Physical Science - Ch. 1 - The Nature Of Science

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

An experiment is an organized process used to gather observations and test a hypothesis. It involves carefully designed procedures and controlled variables to systematically investigate a specific question or phenomenon. Through an experiment, scientists can collect data, analyze results, and draw conclusions that contribute to the understanding of a particular subject. This methodical approach allows for the replication and verification of findings, making it an essential tool in scientific research.

A physical scientist who studies heat and light is working with energy. Heat and light are forms of energy, and studying their properties and behavior falls under the domain of physical science.

The lightbulb is an example of technology because it is a man-made invention that utilizes scientific principles to produce light. Technology refers to the application of scientific knowledge for practical purposes, and the lightbulb is a perfect example of this as it harnesses electricity to create artificial light.

A model is a representation of something that helps to explain or understand it. It can be a physical object, a diagram, or a mathematical equation. Models are used in various fields such as science, economics, and engineering to simplify complex concepts and make them easier to study and analyze. They provide a framework for understanding and predicting the behavior of the real-world system or phenomenon they represent.

Physical science is the study of matter and energy. This field of science focuses on understanding the fundamental properties, behavior, and interactions of matter and energy in the physical world. It encompasses various sub-disciplines such as physics and chemistry, which explore the nature of matter and the energy transformations that occur. By studying matter and energy, physical scientists seek to uncover the underlying principles and laws that govern the universe and its phenomena.

When designing an experiment, the first step is to state the problem. This involves identifying and clearly defining the question or issue that the experiment aims to address. By stating the problem, researchers can establish a clear focus for their experiment and determine the specific objectives they want to achieve. This step is crucial as it helps guide the entire experimental process, from formulating a hypothesis to collecting and analyzing data, ultimately leading to drawing conclusions and determining the significance of the findings.

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 it is widely accepted as true and reliable. Unlike a hypothesis or theory, a scientific law is a statement of fact that describes a phenomenon or relationship in nature. It is often expressed mathematically and can be used to predict and explain natural phenomena.

In an experiment, a constant is a factor that remains unchanged throughout the entire process. It is used as a baseline or reference point to compare the effects of other variables. By keeping certain factors constant, researchers can isolate the impact of the independent variable on the dependent variable. This allows for a more accurate analysis and interpretation of the results. Therefore, the correct answer is constant.

The application of science knowledge to practical problems is referred to as technology. Technology involves the use of scientific principles and techniques to create new products, tools, and systems that solve real-world problems and improve the quality of life. It encompasses various fields such as information technology, engineering, medicine, and agriculture, among others. Through technology, scientific knowledge is translated into tangible and useful applications that benefit society.