NAS2 Challenge Exam Questions and Answers (With
Correct Solutions) Latest 2023
Purpose of Scientific Method – correct answer ✅solve a problem or answer a
question
Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude – correct
answer ✅steps of scientific method
Independent variable – correct 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 – correct 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 – correct answer ✅does not receive treatment and used to
compare or measure the other subjects
NAS2 Challenge Exam Questions and Answers (With
Correct Solutions) Latest 2023
experimental group – correct answer ✅exposed to changes in independent
variable
anatomy – correct answer ✅branch of science concerned with bodily structure of
living organisms; structure
physiology – correct answer ✅science dealing with the functions of living things
or their organs
level of organization – correct answer ✅living things arranged from the simplest
to most complex are:
organelle
cells
tissues
organs
organ systems, organism
populations communities
ecosystem
biosphere
NAS2 Challenge Exam Questions and Answers (With
Correct Solutions) Latest 2023
requirements for life – correct answer ✅Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs – correct answer ✅Food, oxygen, water, body temperature,
atmospheric pressure (oxygen/carbon dioxide exchange)
homeostasis – correct answer ✅relatively constant internal physical and chemical
conditions that organisms maintain
receptor – correct answer ✅senses environmental stimulus and sends info to
control center
control center – correct answer ✅hypothalamus
signals effector
NAS 2 Challenge Exam TCC (Questions and Answers)
(Solved)
Nucleus – Ans ☑️☑️brain of the cell, directs cell activity and contains
chromosomes made of DNA
Endoplasmic Reticulum – Ans ☑️☑️”intracellular highway”, transports items
around the cell, creates lipids of fat
Lysosome – Ans ☑️☑️An organelle containing digestive enzymes
Cytoplasm – Ans ☑️☑️A jellylike fluid inside the cell in which the organelles
are suspended
golgi apparatus – Ans ☑️☑️A system of membranes that modifies and
packages proteins for export by the cell
ribosomes – Ans ☑️☑️site of protein synthesis
mitochondria – Ans ☑️☑️Powerhouse of the cell, organelle that is the site of
ATP (energy) production
cell membrane function – Ans ☑️☑️1) keep toxic substances out of cell
2) has receptors that allow molecules to pass between organelles
3) separate vital/incompatible metabolic processes in organelles
NAS 2 Challenge Exam TCC (Questions and Answers)
(Solved)
concentration gradient – Ans ☑️☑️difference in the concentration of a
substance from one location to another
simple diffusion – Ans ☑️☑️hydrogen bonds form between water molecules
and solutes
facilitated diffusion – Ans ☑️☑️Movement of specific molecules across cell
membranes through protein channels
osmosis – Ans ☑️☑️Diffusion of water through a selectively permeable
membrane
active transport – Ans ☑️☑️the movement of ions or molecules across a cell
membrane into a region of higher concentration, assisted by enzymes and
requiring energy.
endocytosis – Ans ☑️☑️the taking in of matter by a living cell by invagination
of its membrane to form a vacuole.
exocytosis – Ans ☑️☑️a process by which the contents of a cell vacuole are
released to the exterior through fusion of the vacuole membrane with the
cell membrane.
active vs passive transport – Ans ☑️☑️active transport requires energy and
work, passive transport does not.
NAS 2 EXAM 2 TCC Questions (Solved) Latest 2023
Anything that has mass and takes up space – correct answer ✅Matter
Definite shape and volume – correct answer ✅Solid
A state of matter that has no definite shape but has a definite volume. –
correct answer ✅liquid
changeable shape and volume – correct answer ✅Gas
capacity to do work or put matter into motion – correct answer ✅Energy
energy in action – correct answer ✅kinetic energy
stored energy – correct answer ✅potential energy
stored in bonds of chemical substances – correct answer ✅chemical energy
directly involved in moving matter – correct answer ✅mechanical energy
NAS 2 EXAM 2 TCC Questions (Solved) Latest 2023
exhibits wavelike properties (X-rays, visible light) – correct answer ✅radiant
energy
Cannot be broken down by ordinary chemical means – correct answer
✅Elements
detectable with our senses or measurable – correct answer ✅physical
properties
how atoms interact (bond) with one another – correct answer ✅chemical
properties
unique building blocks for each element – correct answer ✅Atoms
consists of neutrons and proton – correct answer ✅Nucleus
no charge, 1 AMU – correct answer ✅Nuetrons