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Total questions: 24
Worksheet time: 36mins
This part of the experiment serves as a basis of comparison:
control group
Independent variable
dependent variable
data
This variable in an experiment is the one being deliberately changed by the scientist.
dependent variable
independent variable
data
control group
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
type of plant
the amount of sunlight
the type of music
the type of liquid
A student wants to test the effects of type of exercise on heart rate. What is the dependent variable?
time of day exercise occurs
amount of exercise
heart rate
type of exercise
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables?
type of plant, amount of music, and sunlight
plant growth
water, apple juice, milk
The graph below shows atmospheric carbon dioxide levels since the year 1880.Which of the following conclusions can be drawn from this graph
Atmospheric carbon dioxide levels are responsible for global temperature change.
Atmospheric carbon dioxide levels have been rising at about the same rate for the past century.
Atmospheric carbon dioxide levels have remained the same over the past century.
Atmospheric carbon dioxide levels have been rising at an increasingly higher rate as the past century has progressed.
In order to be accepted, a scientific theory must be
based on the results of a single experiment
widely tested and supported by extensive data
in line with all previous historical ideas
controversial and cause debate
An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the
type of soda given to each group
amount of soda given to each group
pulse rate of each group
age of participants in each group
A testable question should include what two things?
A hypothesis and question
A question and a dependent variable
An independent variable but no dependent variable
An independent variable and a dependent variable
___ are the first organisms to colonize an area and begin the process of ecological succession.
foundational organisms
introductory organisms
primary organisms
pioneer species
What is the main difference between primary and secondary ecological succession?
Primary begins WITHOUT soil; Secondary begins WITH soil
Primary is the first state and secondary is the second stage
Primary builds plant community; secondary builds animal community.
Primary begins WITH soil; Secondary begins WITHOUT soil
What is an example of an area that is likely to undergo primary succession?
Glaciers melt and leave exposed rock
Plants die from drought and decompose
Land is bulldozed and soil remains
What is the term that describes a steady and stable community?
peak community
turf community
climax community
disturbed community
What does every food chain start with?
producers
sun
consumer
decomposers
The lion is what type of consumer?
Primary
secondary
tertiary
