Scientific Method- Mr. Angeles

A variable is a factor or condition that can be altered or manipulated in an experiment. By changing a variable, it can have an impact on the outcome or results of the experiment. This can be done by adjusting the value or condition of the variable being studied. Therefore, changing an experiment is a valid explanation for the correct answer.

Safety goggles are worn in the laboratory to protect the eyes from harmful substances. In a laboratory, there are various chemicals and materials that can be hazardous if they come into contact with the eyes. Safety goggles provide a barrier between the eyes and these substances, preventing any potential injuries or damage to the eyes. Wearing safety goggles is an important safety precaution to ensure the well-being and protection of the eyes in a laboratory setting.

The hypothesis is not the curved surface of a liquid. A hypothesis is a proposed explanation or prediction that can be tested through experimentation or observation. It is a statement that can be either true or false, but it is not related to the curved surface of a liquid.

An experiment is an organized process used to gather observations and test a hypothesis. It involves systematically manipulating variables and measuring their effects in order to draw conclusions and validate or refute a hypothesis. Through experimentation, scientists can investigate cause-and-effect relationships and gain a deeper understanding of the natural world.

In an experiment, it is recommended to test only one variable at a time. This is because testing multiple variables simultaneously can make it difficult to determine which variable is causing a specific outcome or effect. By testing one variable at a time, researchers can isolate and analyze the impact of that specific variable on the experiment's results.

A hypothesis is an educated statement that can be tested. It is a proposed explanation or prediction based on observations and prior knowledge. In the scientific method, a hypothesis is formulated to explain a phenomenon or make a prediction, and then it is tested through experiments or further observations. A hypothesis is an essential component of scientific research as it allows scientists to systematically gather evidence and draw conclusions based on empirical data.

Gram is indeed the unit used to measure the mass of an object. The gram is a metric unit of mass, and it is commonly used in scientific and everyday measurements. Other units of mass, such as kilograms and pounds, are also used, but the gram is one of the most commonly used units for smaller objects.

The given table shows the scores of 4 students before and after playing the video game. Out of the 4 students, only one student showed improvement in their scores after playing the game. The scores of the other three students either stayed the same or decreased. Therefore, the results do not show that the video game helps students improve test scores as the majority of the students did not experience any improvement.

Step-by-step approaches to solving problems are called scientific methods. The scientific method is a systematic process used by scientists to investigate phenomena, acquire new knowledge, or correct and integrate previous knowledge. It involves making observations, formulating hypotheses, conducting experiments, analyzing data, and drawing conclusions. The scientific method provides a structured and reliable way to solve problems and gain a deeper understanding of the natural world.

Observation refers to the act of using our senses to gather information or data about the world around us. It involves carefully watching, listening, smelling, touching, or tasting something in order to gain knowledge or understanding. By making observations, we can gather evidence, identify patterns, and make inferences or conclusions about the phenomena we are studying. In the context of the question, using our senses to gather bits of information is specifically referred to as observation.

The given statement is not an example of a conclusion. It is actually a question about the effect of temperature on plant height. A conclusion is a statement that is reached after analyzing data or evidence. In this case, the statement is a question, not a conclusion.

The dependent variable is a factor that is measured in scientific research to understand the impact of one or more independent variables. This means that the dependent variable is influenced by the independent variable(s) being studied. By measuring the dependent variable, researchers can determine the effect or relationship between the independent variable(s) and the outcome being measured. Therefore, the statement is true.

Science is the process of understanding the world through systematic observation, experimentation, and the formulation of theories or laws based on the collected data. It involves using evidence and logical reasoning to explain natural phenomena and make predictions about future events. Science helps us gain knowledge about the world and improve our understanding of the universe and everything in it.

A model is a representation or framework that can be used to explain or understand something. It can be a physical object, a diagram, or a conceptual framework. Models are used to simplify complex concepts or systems and make them easier to study or analyze. They provide a way to visualize and communicate ideas, and can be used to make predictions or test hypotheses. Therefore, a model is the most appropriate choice to represent something that is being explained.

Olivia's hypothesis is that if she tests both waters, then the water from her house will be healthier than school water. This hypothesis suggests that Olivia believes there may be a difference in the healthiness of the water from her house and the water from school. She wants to conduct an experiment to gather evidence and determine if her belief is true.

The statement is true because in an experiment, the manipulated variable is intentionally altered or changed by the researcher in order to observe the effect it has on the dependent variable. This is done to test a hypothesis or to determine the cause-and-effect relationship between variables. By manipulating the variable, the researcher can control and manipulate the conditions of the experiment to gather data and draw conclusions.

A scientific law is a rule or principle that describes the behavior of something in nature. It is based on repeated observations and experiments and is widely accepted as true. Unlike a hypothesis or theory, a scientific law is a statement of fact that does not require further testing or validation. It provides a concise and general explanation of a natural phenomenon or behavior.

The experimenter has control over the independent variable in an experiment. This variable is intentionally manipulated or changed by the experimenter to observe its effect on the dependent variable. The dependent variable, on the other hand, is the variable that is being measured or observed and is expected to change in response to the independent variable. Therefore, the independent variable is the variable that could be changed by the experimenter.

The dependent variable is the variable that is being measured or observed during an experiment. It is the outcome or result that is influenced by the independent variable, which is the variable that is manipulated or changed by the researcher. The dependent variable is dependent on the independent variable, as any changes in the independent variable can affect the dependent variable. Therefore, the dependent variable is the variable that could be measured during an experiment.

In this experiment, the scientist is comparing the growth of corn in two different conditions: row 1 with fertilizer and row 2 without fertilizer. The controlled variable is the amount of fertilizer given to the experimental group. By keeping the amount of fertilizer constant, the scientist can determine if the growth of corn is influenced by the presence or absence of fertilizer, while other factors like water and light intensity remain the same for both rows.

The independent variable in this experiment is the thickness of the candle. Suzy is testing if thicker candles burn longer than thinner candles, so she is manipulating the thickness of the candles to see how it affects the burn time. The other variables, such as the length of time the candle burned and the color of the candle, are not being manipulated by Suzy and are therefore not independent variables in this experiment.

In this experiment, the height of each plant is being measured after being watered with different concentrations of salt water. The height of the plants is the dependent variable because it is the outcome or result that is being measured and observed. The independent variable in this experiment is the different concentrations of salt water being used to water the plants. Qualitative data refers to non-numerical observations, so it is not the correct answer in this case.

In an experiment, a constant is a factor that remains unchanged throughout the entire process. It is not affected by any of the variables being tested. Constants are important because they provide a baseline for comparison and help ensure that any changes observed are due to the manipulated variables and not other factors. By keeping certain factors constant, scientists can isolate the effects of the variables they are interested in studying. Therefore, constant(s) is the factor that remains the same phases of an experiment.

The first step to the scientific method is to recognize the problem. This involves identifying and defining the specific issue or question that needs to be investigated. Without recognizing the problem, it is impossible to proceed with the scientific method as it provides the foundation for formulating hypotheses, designing experiments, and analyzing data.

John is currently working in Step 2. In the research process, Step 1 involves identifying the problem, while Step 2 involves gathering information and data to come up with an educated guess or hypothesis. Therefore, John is in the stage of collecting information and data to formulate a hypothesis that can potentially explain his problem.

John is in Step 3 of the scientific method, which is collecting and analyzing data. In this step, he is writing data in his data table, which involves gathering information and organizing it for further analysis. This step is crucial for drawing conclusions and making interpretations based on the collected data.

The correct answer is that she did not test a large enough sample of people. In order to draw accurate conclusions, it is important to have a sufficient sample size that is representative of the population being studied. By only measuring three people, Janet's sample size is too small to make generalizations about the relationship between height and handspan. A larger sample size would provide more reliable data and allow for better analysis of any potential patterns or trends.

The statement "The chemicals look gross when you mix them together" is not an observation because it involves a subjective judgment or opinion rather than a factual observation. Observations should be based on objective and measurable data, such as the fizzing of the rock when acid is poured on it or the height of the explosion.

The final step of the scientific method is to communicate the results and findings of the experiment. This is important because it allows other scientists to review and replicate the experiment, ensuring the validity and reliability of the results. Communication also helps in sharing knowledge and advancements in the scientific community, leading to further research and development.