Experience the Quality With Free PAX Exam Questions That Helps Candidates Pass

Nitrogen makes up about 78% of Earth’s atmosphere. Oxygen is about 21%, argon about 0.9%, carbon dioxide about 0.04%. On PAX, atmospheric composition is a common physical science question. Mnemonic: “Air = mostly nitrogen.”

First division: 18 ÷ 3 = 6. Then multiplication: 4 × 2 = 8. Add: 6 + 8 = 14. Option B is correct. On PAX, apply order of operations carefully to avoid errors.

“Abundant” means plentiful or existing in large quantities. The opposite is “scarce,” meaning in short supply. Options A, C, and D are synonyms, not antonyms. PAX verbal antonym items often surround the correct answer with distractor synonyms, testing precision. A quick strategy: think of a sentence such as “water is abundant in the river” and replace with each option; only “scarce” changes the meaning correctly.

Divide total cost by number of pencils: $2.50 ÷ 5 = $0.50. Option D is correct. Option A ($0.25) misdivides by 10. Option B and C are approximations. On PAX, unit price problems are common in everyday math applications.

The Golgi apparatus modifies, sorts, and packages proteins for transport inside or outside the cell. Nucleus (A) stores DNA. Mitochondria (B) make ATP. Ribosomes (D) synthesize proteins but do not package them. PAX science often tests organelle functions.