Fact 1: Ethologists usually study how animals behave in their natural environment. Fact 2: Students take a field trip to an ecosystem to observe the homes of animals in natural habitats. Given the two facts above, answer the question "Ethologists usually study how animals do what in an ecosystem?" with the following options: - raising their temperature - retaining heat - reducing acid rain - protect plants - share properties - behave in their homes - storing water - Generating heat
behave in their homes

Fact 1: When a river floods , that river deposits soil in flood plains. Fact 2: Minerals are the constituents of rocks, sediments, and soils. Given the two facts above, answer the question "What is deposited in flood plains when a river floods?" with the following options: - bamboo - detritus - shrub beds - rocks - music - filtered water - minerals - ice
minerals

Q: Fact 1: An incandescent light bulb converts electricity into light by sending electricity through a filament. Fact 2: Standard filaments are made of tungsten. Given the two facts above, answer the question "What does an incandescent light bulb use to convert electricity into light " with the following options: - energy - light - heat energy - Tungsten - heat - Neon gas - Coal - Helium
A: Tungsten

Question: Fact 1: Competition may lead to aggressive behaviors or displays of aggression. Fact 2: Aggression is the desire or intent to cause harm. Given the two facts above, answer the question "What can cause harm?" with the following options: - Sulfur dioxide - burning coal - Medical treatment - treats - Good feelings - cigarettes - competition - emissions
Answer: competition

*Question*
Fact 1: Contact between rocks over long periods of time causes rocks to smooth. Fact 2: First, limestone is a strong rock. Given the two facts above, answer the question "What causes limestone to smooth?" with the following options: - contact - coffin - hair - erosion - bacon - rainfall - friction - loose soil
**Answer**
contact

*Question*
Fact 1: Powering an electrical device with a battery requires a path for electricity to flow through a closed circuit. Fact 2: Snow is actually electrical noise that is generated by the TV receiver and other electrical devices. Given the two facts above, answer the question "powering a TV receiver with battery requires a path for electricity to flow through what" with the following options: - closed circuit - hydrogen and oxygen - water - open circuit - dormant state - outlet - satellites - an object
**Answer**
closed circuit