1. Which of the following is a scalar quantity?
velocity
displacement
acceleration
momentum
2. Which of the following is the smallest distance?
1 nm
1 m
1 km
1 mm
3. What is a name for a substance that cannot be broken down into other substances?
molecule
ion
compound
element
4. What type of bond joins most biological molecules?
peptide
hydrogen
ionic
covalent
5. What is another name for an atom or molecule that has gained or lost electrons?
polymer
acid
ion
base
6. What kind of tissue is on the outside of the body and the lining of the internal organs?
muscle
nervous
epithelial
connective
7. In an experiment, what is the name of the variable that is manipulated by the scientist?
internal variable
external variable
independent variable
dependent variable
8. What structure controls the inflow and outflow of materials in a cell?
cell membrane
nucleus
ribosome
mitochondria
9. Which of the following is a characteristic of an aneroid barometer?
its metal chamber does not respond to changes in air pressure
it displays air pressure on a dial
it is composed of a glass tube partially filled with mercury
it contains no liquid
10. What kind of air mass forms over an ocean?
maritime
polar
continental
oceanic
11. Areas of scientific study include:
Natural
Social
Formal
All of the above
12. Scientific method is used to:
Memorize data
Interpret information
Integrate information
All of the above
13. Which step is not part of the scientific method?
Question posed
Research done
Earlier tests are ignored
Analysis
14. The unifying principles of biology include:
Chemical composition
Evolution
Algebraic equations
All of the above
15. The disciplines of physics are:
Condensed matter and high energy
Gene Theories
Evolution
All of the above
16. Which of the following is not a law of physics?
Newton’s Three Laws of Motion
Equivalence and Balance
Laws of Thermodynamics
Invariance of the Speed of Light
17. Chemistry studies matter in relation to:
Evolution
Entropy
The environment
All of the above
18. Which of the following is not a discipline in chemistry?
Organic
Biochemistry
Molecular
Analytical
19. The solar system is composed of:
Igneous rock
Dwarf planets
Marine wildlife
All of the above
20. Students studying science should be assessed on their ability to:
Memorize data
Communicate scientific subject matter
Get good grades
All of the above
Praxis II Middle School Science Test Answer Key