*Question*
You are presented with the question "what increases when fossil fuels are burned?" and the following answer choices: - Greenhouse gasses - Greenhouse gases - cancer - wood ash - atmospheric warming - coal - heat energy - Temperature Now knowing that burning fossil fuels increases the carbon in the atmosphere and more carbon in the atmosphere means atmospheric warming, choose the best answer.
**Answer**
atmospheric warming

*Question*
You are presented with the question "What does acid rain have a negative impact on?" and the following answer choices: - limestone - watershed - animals - humans - nitrogen - plants - soils - hydrogen Now knowing that acid rain has a negative impact on water quality and plants thrive on quality water, choose the best answer.
**Answer**
plants

*Question*
You are presented with the question "What often requires a lot of energy?" and the following answer choices: - pigeons - monkeys - horizon - growth - humans - omnivores - waiting - distance Now knowing that cell division often causes growth and cell division is relatively slow and requires a lot of energy, choose the best answer.
**Answer**
growth

*Question*
You are presented with the question "Metals become what readily" and the following answer choices: - acid - evaporated - fats - zinc - penetrated - hot - permeable - rust Now knowing that if heat is conducted to an object then that object will become hot and metals conduct heat well, choose the best answer.
**Answer**
hot