Answer
a. observation ( O )
b. hypothesis ( H )
c. experiment ( E )
d. experiment ( E )
e. observation ( O )
f. conclusion ( C )
Work Step by Step
a. Lucia notices that the dye in a design fades when the shirt is
washed.
It is an observation.
Lucia decides that the dye needs something to help it combine with the fabric
It is a hypothesis
c. She places a spot of dye on each of four shirts and then places each one separately in water, salt water, vinegar, and baking soda and water
It is an experiment
d. After one hour, all the shirts are removed and washed with a
detergent
It is an experiment.
e. Lucia notices that the dye has faded on the shirts in water, salt water, and baking soda, while the dye did not fade on the shirt soaked in vinegar
It is an observation.
f. Lucia thinks that the vinegar binds with the dye so it does not fade when the shirt is washed.
It is a conclusion.
