Vocabulary
factor that the scientist manipulates in an experiment
independent variable
this group in an experiment does not get the independent variable
control group
what happens after the experiment
analyze the data
number of independent variables in a good science experiment
one
Your height, your shoe size, and the length of your fingernails are examples of _?_ observations.
quantitative
factor that responds to manipulated variable
dependent variable
these do not change in an experiment
controlled or constant variables
step before creating a hypothesis
research
variable that is recorded as data
dependent variable
If I use oak in my wood-stove, then it will burn longer than other woods like ash or spruce. What is the dependent variable?
the time the wood burns.
Observations that use your senses (colors, shapes, and textures of objects) are examples of _?_ observations.
qualitative observation
observations and measurements recorded during an experiment
data
what scientists do with their findings
communicate results
An investigation was done to see if keeping the lights on for different amounts of time each day affected the number of eggs chickens laid. What is the independent variable?
keeping the lights on for different amounts of time each day
The amount of algae growth in lakes seems to be directly related to the number of bags of phosphate fertilizer sold by the local merchants. What is the dependent variable?
amount of algae growth in lakes
using one or more of your senses to gather information directly or indirectly through the use of technology or instruments
observation
making a forecast of what will happen in the future based on past experience or evidence
prediction
this is the step before we share or communicate our results in the scientific method
conclusion
A scientist who wants to study the effects of fertilizer on plants sets up an experiment. Plant A gets no fertilizer, plant B gets 5 mg of fertilizer each day, and plant C gets 10 mg of fertilizer each day. Which plant is the control group.
plant A
What two words should be in any good hypothesis?
the words if and then
double points: A good hypothesis must be what?
using new information and what you already know to reason as to what is happening
inference
an explanation or answer to a question that can be tested
hypothesis
first step to the scientific method
ask a question
The amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead. What is the independent variable?
gasoline containing different amounts of lead
I think basketballs inflated with more air bounce higher. Rewrite this statement as a testable hypothesis.
If inflated with more air, then a basketball will bounce higher.