1.)One of the steps if scientific method if "formulating hypothesis".What is actually done in this steps.
a.) stating a problem
b.) making an educated guess
c.) gatherinf anf recording data
d.) interpreting and analyzing data
2.)A logical pricedure for working out a solution to a problem.
a.) problem
b.) hypothesis
c.) variables
d.) scientifiv methods
3.)How is hypothesis related to an experiment?An experiment is -
a.) written to support an experimental design.
b.) designed to dispove the hypothesis.
c.) designed to prove the hypothesis.
d.) design to the test the hypothesis
4.)Mario is studying the effect of temperature on the growth of molds.He write in his notebook, "May molds need a higher temperature to growth" This statement is a -
a.) research problem
b.) conclusion
c.) hypothesis
d.) analysis
5.What is the purpose of the control setup in the experiment.
a.) To manipulate the experimental variables.
b.) To minimize the effect of constant variables.
c.) To control the varuation in the independent variable
d.) To ensure the changes/effects are due to the independent variables
6.Which of the following mis conclusion for more valid.
a.) well organized data
b.) expensive materials
c.) sophisticated gadgets
d.) more trials
7.If you want to prove whether the amount of water affects the dissolving time of sugar what should you do?
a.) put both one teaspoon (tsp) sugar in 100mL and 200mL tap water.
b.) put a both 1 tsp sugar in 100 mL hot water and 200mL tap water
c.) put one teaspoon sugar in hot water and other tsp sugar in tap water.
d.) put 1 tsp sugar in 100 ml of tap water and another tsp sugar in 100 ml of hot water
8.)Lorna would like to experiment on which design of paper plane A or B flies better.Which of the following should be the best measure of a paper plane judged in flying better?
a.) the distance of flying from the original point to its landing point
b.) the time of flying from the original point to its landing point
c.) the size of the airplane
d.) hard to tell
9.)A student wanted to compare the energy value of some food.He burn different food sample of the test tubes containing fix amount of water.He used the increase in water temperatures as a measure of his relative energy values.Which of the following variables must be kept the same ensure validity of result?
a.) mass of food sample
b.) volume of food sample
c.) initial temperature of water
d.) final temperature of water
10.Some student wanted to test the best brand of dye in dyeing fabric.They dipped one piece of identical fabric in each brand of dye.Then they washed and dried fabric of the same time.The pieces of fabric were then compared.Which of the following should be keep constant of this is to be fair experiment
a.) brand of dye,kind of fabric,amount of dye
b.) kind of fabric,amount of dye,time of dyeing
c.) time of dyeing,washing and drying,brand if dye
d.) size of fabric,brand of dye,timd of wasing and drying
