input with options: Q: Energy is lost as heat between each trophic level due to the second law of what? A:
OPTIONS:
- reactions
- particles
- chemistry
- thermodynamics
output: thermodynamics

Q: Q: When iron and sulfur are mixed together in a certain ratio and heated, what do they become? A:

OPTIONS:
- iron oxide
- rust
- sulfuric acid
- iron sulfide

A: iron sulfide

input: OPTIONS:
- algae
- vapor
- energy
- liquid Now, answer this question: Q: What type of matter often sinks into cracks between rocks? A:
A:
output: liquid

Q: All of the living things in an area and the nonliving environment together make up what? A:

OPTIONS:
- biosphere
- biome
- taiga
- ecosystem

Answer: ecosystem

Problem: OPTIONS:
- cellular network
- radio waves
- compass
- gps
Q: Q: What do we call the worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations? A:
Answer: gps

Q: What element is essential for amino acid and nucleic acid production? A:

OPTIONS:
- oxygen
- carbon
- hydrogen
- nitrogen

Answer:
nitrogen