Introduction to Science and Chemistry

<p>To maintain a stable pH level. (C)</p> Signup and view all the answers

<p>High density in the liquid state (C)</p> Signup and view all the answers

<p>It must be based on previous research. (D)</p> Signup and view all the answers

<p>The amount of fertilizer applied. (D)</p> Signup and view all the answers

<p>To provide a baseline for comparison with the experimental group. (C)</p> Signup and view all the answers

<p>Developing a new drug to treat cancer. (B)</p> Signup and view all the answers

<p>A theory is a broad explanation supported by evidence, while a hypothesis is a specific testable explanation. (D)</p> Signup and view all the answers

<p>Because it allows us to gather evidence to either support or reject the hypothesis. (B)</p> Signup and view all the answers

<p>To reduce the influence of personal biases on the results. (D)</p> Signup and view all the answers

<p>Accepting scientific findings without question. (D)</p> Signup and view all the answers

<p>Neither the participants nor the researchers know who is receiving the drug. (B)</p> Signup and view all the answers

<p>There may be a third factor influencing both exercise and health. (B), No conclusion can be drawn, as correlation does not imply causation. (C)</p> Signup and view all the answers

<p>Universal solvent, allowing water to dissolve many substances. (D)</p> Signup and view all the answers

<p>Ionic bond (C)</p> Signup and view all the answers

<p>Iron (Fe) (B)</p> Signup and view all the answers

<p>Carbon-12 has more neutrons than carbon-14. (D)</p> Signup and view all the answers

<p>Has a sour taste. (B)</p> Signup and view all the answers

<p>Nonpolar covalent bond (B)</p> Signup and view all the answers

Science is an ever-changing body of knowledge and a systematic process to answer natural world questions.

Basic science is driven by curiosity to advance knowledge, focusing on understanding the natural world.

Applied science uses basic science to solve specific problems or create practical applications.

A hypothesis is a testable and falsifiable proposed explanation for one or more observations.

Steps include Observation, Question, Hypothesis, Experiment, Results, Conclusion.

An independent variable is what you change in an experiment to test its effect.

The control group does not receive the treatment in an experiment, allowing for comparison.

Bias is any deviation from true findings due to preconceived notions, which can affect results.

Measures the concentration of H⁺ ions in a solution, ranging from 0 to 14.

pH level of 7, indicating a neutral solution like pure water.

Substances that help maintain stable pH levels in biological systems.

The minimum energy required to initiate a chemical reaction.

A chemical reaction that involves breaking down molecules by adding water.

An experiment where participants do not know who receives the treatment.

An experiment where both participants and researchers do not know who receives the treatment.

A relationship between two variables that occurs without chance.

A direct cause-and-effect relationship between two variables.

The basic unit of matter, made of protons, neutrons, and electrons.

A strong bond formed when atoms share electrons.

Water has a positive and negative side due to uneven electron sharing.

Acids release H⁺ ions, while bases release OH⁻ ions in water.