Science Vocabulary
An educated guess that can be tested in an experiment.
Hypothesis
The variable that the scientist changes on purpose.
Independent variable
This is the first step of the scientific menthod.
Ask a question / identify a problem
A statement that describes a natural event and is always true under the same conditions.
Scientific Law
A chart or graph is used to help scientists do what?
Organize and interpret data
Information gathered through your senses or with tools.
Observation
The variable that is measured or observed.
Dependent variable
Why do scientists repeat experiments?
To check accuracy and reliability.
This explains why things happen in nature, but can change with new evidence.
Scientific Theory
A student records the number of times a cricket chirps per minute. Is this qualitative or quantitative data?
Quantitative
A conclusion based on evidence and reasoning.
Inference
The variables that must stay the same to keep the test fair.
Controlled variable
What should scientists do after collecting data?
Analyze the data
This is used to represent something too big, smal, or complex to study directly.
Model
What type of data uses descriptions like color, texture, or smell: quantitative or qualitative?
Qualitative
The step-by-step process scientists use to answer questions.
Scientific Method
A student tests how sunlight affects plant growth. What is the dependent variable?
If your data does not support your hypothesis, what should you do?
Revise the hypothesis and test again.
Which is an example of a scientific law: gravity or cell theory?
Gravity
If a graph shows a line going upward, what does that usually mean?
There is an increase in the dependent variable.
A possible explanation for a natural event that is supported by repeated experiemnts.
Scientific Theory
A teacher wanted to see if different liquids affect how fast sugar dissolves. What is the independent variable?
The type of liquid.
Why do scientists share their results?
So others can repeat, verify, and build on their work?
Which is an example of scientific theory: plate tectonics or Newton's Laws of Motion?
Plate Tectonics
A student claims that plants with music grow taller. What evidence would make this a strong conclusion?
Data from repeated experiments showing consistent results.