Question 1

which of the following describes the treatment in an investigation?
answer

a controlled test designed to answer a question or solve a problem

the factor that responds to a change

the factor that is kept constant

the factor that is changed in order to observe a response

question 2

which statement best describes an independent variable?
answer

the variable that responds to change in an investigation

the variable you change in an investigation

the effect in a cause effect relationship

the factor that can never change in an investigation

question 3

liam did an investigation to see how water temperature affects the amount of salt that will dissolve in the water. he filled 4 beakers with exactly 100 milliliters of water each. he then heated each beaker to a different temperature and tested salt solubility at each different temperature. what was liam's independent variable?
answer

amount of water in each beaker

the number of beakers

the amount of salt that dissolved in each beaker

the temperature of the water in each beaker

question 4

which of the following is an example of a treatment?
answer

plants response to changes in temperature

changes made to the temperature of a greenhouse

the kind of soil the plants are in

question 5

jose is curious about which home remedy removes skunk smell from his dog. which of the following is a variable that must be kept constant?
answer

how well the skunk smell is removed.

the home remedy used

the breed of dog

question 6

it is not important to make sure that all variables other than the independent variable are kept constant.
answer true false

question 7

in order to determine whether or not a substance is an acid or a base, you may stick your finger in the container and make your decision based on whether or not your finger feels slippery.
answer true false

question 8

a poison hazard symbol means your should not let chemicals contact your skin, ingest or inhale the substance.
answer true false

question 9

repeating an experiment is important because
answer

you form a hypothesis

it proves the hypothesis is correct

it reduces the chance of error

question 10

when using repeated trials during a scientific investigation, scientists should find the average of their data for use in their final report.
answer

true

false