Science Test 9/14 Flashcards
What is a ruler used for?
To measure the length of a fossil
What are models?
A visual representation of an object or system. A model is generally used to show items that are too big or small to study.
What would a scientist do first for an observation?
Define a problem
When do you use your senses?
During an observation
What is an observation?
The process of obtaining information using the senses
What is a dependent variable?
The outcome variable, the factor that changes in an expierament
What is the difference between and independent and dependent variable?
The dependent variable changes based on the independent variable.
What does a scientist do after they collect there data?
They draw a conclusion
A chemist want to learn about different chemicals to test with. Lab work or fieldwork?
Lab work
A scientist wants to observe how a duck lives. Lab work or field work?
Field work
When do scientific ideas change?
When they find new evidence
What is a theory?
It is a well supported explanation of nature. Also, it explains why something happens.
What is a law?
It is a description of a specific relationship u de given conditions in the world. A scientific law describes what happens
What is empirical evidence?
It is all the measurements and data scientists gather in supposed PGA scientific explanation.
What is a hypothesis?
A testable idea or explanation you make before you experiment.
