WorksheetsChapter 2
Total questions: 20
Worksheet time: 10mins
A good scientist will...
believe everything they are told and listen to themselves only
be skeptical and not listen to what other people are saying
be curious and open minded
be nervous and possibly change results
A model of a globe of the world is an example of a ______ model.
physical
conceptual
mathematical
graphical
An experiment is carried out to determine the effect of sunlight on the growth of sun flowers. What is the independent variable?
kind of flower
type of soil
growth of flowers
amount of sunlight
The group that does not receive the experimental treatment in an experiment is the
experimental group
control group
data
variable
What essential characteristic does a good experiment have?
a single variable is used
a control group is given the experimental treatment
multiple independent variables are used
A hypothesis that doesn't make sense
Why are mathematical models important?
They are especially useful in situations with many variables
They can be used to create useful digital images
They can represent how a system or process works
all of the above
A good hypothesis should ______ and follow from what you already know about the situation.
be long and wordy
make an example
make logical sense
be interesting
Janet and John want to test different shaped bird feathers to see how far they will drift away in the wind. What is the dependent variable?
the shape
the paper
the wind
How far
A scientific theory is _____.
a statement of fact
an explanation that has been tested over time
occasionally proven
a supposition
What is a verbal or graphical explanation for how a system works or is organized
data
prediction
experiment
conceptual model
Janet and John want to test different shaped bird feathers to see how far they will drift away in the wind. What is the independent variable?
the shape
the paper
the wind
How far
Based on your observations, you suggest that the presence of water could accelerate the growth of bread mold. This is a(n)
experiment
conclusion
hypothesis
an analysis
The work of scientists usually begins with
testing a hypthesis
creating experiments
drawing conclusions
careful observations
Marco is investigating to find out if bean plants grow taller in ordinary top soil or special potting soil over a three week period. He sets up his investigation with 5 bean plants of equal size in each type of soil. What should Marco do each day to make sure he gets valid results?
Calculate the average plant height for only the plants in special potting soil.
Move the plants in ordinary topsoil to different locations
Estimate the height of each plant's stem and record the estimate.
Water all the plants equally and record the amount each day.
Which of the following questions could be answered by a scientific investigation?
What color is the best to paint with?
What is the best flavor of soft drink?
What animal make a good pet?
What caused some metals to rust?
Which of the following should be a goal of a scientific investigation?
to help the scientist make money
to make sure the scientist is correct
to help scientist solve a problem
to make sure other scientists are incorrect
Which of the following is the main purpose of a scientific investigation?
to support results from previous investigations
to answer questions about the natural world
to determine the investigator's opinion
to prove a scientific law
Scientific investigations include many different steps. During a scientific investigation, which step occurs after a scientist collects data?
draw a conclusion
plan the experiment
form a hypothesis
follow a procedure
How many independent variables does an experiment have?
1
2
3
4
Dr. Brandel thinks she has just discovered a new plant species. How should she best communicate her findings with other scientists?
Try to find another plant to discover
Post her discovery on the internet as fact
Call her friends and tell them about her discovery
Publish her discovery for other scientists to test
