TEAS 7 Science
Exam Prep
3 Full Sets Exams
159 Bonus Questions
NGN-Style Q&A with Rationales
What You’ll Get:
• Set 1, 2, 3 → 50 Questions each
• 3 Full TEAS Science Practice Tests (150 Qs) + 159 Bonus Questions with
Rationales
• Expert-verified explanations for stronger understanding
• Clear, organized review material
• Printable and digital-friendly PDF format
• This PDF is designed to support high-yield review, reinforce key psychology
concepts, and help you feel more prepared for final exam success.
This is an independent study resource and is not affiliated with
or endorsed by ATI Testing or the TEAS exam
, TABLE OF CONTENTS
TEAS 7 Science Exam Set 1……………………………………………. 2
TEAS 7 Science Exam Set 2………………………………………….…. 18
TEAS 7 Science Exam Set 3………………………………………….…. 31
TEAS 7 Science Bonus Qns………………………………………….…. 45
1. What describes the increase in alleles that permits a species to survive and reproduce
better in an environment from generation to generation?
a) DNA
b) Genetic drift
c) Mutation
d) adaptation
Correct Answer: d) Adaptation
Rationale: Adaptation refers to heritable traits that increase an organism’s fitness in a given
environment. Over generations, natural selection favors advantageous alleles, increasing their
frequency in the population. Mutation introduces variation, but adaptation is the outcome of
selection acting on that variation.
2. What nervous system directs the body’s fight or flight response?
a) peripheral
b) central
c) parasympathetic
d) sympathetic
Correct Answer: d) Sympathetic
Rationale: The sympathetic division of the autonomic nervous system prepares the body for
stress by increasing heart rate, dilating bronchi, and mobilizing energy stores. The
parasympathetic system, in contrast, promotes “rest and digest” functions.
3. What is used in quantitative investigations?
a) sensory information
,b) numerical information
c) phenomenological research
d) ethnographic research
Correct Answer: b) Numerical information
Rationale: Quantitative research relies on measurable, numerical data that can be statistically
analyzed. This contrasts with qualitative methods (e.g., ethnographic or phenomenological),
which focus on descriptive or experiential data.
4. Which of the following taxonomic ranks is the most general? (Order, genus, phylum,
family)
a) order
b) genus
c) phylum
d) family
Correct Answer: c) Phylum
Rationale: Taxonomic hierarchy proceeds from broad to specific: domain → kingdom →
phylum → class → order → family → genus → species. Phylum is more inclusive than order,
family, or genus.
5. Water undergoes relatively minor temperature and phase changes compared to other
substances due to both its what?
a) low specific heat and low vaporization
b) low specific heat and high heat vaporization
c) high specific heat and low heat of vaporization
d) high specific heat and high heat of vaporization
Correct Answer: d) High specific heat and high heat of vaporization
Rationale: Hydrogen bonding in water requires significant energy to break, giving water a high
specific heat (resists temperature change) and high heat of vaporization (requires much energy to
evaporate), stabilizing biological systems.
6. What is an example of hydrocarbons containing double bonds?
a) C₂H₆
b) C₄H₈
c) C₆H₁₀
d) C₈H₁₂
, Correct Answer: b) C₄H₈
Rationale: Hydrocarbons with double bonds are alkenes (general formula CₙH₂ₙ). C₄H₈ fits this
pattern, indicating at least one double bond. C₂H₆ is an alkane (single bonds only).
7. What represents the correct order of scientific process?
a) hypothesis, data, analysis
b) hypothesis, analysis, data
c) data, hypothesis, analysis
d) data, analysis, hypothesis
Correct Answer: a) Hypothesis, data, analysis
Rationale: The scientific method typically begins with a hypothesis, followed by
experimentation (data collection), and then analysis to draw conclusions.
8. What organ system supplies the body cells with oxygen and nutrients?
a) cardiovascular
b) digestive
c) nervous
d) immune
Correct Answer: a) Cardiovascular
Rationale: The cardiovascular system transports oxygen, nutrients, hormones, and waste
products via blood circulation, ensuring cellular homeostasis.
9. Through what does blood pass after leaving the right ventricle during contraction of the
heart?
a) aorta
b) pulmonary artery
c) vena cava
d) mitral valve
Correct Answer: b) Pulmonary artery
Rationale: The right ventricle pumps deoxygenated blood into the pulmonary artery, which
carries it to the lungs for gas exchange.
10. What organ system supplies the body with oxygen and removes carbon dioxide?
a) integumentary
b) endocrine
Exam Prep
3 Full Sets Exams
159 Bonus Questions
NGN-Style Q&A with Rationales
What You’ll Get:
• Set 1, 2, 3 → 50 Questions each
• 3 Full TEAS Science Practice Tests (150 Qs) + 159 Bonus Questions with
Rationales
• Expert-verified explanations for stronger understanding
• Clear, organized review material
• Printable and digital-friendly PDF format
• This PDF is designed to support high-yield review, reinforce key psychology
concepts, and help you feel more prepared for final exam success.
This is an independent study resource and is not affiliated with
or endorsed by ATI Testing or the TEAS exam
, TABLE OF CONTENTS
TEAS 7 Science Exam Set 1……………………………………………. 2
TEAS 7 Science Exam Set 2………………………………………….…. 18
TEAS 7 Science Exam Set 3………………………………………….…. 31
TEAS 7 Science Bonus Qns………………………………………….…. 45
1. What describes the increase in alleles that permits a species to survive and reproduce
better in an environment from generation to generation?
a) DNA
b) Genetic drift
c) Mutation
d) adaptation
Correct Answer: d) Adaptation
Rationale: Adaptation refers to heritable traits that increase an organism’s fitness in a given
environment. Over generations, natural selection favors advantageous alleles, increasing their
frequency in the population. Mutation introduces variation, but adaptation is the outcome of
selection acting on that variation.
2. What nervous system directs the body’s fight or flight response?
a) peripheral
b) central
c) parasympathetic
d) sympathetic
Correct Answer: d) Sympathetic
Rationale: The sympathetic division of the autonomic nervous system prepares the body for
stress by increasing heart rate, dilating bronchi, and mobilizing energy stores. The
parasympathetic system, in contrast, promotes “rest and digest” functions.
3. What is used in quantitative investigations?
a) sensory information
,b) numerical information
c) phenomenological research
d) ethnographic research
Correct Answer: b) Numerical information
Rationale: Quantitative research relies on measurable, numerical data that can be statistically
analyzed. This contrasts with qualitative methods (e.g., ethnographic or phenomenological),
which focus on descriptive or experiential data.
4. Which of the following taxonomic ranks is the most general? (Order, genus, phylum,
family)
a) order
b) genus
c) phylum
d) family
Correct Answer: c) Phylum
Rationale: Taxonomic hierarchy proceeds from broad to specific: domain → kingdom →
phylum → class → order → family → genus → species. Phylum is more inclusive than order,
family, or genus.
5. Water undergoes relatively minor temperature and phase changes compared to other
substances due to both its what?
a) low specific heat and low vaporization
b) low specific heat and high heat vaporization
c) high specific heat and low heat of vaporization
d) high specific heat and high heat of vaporization
Correct Answer: d) High specific heat and high heat of vaporization
Rationale: Hydrogen bonding in water requires significant energy to break, giving water a high
specific heat (resists temperature change) and high heat of vaporization (requires much energy to
evaporate), stabilizing biological systems.
6. What is an example of hydrocarbons containing double bonds?
a) C₂H₆
b) C₄H₈
c) C₆H₁₀
d) C₈H₁₂
, Correct Answer: b) C₄H₈
Rationale: Hydrocarbons with double bonds are alkenes (general formula CₙH₂ₙ). C₄H₈ fits this
pattern, indicating at least one double bond. C₂H₆ is an alkane (single bonds only).
7. What represents the correct order of scientific process?
a) hypothesis, data, analysis
b) hypothesis, analysis, data
c) data, hypothesis, analysis
d) data, analysis, hypothesis
Correct Answer: a) Hypothesis, data, analysis
Rationale: The scientific method typically begins with a hypothesis, followed by
experimentation (data collection), and then analysis to draw conclusions.
8. What organ system supplies the body cells with oxygen and nutrients?
a) cardiovascular
b) digestive
c) nervous
d) immune
Correct Answer: a) Cardiovascular
Rationale: The cardiovascular system transports oxygen, nutrients, hormones, and waste
products via blood circulation, ensuring cellular homeostasis.
9. Through what does blood pass after leaving the right ventricle during contraction of the
heart?
a) aorta
b) pulmonary artery
c) vena cava
d) mitral valve
Correct Answer: b) Pulmonary artery
Rationale: The right ventricle pumps deoxygenated blood into the pulmonary artery, which
carries it to the lungs for gas exchange.
10. What organ system supplies the body with oxygen and removes carbon dioxide?
a) integumentary
b) endocrine
