The scientific method
What is the first step of the scientific method?
Observation
What variable is manipulated by the person carrying out the experiment?
Independent variable
When a substance transitions from a solid to a liquid
What molecule serves as a blueprint for all organisms?
DNA
What is a substance made of two or more substances?
Mixture
What is the final step of the scientific method?
Communicate results
This variable is the data you collect during an experiment
Dependent variable
When a substance transitions from a gas to a liquid
Condensation
How is a scientific law usually written?
As a mathematical equation
What is a heterogeneous mixture called?
Suspension
The testing of a hypothesis
Experiments
All the things in an experiment that must be kept the same to make it fair
Controlled variable
When a substance transitions from a liquid to a gas
Evaporation
A change of state is always a _________ change
Physical change
What is a homogeneous mixture called?
Solution
What is a reasonable, educated guess known as?
Hypothesis
A scientist hypothesizes that the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female.
What is the independent variable?
The incubation temperature
When a substance transitions from a gas to a solid
Deposition
What molecule serves as a blueprint for all organisms?
DNA
This substance dissolves another substance in a solution
Solute
What are you doing when you decide whether or not the data supports the original hypothesis?
Drawing conclusions
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 10mg of fertilizer each day. Which plant is the control group?
Plant A
When a substance transitions from a solid to a gas
Sublimation
A body of scientific evidence describing why something happens
Theory
In a solution, this is the dissolved substance
Solute