Science第 75 / 120 题
In a controlled experiment, the variable that is deliberately changed by the researcher is called the:
a.Dependent variable
b.Independent variable
c.Control group
d.Constant
解析
The independent variable is the factor the researcher intentionally manipulates to observe its effect. The dependent variable is what is measured in response.
免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- Which subatomic particle carries a negative electrical charge?
- Which system includes the bones and provides support and protection for the body?
- What is the main function of red blood cells?
- Which gas do humans primarily exhale as a waste product of cellular respiration?
- Which of the following best describes the role of enzymes in the body?
- The kidneys are the primary organs of which body system?