses? 2. What is the difference between independent variables and dependent variables? 3. What is a theory?

KEY CONCEPT Science is a way of thinking, questioning, and gathering evidence. Scientists do not use one scientific method, but all science is based on the same principles: curiosity, critical and logical evaluation of evidence, and the open and honest exchange of data. In any scientific inquiry, scientists
• Make observations: Scientists use their senses and various measurement tools to collect information, or make observations, about the world.
• Form hypotheses: Scientists propose answers to scientific questions, or form hypotheses, based on observations they, or other scientists, made.
• Test hypotheses: Scientists devise methods of observing and experimenting to test their predictions.
• Analyze data: Scientists use statistics to analyze data. This analysis tells a scientist whether a hypothesis is supported or not supported by the data.
• Evaluate results: Scientists evaluate both their own results and the results from other scientists.
Scientists use experiments to test hypotheses. A scientific experiment uses tightly controlled conditions to test a possible cause-and-effect relationship between variables. In an experiment, there are constants and two types of variables: the independent variable and dependent variables.
• Independent variables: An independent variable is a condition that is manipulated by a scientist to determine its effect on a dependent variable. An independent variable is the "cause."
• Dependent variables: A dependent variable is measured by a scientist to study the effect of the independent variable. It is the "effect" and depends on the independent variable.
• Constants: Factors that are controlled so that they do not change are constants.
A hypothesis is a proposed explanation for a single observation. A scientific theory, however, is a proposed explanation for a wide range of observations and experimental results, and is supported by a wide range of evidence.
1. How do scientists use hypotheses?
2. What is the difference between independent variables and dependent variables?
3. What is a theory?

Added by Steven W.

Question

Please give Ace some feedback