Unit 1 Review Flashcards
What is science?
A method for studying the natural world
Thompson and Rutherford both created models of what?
atoms
The present-day model of an atom is a result of what?
many investigations and collaborations of many scientists
How do scientists learn new information about the natural world?
by performing investigations
Provide the definition of the term:
scientific method
an organized set of investigation procedures
Fill in the chart pertaining to the scientific method:
Answer the question with the best available option:
What is a hypothesis?
A. A possible explanation for a problem using what you know and what you observe
B. A test monitoring the effect of one thing on another using controlled conditions
C. A quantity that can have more than a single value
D. None of the above
A. A possible explanation for a problem using what you know and what you observe
Fill in the blanks:
Some ____________ can be tested by making ______________. Others can be tested by building a _______ and relating it to ___________ situations.
hypotheses, observations, model, real-life
True or false? If false, correct the statement:
An experiment tests the effect of one thing on another using uncontrolled conditions.
False. An experiment tests the effect of one thing on another using controlled conditions.
Provide the definition of the term:
variable
a quantity that can have more than a single value
Provide the definition of the term:
Dependent variable
the changes according to the change of the independent variable
In this experiment, what is the dependent variable?
the amount of growth / height after two weeks
Fill in the blanks:
The variable you ________ to see how it will ________ the dependent variable is called the independent variable.
change, affect
After being provided the definition, name the term:
a factor that does not change when other variables change
constant
What is the independent variable in the experiment below:
A scientist is creating an experiment to see the affect red light has on plant growth.
The color of light (red in this case)
What are some possible constants in the experiment below:
A scientist is creating an experiment to see the effect watering plants has on their growth.
- Type of plant
- Amount of water being given
- Soil type
- Size of the pots
- Temperature
- Sunlight exposure
- Humidity levels
Provide the definition of the term:
control
the standard by which the test results can be compared
Ex.) If an experiment was trying to see if phosphorous made plants grow more, they would have a control plant that would not be given any phosphorous to compare the results to
Fill in the blank:
A bias occurs when what the ___________ expects changes how the _________ are viewed.
scientist, results
What is this an example of?
A scientist selects a result from one trial over those from other trials
bias
How can scientists lessen bias?
By running as many trials as possible and keeping accurate notes of each observation made
Provide the definition of the term:
model
a representation of an idea, event, or object to help people better understand it
True or false? If false, correct the statement:
Models are often used to represent things that are very small or very large.
True
What are the three types of models, and what do they do?
- Physical Models - look like the thing they represent
- Mathematical Models - made up of mathematical equations and data
- Conceptual Models - systems of ideas or are based on making comparisons with familiar things to explain an idea
In a simpler term, a conceptual model helps to visualize and explain how something works without going into all the details.
Using the word bank, categorize the following:
Word bank:
Physical Model
Mathematical Model
Conceptual Model
physical model
