Penn Foster - Biology Lesson 1, The Nature of Science, the Chemistry of Life, and Ecology, Exercise Answer Key Exam Q&A 100% Solved

Penn Foster - Biology Lesson 1, The

Nature of Science, the Chemistry of Life,

and Ecology, Exercise Answer Key Exam

Q&A 100% Solved


Lesson 1 - Exercise: Science in Society - ✔✔Section 1 - Exercise 1 of 3

1. Science is the systematic exploration of _______ about everything in the

physical universe. - ✔✔knowledge

2. _______ caused the end of the nomadic lifestyle of ancient humans. -

✔✔Agriculture

3. Anthropology and psychology help us organize how humans _______. -

✔✔learn

4. The _______ is a process often used by scientists to help them solve

problems. - ✔✔scientific method

5. Before a scientific paper is published, it has to go through a/an _______

process. - ✔✔peer review

,6. Biology is the study of _______. - ✔✔life

7. For DNA to be passed on to a later generation, an organism must

_______. - ✔✔reproduce

Lesson 1 - Exercise: Scientific Method - ✔✔Section 1 - Exercise 2 of 3

1. _______ observation is made using one or more of the five senses. -

✔✔Qualitative

2. An independent variable is a variable that's _______ changed in an

experiment. - ✔✔intentionally

3. An explanation based on an observation is a/an _______. - ✔✔inference

4. There may be only one _______ variable in an experiment. -

✔✔independent

5. _______ observation is made using tools or measurement. -

✔✔Quantitative

6. What's the difference between an observation and inference? - ✔✔An

observation is made using tools or one of the five senses. An inference is a

logical explanation to make sense of observations.



(DO NOT COPY WORD FOR WORD)

7. Independent variable - ✔✔b. The brand of popcorn

, 8. Controlled variable - ✔✔c. The time the popcorn is cooked

9. Responding variable - ✔✔a. The number of unpopped popcorn kernels

Lesson 1 - Exercise: Heart Rate Lab

Part A: Identifying Variables - ✔✔Section 1 - Exercise 3 of 3

1. If the number of cigarettes smoked increases, then the risk for lung

cancer increases.

Independent variable: _______

Dependent variable: _______ - ✔✔Independent variable: number of

cigarettes smoked



Dependent variable: risk for lung cancer

2. If the number of sharks swimming in a coastal region increases, then the

number of shark attacks on humans will also increase.

Independent variable: _______

Dependent variable: _______ - ✔✔Independent variable: number of sharks

swimming in a coastal region



Dependent variable: number of shark attacks on humans