Fact 1: Landfills have a negative impact on the environment. Fact 2: Trash ends up in landfills . Given the two facts above, answer the question "What has a negative impact on the environment?" with the following options: - trash - wind - disease - recycling - carbon offsets - mines - deserts - nature
trash

Fact 1: Plants that shed their leaves seasonally each year are called deciduous plants. Fact 2: Trees here are largely deciduous, shedding their leaves in the dry season. Given the two facts above, answer the question "Plants shed their leaves in what season each year?" with the following options: - spring season - wet season - firing season - Summer - When it's cold - colder weather - Winter - dry season
dry season

Q: Fact 1: Biofuel is used to produce electricity by burning. Fact 2: Energy is created when objects are burned. Given the two facts above, answer the question "What is biofuel used to produce?" with the following options: - disease - chemicals - waste - bamboo - engines - sleep - energy - food
A: energy

Question: Fact 1: Hydrogen bonds cause water to expand when it freezes. Fact 2: Water freezes into ice when cooled. Given the two facts above, answer the question "What causes water to expand as it becomes ice?" with the following options: - evaporation - wind - Weathering - heat - gasoline - Generating heat - friction - hydrogen bonds
Answer: hydrogen bonds

*Question*
Fact 1: Contact between rocks over long periods of time causes rocks to smooth. Fact 2: Because of the big wave action, the rocks are very smooth. Given the two facts above, answer the question "What causes contact between rocks?" with the following options: - wind - heat - erosion - deltas - waves - motion - seasons - rivers
**Answer**
waves

Q: Fact 1: Many plants respond to the days growing shorter in the fall by going dormant. Fact 2: Trees are dormant from November to March. Given the two facts above, answer the question "When do many trees respond to the days growing shorter?" with the following options: - air cools - Winter - wind - in fall - in summer - autumn - late winter - in spring
A: in fall