Vocabulary
factor that the scientist changes in an experiment
independent variable
judgement based on the results of an experiment
conclusion
analyze the results
step 4
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 is measured in the experiment
dependent variable
factor(s) held constant in an experiment
controlled variables
test the hypothesis/experiment
step 3
variable that is measured and recorded as data
dependent variable
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
a series of steps followed to solve problems
scientific method
observations and measurements recorded during an experiment
data
communicate results
step 6
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
observations
making a forecast of what will happen in the future based on past experience or evidence
prediction
draw conclusions
step 5
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 dependent variable?
number of eggs chickens laid
What is an idea or conclusion that's drawn from evidence and reasoning from an observation?
inference
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
ask a question
step 1 after making an observation
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
What is a discussion of the data? The data is described and explained and the hypothesis is accepted or rejected
conclusion
Type of observations that are made with instruments such as rulers, balances, graduated cylinders, beakers, and thermometers. These results are measurable.
quantitative observations
Type of observations that deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. They do not involve measurements or numbers.
qualitative observation
reform a hypothesis
step 2
The amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead. What is the dependent variable?
amount of pollution
Colors, shapes, and textures of objects are examples of _?_ observations.
qualitative