NOS Review Question Preview (ID: 63077)
Nature Of Science 8th Grade Florida Test Review Questions.
TEACHERS: click here for quick copy question ID numbers.
What is the difference between a experimental group and a control group?
a) the experimental group gets the treatment or independent variable, the control group does not.
b) the control group gets the independent variable or treatment, the experimental group does not.
c) they both are treated the exact same way in an experimental setting.
d) none of these are correct.
An experimental group that's purpose is for comparison to the other groups tested. This group does not receive the independent variable.
a) constant
b) dependent variable
c) contrast group
d) control group
How many independent variables does an experiment have?
a) one
b) two
c) three
d) four
What is an independent variable in an experiment?
a) The variable that is affected by changes in other variables
b) The variable that the researcher manipulates*
c) The variable that remains constant throughout the experiment
d) The variable that is not necessary in an experiment
Variable that is measured at the end of an experiment; the results (ex: does patient get better?) The dependent variable is always plotted on the Y axis.
a) Dependent Variable
b) Independent Variable
c) Theory
d) Conclusion
Qualitative observations are observations that
a) uses the five senses
b) uses numbers
c) are more accurate
d) are less accurate
What are Quantitative Observations?
a) a) Describing things like color
b) d) Measuring things like length, amounts, or time
c) c) How something smells
d) b) Describing how something tastes
What does repetition in science experiments refer to?
a) A) Performing a similar experiment in different locations
b) B) Repeating an experiment to test the reliability of the results*
c) C) Using multiple subjects in an experiment
d) D) Conducting the same experiment with different variables
What does scientific replication refer to?
a) A) The duplication of an entire research study by another scientist
b) B) The production of identical twins in a study
c) C) The repetition of a single experiment within a study
d) D) The publication of a research study twice
What is a scientific theory?
a) An explanation that ties together many hypotheses; explains why.
b) An explanation that ties together many hypotheses; explains how.
c) An explanation that ties together many experimental results; explains why.
d) An explanation that ties together many experimental results; explains how.
Scientific models are often used to help scientists understand a problem.
a) True
b) False
c) a
d) b
Models that you can see ande touch are called __________ models
a) computer
b) graph
c) physical
d) idea
The experiments dependent variable is also described as
a) the one thing changed and tested
b) the variable used as a comparison
c) the data that is measured during or after the experiment
d) the variable that must remain the same throughout the experiment
Which section of an experiment sheet tells what the experimenter expected to happen during the experiment?
a) Hypothesis
b) Results
c) Procedures
d) Conclusion
If an experiment is a controlled experiment, how many variables are intentionally changed?
a) as many as you want
b) 2-3
c) only 1
d) none
In an experiment, a sample of granite, limestone, marble, and sandstone each had a constant supply of water running over them for 96 hours. The rocks were then checked for signs of erosion. What was the purpose of this experiment?
a) To analyze the effects of weathering on various environments of Florida.
b) To see what kind of rock particles are suitable for purifying water.
c) To see how changes in the rate of water flow affect different kinds of rock.
d) To see the effects of pH on different kinds of rocks.
A scientist experiments with lab rats in a controlled experiment about how the amount of exercise affects the body mass of lab rats. What is the independent variable of the experiment?
a) amount of exercise
b) amount of food given to rats
c) type of food given
d) size of rats enclosure
Any condition that can be changed in an experiment is called a variable. Which of these best explains why there should only be one variable changed in an experiment?
a) to get results from the experiment faster
b) to make the experiment easier to perform
c) to allow people to know what caused the observed results
d) to reduce the chance of mistakes when doing the experiment
Jaden is doing an experiment to find out if plants grow taller when given plain water or sugar water.To make sure his experiment is a fair test, Jaden should
a) treat both groups of plants the same except for the amount of sugar in the water.
b) give the sugar water plants twice as much water as the plain water plants.
c) put some plants in a warm, sunny spot and put the others in the shade.
d) use one kind of plant for the sugar water group and a different kind for the plain water group.
Frances was working on an experiment for science class. She dropped 4 steel balls of different weights from the same height. She noticed that the balls all reached the ground at the same time. Frances is probably doing an experiment on the-
a) force of wind
b) quality of materials
c) effect of gravity
d) states of matter
Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 63077 in the upper right hand corner or click here.
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 63077 in the upper right hand corner or click here.
TEACHERS / EDUCATORS
Log In | Sign Up / Register
Log In | Sign Up / Register