There is an apple tree in a scientist's backyard. Every year a bird builds a nest and raises its young in the tree. Each year the scientist records
how many baby birds are born. The scientist also records the average
temperature and rainfall during the summer.
Year 1
Year 2
Year 3
Number of Average
Average Rainfall
Baby Birds Temperature (°C) per Week (cm)
2
25
5
4
24
7
3
27
4
Is this an experiment or an investigation?
O A. An investigation because there are trials over several years.
O B. An experiment because it establishes only cause and effect.
OC. An investigation because it involves only observations of nature.
O D. An experiment because there are multiple variables each year.