TASK DEFINITION: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
PROBLEM: Fact1: All chemical reactions require activation energy to get started., Fact2: Chemical changes are a result of chemical reactions., Question: What is required before a chemical change? (A) kinetic energy (B) energy usage (C) activation push (D) activation energy (E) activation switch (F) activation power (G) Burning fuel and air (H) Evaporation

SOLUTION: D

PROBLEM: Fact1: a pesticide is used for protecting plants by killing insects, Fact2: Pesticides also kill beneficial insects that pollinate flowers and prey upon harmful insects., Question: What is used for protecting plants while killing beneficial pollinators? (A) watering cans (B) dangerous (C) toxins (D) pesticide (E) irrigation (F) exoskeleton (G) steroids (H) plant food

SOLUTION: D

PROBLEM: Fact1: chemical weathering causes iron in rock to oxidize, Fact2: Low rainfall means slow chemical weathering of rock., Question: What can lead to oxidation of iron in rock? (A) heat energy (B) low rainfall (C) flow of electrons (D) permineralization (E) fossil fuels (F) harmful substances (G) boiling (H) evaporation

SOLUTION:
B