Drag the tiles to the boxes to form correct pairs.
Raya is a gardening enthusiast who is looking to buy a new house. She wonders whether her house plants will grow well if she buys an apartment on a higher floor. She remembers that her friend Jenn also has a small garden on her balcony, and her plants seem healthy.
Raya conducts an experiment to study the effect of altitude on the growth of plants. She gathers plant samples and places them on five different floors of a 20-story building. Identify the basic components of Raya’s experiment, including the confounding variable.

observation

hypothesis

relationship to be tested

dependent variable

independent variable

confounding variable

eliminating a confounding variable

Raya measures the
growth rate of plants.

Raya waters different plant
samples at different times
of the day.

Raya formulates the possible
explanation that plants grow
faster when exposed to
sunlight at higher altitudes.

Raya uses the same fertilizer
for all her plant samples.

Raya plans to compare plant
growth rate against the
altitude.

Raya notices that plants seem
to grow better on high-rise
balconies.

Raya places each plant sample
on a different floor of the
building.