Pretest
What is an experiment ?
an organized procedure to study something under controlled conditions.
Which of these best describe a scientific theory?
A. an explanation based on the opinion of a scientist
B. a well-supported and widely accepted explanation or nature
C. a description of a specific relationship under given conditions
D. a statement describing what always happens under certain conditions
B. a well-supported and widely accepted explanation or nature
Which scientific investigation does not include dependent and independent variable?
A. observing and counting bird population
B. Studying the effect of temperature on bacterial reproduction rates
A. observing and counting bird population
A science class is studying seeds. They plan to measure the length, height, and mass of different types of seeds. Which of these items should the class use to record their measurements as the class takes the measurements.
Camera
Drawing
Graph
Data Table
Science
Which term describes a collection of observations on which scientific explanation is based on
A. Fieldwork
B. Scientific Law
C. Scientific Theory
D. Empirical Evidence
D. Empirical Evidence
Which of the following scientist would most likely engage in fieldwork to observe organisms.
A. Chemist
B. Biologist
C. Physicist
D. Mathematician
B. Biologist
How can you improve accuracy on an investigation ?
A. Do more trials
B. Use a different method
C. Omit trials
D. Give the average of all data collected
A. Do more trials
Scientists use computer models to study how black holes form in space. What is the most likely reason a computer model is being used?
Black holes do not actually exist
Black holes are too small to study
Black holes are too dark to study
Black holes are too far from Earth
4. Black holes are too far from Earth
a testable idea or explanation that leads to a scientific investigation
hypothesis
A. balance
B. ruler
C. Graduated Cylinder
D. Thermometer
B. Ruler
True/ False
All Branches of science have scientific theory
True
In a scientific investigation, the factor that is deliberately manipulated
Independent Variable
What is a graph that is used to show how a set of data is divided into parts?
Circle Graph
Information gathered by observation or experimentation that can be used on calculating reasoning
Data
Scientists can use many strategies during investigations, including fieldwork, surveys, models, and experiments. Which of these phrases best describes an experiment?
A. Mathematical analysis of data
B. Observation of animals in their natural world
C. of data from an uncontrolled environment for comparative purposes
D. Procedure with controlled conditions and test and outcome variables.
D. Procedure with controlled conditions and test and outcome variables.
A chemist wants to examine specific chemical reactions and isolate certain products using a controlled experiment. How would the chemist perform this experiment?
A. in a laboratory
B. out in the field
C. by performing a survey
D. by using scientific law
A. in a laboratory
During a scientific investigation, which step will a scientist likely perform first?
Plan the experimental procedure
a pattern, plan, representation or description designed to show the structure or workings of an object, system or concept.
Model
The observation, measurement and other types of data that people gather and test to support and evaluate scientific explanations
Empirical Evidence
A. based on scientific evidence
B. explain natural phenomena
C. based on opinions of scientists
D. not subject to change
A. based on scientific evidence
Which of the following statements best describe how scientific ideas change ?
A. New evidence leads to modification of ideas
B. Scientific ideas rarely change, because they are based on extensive evidence
C. As a scientific idea changes, it eventually becomes a scientific theory and then law
D. Scientists form opinions based on evidence and decide how the idea should change
A. New evidence leads to modification of ideas
In a scientific investigation, the factor that changes as a result of manipulation of one or more dependent variable
Dependent Variable
Graphs are visual representations of _____
A map of Florida is an example of a(n) ____
___ show patterns, or trends, in data
Data ; Model ; Graphs
The explanation for some phenomenon that is based on observation, experimentation and reasoning: that is supported by a large quantity of evidence.
Theory