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Teachers' Professional License – Subject Test: Science 2: free practice test

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Practice test questions with answers and explanations

Try the questions in the test above first, then open each one here to see the correct answer and why every other option is wrong.

01The author of the book “Kitab al-Manazir” (Book of Optics) is the scholar:

Past exam question Unit: History, Nature and Integration of Science

  1. AIbn Sina (Avicenna)

    Ibn Sina is known for “The Canon of Medicine,” not the Book of Optics.

  2. BIbn al-Haytham ✓ Correct answer

    Ibn al-Haytham wrote the Book of Optics, showing that vision occurs when light reflected from objects enters the eye, and relied on experiment.

  3. CAbu al-Rayhan al-Biruni

    Al-Biruni is known for his work in astronomy, geography and measuring the Earth.

  4. DAl-Khwarizmi

    Al-Khwarizmi is known for algebra and arithmetic, not optics.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.1 (nature of science and its history), indicator 3, p. 8

02In 1665, when Robert Hooke examined a thin slice of cork under a microscope, he observed small adjoining units that he named:

Past exam question Unit: Biology

  1. ATissues

    Tissues are groups of similar cells; Hooke did not describe that level.

  2. BSystems

    Systems are a much higher level of organization than the cell.

  3. CCells ✓ Correct answer

    Hooke saw small chambers in cork and named them cells, the first description of cells.

  4. DPlastids

    Plastids are organelles of living plant cells and are not seen in dead cork tissue.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.6 (characteristics and structure of living things), indicator 3, p. 9

03Why are viruses not classified in any of the kingdoms?

Past exam question Unit: Biology

  1. ABecause they are non-cellular and can reproduce only inside a living cell. ✓ Correct answer

    Viruses are not made of cells and can multiply only inside a living host cell, so they lack the full set of living characteristics and are left out of the kingdoms.

  2. BBecause a protein coat surrounds their genetic material.

    Having a protein coat does not stop an organism from being placed in a kingdom; viruses are excluded for another reason.

  3. CBecause they have no nucleus enclosed by a nuclear membrane.

    Bacteria also lack a membrane-bound nucleus, yet they belong to kingdoms.

  4. DBecause they are too small to be seen with a light microscope.

    Size is not a basis of classification; many bacteria are visible only under a microscope and are still classified.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.7 (biodiversity and classification), indicator 2, p. 9

04Igneous rocks change into metamorphic rocks under the influence of:

Past exam question Unit: Earth Science and Astronomy

  1. Acompaction of its grains after they settle in layers

    This process forms sedimentary rock.

  2. Bmagma freezing near Earth's surface

    This forms igneous rock itself, not metamorphic rock.

  3. Cbreakdown by wind and running water

    This is weathering and erosion, which produce sediment, not metamorphic rock.

  4. Dhigh heat and great pressure ✓ Correct answer

    Heat and pressure deep in the Earth alter the rock's minerals and texture without fully melting it, forming metamorphic rock.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.12 (Earth's structure, properties and processes), indicator 5, p. 10

05How many moles are in 88 g of propane (C₃H₈)? (H = 1, C = 12)

Past exam question Unit: Chemistry

  1. A2 mol ✓ Correct answer

    The molar mass of propane = 3 × 12 + 8 × 1 = 44 g/mol, so moles = 88 ÷ 44 = 2 mol.

  2. B4 mol

    This comes from dividing 88 by 22; the correct divisor is the molar mass of propane, 44 g/mol, not 22.

  3. C8 mol

    This confuses the number of hydrogen atoms in a propane molecule (8) with the number of moles.

  4. D6 mol

    6 mol of propane would have a mass of 264 g, not 88 g, so this value does not come from a correct division.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.15 (chemical calculations and equations), indicator 1, p. 11; n = m/M

06In which of the following is the solution most concentrated?

Past exam question Unit: Chemistry

  1. A5 g of solute in 10 g of solvent

    The ratio 5 to 10 is 0.5 g solute per 1 g solvent, one of the lowest.

  2. B30 g of solute in 20 g of solvent

    The ratio 30 to 20 is 1.5, higher than 0.5 but lower than 2.

  3. C10 g of solute in 20 g of solvent

    The ratio 10 to 20 is only 0.5, so it is less concentrated than the others.

  4. D20 g of solute in 10 g of solvent ✓ Correct answer

    The ratio 20 to 10 is 2 g solute per 1 g solvent, the highest of the options.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.16 (solution chemistry and calculations), indicator 2, p. 11

07When a catalyst is added to a chemical reaction, it:

Past exam question Unit: Chemistry

  1. Araises the activation energy of the reaction

    Raising activation energy slows a reaction; that is the effect of an inhibitor, not a catalyst.

  2. Bshifts the equilibrium position toward the products

    A catalyst speeds up reaching equilibrium in both directions without changing its position.

  3. Clowers the activation energy through an alternative pathway ✓ Correct answer

    A catalyst provides an alternative pathway with lower activation energy, so the reaction speeds up.

  4. Dis completely used up during the reaction

    A catalyst is recovered unchanged at the end of the reaction.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.17 (chemical kinetics and thermochemistry), indicator 2, p. 12

08A 100 g ball and a 200 g wooden board are dropped together from the same height, ignoring air effects. Which reaches the ground first?

Past exam question Unit: Physics

  1. AThey arrive at the same instant ✓ Correct answer

    Correct: with no air resistance every object accelerates at the same g regardless of mass.

  2. BThe ball, because its mass is smaller

    A smaller mass does not fall faster; the acceleration does not depend on mass.

  3. CThe board, because Earth pulls it harder

    Earth does pull the board harder, but its inertia is greater in the same proportion, so the acceleration is the same.

  4. DIt depends on the height they fall from

    Height sets the fall time for both together and favors neither.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.22 (forces and motion), indicator 4, p. 13; a = g for all masses

09A ray of light entering glass from air at an angle bends toward the normal. The reason is that:

Past exam question Unit: Physics

  1. Alight travels faster in glass than in air

    If the speed increased, the ray would bend away from the normal.

  2. Bglass is optically less dense than air

    Glass is optically denser than air, not less dense.

  3. Clight travels more slowly in glass than in air ✓ Correct answer

    Correct: on entering a medium where light is slower, the ray bends toward the normal.

  4. Dglass absorbs light and does not transmit it

    Glass is transparent and transmits most light, so absorption does not explain the bending.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.28 (light), indicator 3, p. 14

10To study the effect of distance learning on student achievement, the scores of students learning remotely were compared with those of students attending school in person. The students attending school represent:

Past exam question Unit: Science Teaching

  1. AThe control sample ✓ Correct answer

    The control sample is not exposed to the factor under study and serves for comparison, here the students attending school.

  2. BThe independent variable

    The independent variable is the factor changed, here the mode of learning, not a group of students.

  3. CThe dependent variable

    The dependent variable is what is measured, here achievement, not the students themselves.

  4. DThe experimental sample

    The experimental sample is the one exposed to the factor under study, here the remote learners.

Reference: ETEC Science Teacher Standards – Level 2 (2020), Standard 6.5.31 (science teaching strategies and assessment methods), indicator 6, p. 15

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