Question

A student conducts an experiment to determine how the additional of salt to water affects the density of the water. The student fills 3 beakers with equal amounts of water. He then adds 1 cup of salt to the first beaker, 2 cups of salt to the second beaker and no salt to the third beaker. What is the dependent variable in the student's investigation?

the amount of salt in the water

the temperature of the water

the density of the water

the ph of the water

Answer 1

Candace is curious about which brand of spot remover will best remove ketchup stains from her carpet. What is the independent variable?








The brand of carpet








The brand of spot remover








How thoroughly the stains are removed

Answer 2

i thank it is the brand of spot remover

Answer 3

Jose writes the following hypothesis: If a rose bush receives nitrogen rich fertilizer then it will produce more roses than a rose bush that does not receive nitrogen rich fertilizer. Which of the following is a true statement about Jose's hypothesis?








Jose's hypothesis is neither testable nor falsifiable.








Jose's hypothesis is both testable and falsifiable.








Jose's hypothesis is testable but not falsifiable.








Jose's hypothesis is not testable but is falsifiable.




.

Answer 4

Which step follows the identification of the problem in the technological design process?
a.Decide on a design
b.Research
c.Generate ideas