O Using Scientific Methods
Scientists observed that white mice that were fed seeds appeared to grow more than
mice given leafy green and yellow vegetables. The scientists hypothesized that the
protein in the seed was responsible for the growth. They designed an experiment to test
this hypothesis. They divided 200 mice of the same age, size, health, and sex into two
groups of 100 mice each. The mice were kept under identical conditions for fourteen
days. One group was given a diet low in protein. The other group was given a normal
protein diet. The mass of each mouse was recorded daily for fourteen days.
1. Which group of mice served as a control? Groups
2. What was the variable?
A.
3. What effect of the protein diet was tested?