NAS2 CHALLENGE TEST PAPER 2026 EXAM
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
● Order and describe the steps of the scientific method. Answer:
Question, Hypothesis, Experiment, Observe & Record, Analyze,
Conclude
● Independent variable Answer: a variable that stands alone and isn't
changed by the other variables you are trying to measure, change or
controlled example: age
● dependent variable Answer: a variable dependent on other factors,
tested or measured example: test score - factors that go into a score you
receive on a test
● control group Answer: does not receive treatment and used to compare
or measure the other subjects
● Hypothesis Answer: A testable prediction, often implied by a theory
,● Theory Answer: A hypothesis that has been tested with a significant
amount of data
● Sample Size Answer: the number of times a measurement is replicated
in data collection
● Trials Answer: the number of times an experiment is repeated
● Placebo Answer: something which has a positive mental effect, but no
physical effect
● Constants/Controlled Variables Answer: the conditions of the
experiment that we keep the same.
● Identify the parts of the compound light microscope and describe their
functions. Answer: https://microscopeinternational.com/compound-
microscope-
parts/#:~:text=Monocular%20or%20Binocular%20Head%3A%20Struct
ural,which%20objective%20lens%20is%20active.
● Describe basic technique for using the compound light microscope.
Answer: https://www.microscope.com/how-to-use-a-compound-
microscope/
, ● Explain how to calculate the total magnification of a microscope.
Answer: take the power of the objective (4X, 10X, 40x) and multiply by
the power of the eyepiece, usually 10X.
● Describe how increases in magnification affect the working distance,
depth of field, and field of view. Answer: As the magnification increases,
the depth of field decreases.
● Define Anatomy Answer: the study of the structure of the body
● Define Physiology Answer: study of the function of the body
● Order and describe the levels of organization (chemical, cell, tissue,
organ, organ system, organism). Answer: Chemical:
Cell: smallest independently functioning unit of a living organism
Tissue: group of many similar cells (though sometimes composed of a
few related types) that work together to perform a specific function
Organ: anatomically distinct structure of the body composed of two or
more tissue types
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
● Order and describe the steps of the scientific method. Answer:
Question, Hypothesis, Experiment, Observe & Record, Analyze,
Conclude
● Independent variable Answer: a variable that stands alone and isn't
changed by the other variables you are trying to measure, change or
controlled example: age
● dependent variable Answer: a variable dependent on other factors,
tested or measured example: test score - factors that go into a score you
receive on a test
● control group Answer: does not receive treatment and used to compare
or measure the other subjects
● Hypothesis Answer: A testable prediction, often implied by a theory
,● Theory Answer: A hypothesis that has been tested with a significant
amount of data
● Sample Size Answer: the number of times a measurement is replicated
in data collection
● Trials Answer: the number of times an experiment is repeated
● Placebo Answer: something which has a positive mental effect, but no
physical effect
● Constants/Controlled Variables Answer: the conditions of the
experiment that we keep the same.
● Identify the parts of the compound light microscope and describe their
functions. Answer: https://microscopeinternational.com/compound-
microscope-
parts/#:~:text=Monocular%20or%20Binocular%20Head%3A%20Struct
ural,which%20objective%20lens%20is%20active.
● Describe basic technique for using the compound light microscope.
Answer: https://www.microscope.com/how-to-use-a-compound-
microscope/
, ● Explain how to calculate the total magnification of a microscope.
Answer: take the power of the objective (4X, 10X, 40x) and multiply by
the power of the eyepiece, usually 10X.
● Describe how increases in magnification affect the working distance,
depth of field, and field of view. Answer: As the magnification increases,
the depth of field decreases.
● Define Anatomy Answer: the study of the structure of the body
● Define Physiology Answer: study of the function of the body
● Order and describe the levels of organization (chemical, cell, tissue,
organ, organ system, organism). Answer: Chemical:
Cell: smallest independently functioning unit of a living organism
Tissue: group of many similar cells (though sometimes composed of a
few related types) that work together to perform a specific function
Organ: anatomically distinct structure of the body composed of two or
more tissue types
