1. Table of Contents
How Science Changes

2. Vocabulary
Scientific Theory: is a well-tested explanation of a scientific theory. Scientific Law: Is a statement that describes what scientist expect to happen every time

3. How Does Scientific Knowledge Change? Pg. 73
Scientific knowledge changes as a result of
new evidence
new interpretations of existing evidence.
For example, in the early twentieth century, Marie Curie observed that the element radium was giving off thermal energy at a steady rate. No scientists could explain why this was happening because they thought of mass and energy as separate quantities.
Albert Einstein had a new interpretation for Curie’s evidence. He thought that mass could be converted to thermal energy and vice versa. Einstein’s new interpretation of existing evidence changed scientific knowledge.

4. Comparison of Scientific Law and Scientific Theory pg.74
A scientific law is a statement that describes what scientists expect to happen every time under a particular set of conditions.
A scientific theory is a well-tested explanation for a wide range of observations or experimental results.
Both scientific theories and scientific laws are developed slowly through repeated observation and experimentation.
A scientific theory connects large sets of related observations by one explanation.
Examples of scientific Law:
the law of gravity states that all objects in the universe attract each other. Unlike a theory, a scientific law describes an observed pattern in nature without attempting to explain it.
Examples of scientific theories:
the atomic theory and the cell theory. The atomic theory states that all substances are made up of tiny particles called atoms.
The cell theory states that cells are the basic units of structure and function in living things.

5. Pearson Online Activity
Interactive Activity
Pearson Online Activity