Plasma is formed by electrons separating from atoms in stars, and most of the universe is in the plasma state. Given these facts, most of the universe is composed of what separated from atoms in stars among the following options: - energy - Joules - nucleus - matter - oxygen - RNA - atoms - Energy.
atoms

Cutting down trees has a negative impact on an ecosystem, and trees are cut down in the forest and are then sent to a paper mill. Given these facts, a what can have a negative impact on ecosystem among the following options: - paper mill - A virus - deforestation - storm - disease - rainfall - tree - Pollution
paper mill

Q: An earthquake causes the ground to shake, and examples include damage to man-made structures, ground failure and felt shaking. Given these facts, what causes damage to man-made structures among the following options: - flooding - air quality - animal crossings - earthquakes - toxins - trees bending - influenza - Pesticides
A: earthquakes

Question: Hitting an object causes the particles in that object to vibrate, and frequency is the measurable rate of that vibration. Given these facts, what changes to the particles of an object when hit among the following options: - Temperature - frequency - Energy. - volume - molecules - density - energy - heat energy
Answer: frequency

*Question*
Burning wood is used to produce heat, and air pollution is created by burning. Given these facts, what causes air pollution among the following options: - Smoking - cigarettes - producing heat - Electrical energy - oxygen - chemical reaction - wind turbines - clouds
**Answer**
producing heat

The emission of sulfur dioxide causes acid rain, and polluted rain is called acid rain . Given these facts, what causes pollution in rain among the following options: - sulfur dioxide - carbon dioxide - nitrogen - contamination - smog - hydrogen - fossil fuels - flooding
sulfur dioxide