Physical Science EOG GMAS Study Guide Questions

The half-life of cadmium-109 is 464 days. A scientist measures out a 256.0 gram (g) sample. Approximately how many grams of cadmium-109 would remain after 1,392 days?

• A. 32.0 g

• B. 64.0 g

• C. 2,048.0 g

• D. 1,024.0 g

The elements neon and argon are not reactive. Which hypothesis BEST explains this?

• A. They are not stable atoms.

• B. They are not readily available on Earth.

• C. They tend to give up all of their valence electrons easily.

• D. They have the maximum possible number of electrons in their outermost shell.

A group of students proposed four different models to show the fusion of hydrogen to form helium. The key to the models is shown. Which model shows the process of nuclear fusion?

• Model A

• Model B

• Model C

• Model D

Tags

NGSS.HS-PS1-8

A student is modeling the fission of uranium nuclei. The student started the model as shown in the diagram. Which TWO particles should the student add to the right-hand side of the model to complete the fission reaction?

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Tags

NGSS.HS-PS1-8

A student is modeling the units in the formula for aluminum sulfide using the spheres shown below to represent aluminum (Al) and sulfur (S) atoms. Which model correctly shows a stable ionic compound for aluminum sulfide?

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Tags

NGSS.MS-PS1-1

Use the chemical equation provided to answer the question. What coefficients of Fe, O₂, and Fe₂O₃ will show that matter is conserved in this chemical reaction?

• 2, 1, 2

• 2, 3, 2

• 4, 1, 2

• 4, 3, 2

Tags

NGSS.MS-PS1-5

According to the graph showing the solubility of potassium nitrate (KNO3) in water as a function of temperature, what is the maximum approximate mass of KNO3 that would dissolve at 60°C and what is the relationship between temperature and solubility?

• The mass is approximately 140 g; increased temperatures lead to a decrease in solubility.

• The mass is approximately 110 g; increased temperatures lead to an increase in solubility.

• The mass is approximately 140 g; increased temperatures lead to an increase in solubility.

• The mass is approximately 110 g; increased temperatures lead to a decrease in solubility.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Based on the predicted dissolving times for trials 1, 3, and 4, which statement contains the BEST prediction for the dissolving time in trial 2?

• 5 minutes, because the larger diameter of crystals increases the total surface area of the solute exposed to the solvent, decreasing the length of exposure to the solvent

• 15 minutes, because the larger diameter of crystals increases the total surface area of the solute exposed to the solvent, increasing the length of exposure to the solvent

• 20 minutes, because the larger diameter of crystals decreases the total surface area of the solute exposed to the solvent, but the length of exposure to the solvent stays the same

• 30 minutes, because the larger diameter of crystals decreases the total surface area of the solute exposed to the solvent, increasing the length of exposure to the solvent

Tags

NGSS.MS-PS1-2

How should the student design investigation 3 to finish testing the factors that affect the dissolving rate of KCl?

• Increase the diameter of crystals to 2.0 mm. Keep the temperature at 40°C. Do not stir the solution.

• Keep the diameter of crystals at 1.0 mm. Keep the temperature at 20°C. Stir the solution.

• Increase the diameter of crystals to 4.0 mm. Decrease the temperature to 0°C. Do not stir the solution.

• Keep the diameter of crystals at 1.0 mm. Increase the temperature to 60°C. Stir the solution.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which action should the student take in step 3 to determine the speed of the car, and which analysis of the speed of the car is correct?

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Tags

NGSS.MS-PS3-1