If cars harm the respiratory and circulatory systems, then what harms the respiratory and circulatory systems? Answer choices: - oil - rain - sulfur - cars - tires - coal - tar - bicycles
cars

If gases from burning coal and oil dissolving in water in the atmosphere can destroy soil, then gasses from burning coal can lead to what? Answer choices: - soil destruction - nuclear power - Electrical energy - Pollution - grass - flow of electrons - radio waves - heat energy
soil destruction

Q: If deciduous trees have leaves that change color when summer fades, then during what time frame do deciduous trees' leaves change color? Answer choices: - summer end - dry and hot - summer start - barrel-shaped - dry conditions - winter - after winter - climate
A: summer end

Question: If carbon cycles quickly between organisms and the blanket of air around the earth, then carbon cycles quickly between organisms and? Answer choices: - O2 - DNA - comets - air - Aves - ocean - satellites - lung
Answer: air

*Question*
If ravens absorb all visible light, then what absorbs all visible light? Answer choices: - Energy. - ravens - bushes - photons - our star - Jellyfish - bamboo - barnacles
**Answer**
ravens

If operating an automobile contributes to Global warming, then what contributes to global warming? Answer choices: - using wind farms - recycling - burning coal - Greenhouse gases - operating an automobile - chlorofluorocarbons - Greenhouse gasses - nuclear energy
operating an automobile