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

Times decrease (15 → 10 → 5) as temperature rises. Choice A matches. B contradicts. C and D are false. ACT Science often presents inverse trends—here, higher temperature = faster reaction.

The subject is “box,” singular. The prepositional phrase “of old books” does not change that. Therefore, “is” is correct. Choices A, B, and D incorrectly use plural verbs. On ACT English, agreement questions often trick test-takers by placing plural nouns near the verb.

Fast charger = 1 hour, the shortest time. Therefore, most efficient. Choice A is correct. B contradicts. C is false. D is wrong. ACT Science usually asks which condition produces the best performance—look for the extreme value.

Ice melted faster in salted water (5 min) than pure water (8 min). That shows salt speeds melting. Choice A is correct. Choices B, C, and D contradict. On ACT Science, link the independent variable (salt presence) to dependent variable (melting time).

Perimeter formula: P=4sP=4s. 48=4s48=4s. Divide both sides: s=12s=12. Correct answer: C. Other options reflect common missteps. ACT Math frequently uses basic geometry—memorize perimeter and area formulas.