Question 1. scientists form hypothesis to answer questions.
accurate
short
mathematical
testable
question 2. scientists experiments to make sure the results are meaningful.
perform
repeat
conclude
communicate
question 3. a good hypothesis
is always true.
is always a guess.
is not simply a guess.
none of the above
question 4. two essential parts of a good experiment are
the control group and a single variable.
the control group and the outcome.
two variables.
two control groups.
question 5. in an experiment, the experimental treatment differs from the control treatment only in the being studied.
experiment
variable
hypothesis
data
question 6. a sample size should be enough to give an accurate estimate for the whole population.
large
small
strong
heavy
question 7. a group of individuals or events that have been selected to represent a population is known as a
team.
species.
family.
sample.
question 8. models used by scientists include
conceptual models.
variable models.
physical models.
both a and c.
question 9.a conceptual model represents a way of thinking about
relationships.
variables.
data.
positions.
question 10. to fully understand a complex environmental issue, we really need to consider
economics.
values.
scientific information.
all of the above