Free TExES 236 Practice Questions

Question 1

During a titration, a student's goggles are displaced and a drop of hydrochloric acid splashes into one eye. The student says the eye only stings slightly. What should the teacher direct the student to do first?

Accepted Answer

Begin eyewash flushing, holding the eyelids open for at least 15 minutes

Answer

Blot the eye with a damp paper towel, then reassess the irritation

Answer

Apply dilute sodium bicarbonate to neutralize the acid in the eye

Answer

Send the student to the school nurse before starting decontamination

Question 2

On a straight track, east is positive. A cart has a velocity of -8.0 m/s and a constant acceleration of +2.0 m/s² for 3.0 s. Which description matches its motion at the end of the interval?

Accepted Answer

It is moving west at 2.0 m/s and has slowed down

Answer

It is moving west at 14.0 m/s and has sped up

Answer

It is moving east at 2.0 m/s and is speeding up

Answer

It is momentarily at rest because the positive acceleration has exactly canceled its initial velocity

Question 3

The ions O²⁻, F⁻, Na⁺, and Mg²⁺ each contain 10 electrons. Which ion has the smallest radius, and why?

Accepted Answer

Mg²⁺, because 12 protons attract the same 10-electron cloud most strongly

Answer

O²⁻, because oxygen is farthest left in its period

Answer

F⁻, because fluorine has the greatest electronegativity and therefore must form the smallest ion

Answer

Na⁺, because losing one valence electron always produces the smallest ion

Question 4

A red blood cell contains a higher concentration of nonpenetrating solutes than the surrounding solution. Its membrane is permeable to water but not to those solutes. What is the cell's initial response?

Accepted Answer

Water enters the cell, causing it to swell

Answer

Water leaves the cell, and the membrane crenates

Answer

Solute leaves the cell until both concentrations are equal

Answer

There is no net water movement because the solutes cannot cross

Question 5

An unaffected woman is heterozygous for an X-linked recessive allele, and the father is unaffected. Assuming equal probability of male and female births, what is the probability that their next child will be an affected son?

Accepted Answer

25%; half are sons, and half of the sons inherit the allele

Answer

0%; an unaffected father cannot have an affected son

Answer

50%; every son who inherits the allele is affected, so sex can be ignored

Answer

12.5%; the recessive allele must be inherited from both parents

Question 6

Seismologists map a deep-ocean trench offshore, a volcanic mountain chain on the nearby continent, and earthquake foci that become progressively deeper beneath the continent. Which tectonic setting best explains all three observations?

Accepted Answer

An oceanic plate subducting beneath a continental plate

Answer

A continental rift where two continental plates move apart

Answer

A transform boundary where plates slide horizontally past each other

Answer

A continent-continent collision after the intervening ocean crust is consumed

Question 7

An ideal 12.0 V source powers a 6.0 Ω resistor and a 3.0 Ω resistor connected in parallel. An ideal 5.0 A fuse, defined to open whenever source current exceeds 5.0 A, is in series with the source. What happens when the circuit is closed?

Accepted Answer

The source current is 6.0 A, so the fuse opens

Answer

The source current is 4.0 A, so the fuse remains closed

Answer

The source current is 2.0 A, so the fuse remains closed

Answer

The source current is 1.33 A, so the fuse remains closed

Question 8

In a functioning Zn|Zn²⁺ || Cu²⁺|Cu galvanic cell, zinc is the anode and copper is the cathode. After the cell has delivered current for several minutes, which combination of observations is expected?

Accepted Answer

Zinc loses mass while copper gains mass, and electrons flow from zinc to copper

Answer

Both electrodes gain mass, and electrons pass through the salt bridge from copper to zinc

Answer

Zinc gains mass while copper loses mass, and electrons flow from copper to zinc

Answer

Both electrodes lose mass, and electrons move through the solution from zinc to copper

Question 9

Students insist that summer occurs because Earth is closer to the Sun. Which instructional response is most likely to produce durable conceptual change?

Accepted Answer

Elicit predictions, test them with solar-angle and day-length evidence, and have students revise their model

Answer

State the correct explanation, then assign the definition for memorization

Answer

Delay the topic until students can derive Kepler's laws mathematically

Answer

Replace the model activity with reading so the misconception is not reinforced

Question 10

On a rocky shore, researchers remove a predatory sea star from several plots while leaving matched plots undisturbed. Mussels then monopolize space in the removal plots, and species richness declines. Which conclusion best fits the evidence?

Accepted Answer

The sea star functions as a keystone predator by suppressing a competitively dominant mussel

Answer

The pattern demonstrates bottom-up control by nutrients rather than top-down control

Answer

Mussel dominance increased niche partitioning, which should raise species richness

Answer

Sea-star removal reduced carrying capacity equally for every species in the plots

Free TExES 236 Practice Questions

Domain 1: Scientific Inquiry and Processes 10% of exam

Question 1

Domain 2: Physics 20% of exam

Question 2

Question 3

Domain 3: Chemistry 20% of exam

Question 4

Question 5

Domain 4: Cell Structure and Processes 8% of exam

Question 6

Domain 5: Heredity and Evolution of Life 8% of exam

Question 7

Domain 7: Interdependence of Life and Environmental Systems 6% of exam

Question 8

Domain 8: Earth’s History and the Structure and Function of Earth Systems 9% of exam

Question 9

Domain 10: Science Learning, Instruction and Assessment 5% of exam

Question 10

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