The Praxis General Science: Content Knowledge (5435) exam is a test required by many states for credential candidates planning to teach science at a high school level. It is a single, computer-delivered test that includes questions from five content domains.

The content categories are Scientific Methodology, Techniques, and History; Physical Science; Life Science; Earth and Space Science; and Science, Technology, and Society.

Praxis II General Science Content Knowledge (5435) Exam Practice

Time left 00:00

25 Questions

1. Observe the following diagram of a complete, perfect flower

The structure in which microspores are produced.

1342

2. Which of the following ideas most aligns with Darwin's work in On the Origin of Species?

Human populations will rapidly increase unless kept in check by limits in food supply.If an organism changes during its life in order to adapt to its environment, those changes are passed on to its offspring.The geological processes that alter the earth are uniform through time.Nature selects the best adapted varieties to survive and reproduce.

3. Which of the following wastes may be suitable for sink or sewer disposal?

Acetic AcidMercuryBenzeneAcetone

4. Which of the atomic models listed below is the most recent?

Dalton's atomic modelRutherford's atomic modelThomson'sBohr's

5. Consider the following statements about Newton's law: I.  A newton is a fundamental unit. II.  Mass and acceleration are inversely related when the force is constant. III.  Newton's first law can be derived from Newton's second law. IV.  Newton's second law can be derived from the universal law of gravity. Which of the following statements are true?

I, II, III, and IV are not true.III only.I, II, and III.II and III only.

6. Which of the following is NOT supported by Dalton's Atomic Theory of Matter?

Differences in properties of elements are due to differences in the atoms of the elements.Atoms of a particular element all have the same properties such as size and mass.Chemical processes result from the rearrangement, combination and separation of atoms.Every element consists of tiny particles called atoms which can be split into even smaller pieces.

7. Minerals that form on the sea floor from discarded shells are most likely part of which chemical class?

CarbonateSilicateSulfateOrganic

8. Which of the following demonstrations best illustrates Newton's first law?

Giving a billiard ball at rest on a smooth level table a small push and letting it roll on the table.Trying without success to move a heavy bureau or filing cabinet on the floor.Dragging a box on a table at a constant speed by exerting a force just enough to overcome the force of friction.Running a current through two parallel wires.

9. How much does it cost to operate a 5 kilowatt electric motor for 12 hours if electricity is 6 cents per kilowatt-hour?

$14.40$360$0.025$3.60

10. Consider the two vectors below:
Which vector best represents the vector obtained by subtracting A from B (
)?

DABC

11. The most recently formed parts of the Earth's crust can be found at:

Compressional boundariesMid-ocean ridgesExtensional boundariesSubduction zones

12. Which of the following types of igneous rock solidifies deepest beneath the Earth's surface?

HypabyssalPlutonicVolcanicDetrital

13. Which of the following statements is true of rocks such as olivine that are found at the top of Bowen's reaction series?

They are classified as metamorphic.None of theseThey crystallize at lower temperatures than rocks found at the bottom of the series.They weather more quickly than rocks found lower in the series.

14. The process that causes lithospheric plates to move over the surface of the mantle is called:

Tension.Conduction.Convection.Subduction.

15. Two waves, each of which has an amplitude of A, cross paths. At the point where they cross, the peak of one wave meets the trough of another wave. What is the resulting amplitude at the point where the waves cross?

-AA2A0

16. Which of the following types of chemicals are considered generally unsafe to store together? I.  Liquids and solids II.  Acids and bases III.  Reducing agents and oxidizing agents IV.  Metals and salts

I, IVIII, IVI, IIII, III

17. Which of the following structures is NOT present in gymnosperms?

FlowersStomataLeavesPollen

18. When two tectonic plates are moving laterally in opposing directions, this is called a:

CompressionalOppositionalLateral boundary.Transformational boundary.

19. Suppose a moving railroad car collides with an identical stationary railroad car and the two cars latch together. Ignoring friction, and assuming no deformation on impact, which of the following statements is true?

The collision is elastic.The speed of the first car decreases by half.There is no determining the final speed because the collision was inelastic.The speed of the first car is doubled.

20. Which of the following processes is an example of positive feedback?

Low blood oxygen levels stimulate erythropoietin production which increases red blood cell production by bone marrowIncreased nursing stimulates increased milk production in mammary glandsHigh blood glucose levels stimulate insulin release, which makes muscle and liver cells take in glucoseHigh CO2 blood levels stimulate respiration which decreases blood CO2 levels

21. Adding a catalyst to a reaction will do which of the following to that reaction:

Increase the temperature of the reactionShift the reaction equilibrium towards the productsIncrease the purity of the reaction productsDecrease the energy of activation for the reaction

22. Which of the following statements best explains what is meant by the phase of a wave?

An angle indicating the wave cycle's instantaneous location.The length of a wave in 2π radians.The height of a wave in 2π radians.The period of oscillation of a wave.

23. Which of the following plant hormones is most likely to delay aging when sprayed on cut flowers and fruit?

EthyleneGibberellinsCytokininsAbscisic acid

24. When lighting a Bunsen burner, the flame is luminous yellow. Which of the following procedures is the correct way to properly adjust this flame?

Decrease the air supplyIncreaseDecrease the gas supplyIncrease the gas supply

25. When working with chemicals in a laboratory which of the following describes the use of appropriate apparel?

Always wear goggles and aprons or lab coats. Wear gloves when needed.Always wear gloves and aprons or lab coats. Wear goggles when needed.Always wear goggles and gloves. Wear aprons or lab coats when needed.Always wear aprons or lab coats. Wear gloves and goggles when needed.