Chemical weathering causes iron in rock to oxidize, and when iron oxidizes it produces iron oxide, more commonly referred to as rust. Given these facts, rust of iron in rocks is a direct result of among the following options: - solar heating - high speed fall from space - Chemical energy - The area was once underwater - permineralization - Temperature - volcanic ejection - chemical weathering
chemical weathering

(Question)
When an electrical circuit is working properly , electrical current runs through that circuit, and electrical power in a circuit is equal to the product of the current and voltage in that circuit. Given these facts, electrical power does what when it runs through the circuit among the following options: - lowered energy cost - works properly - get started - power failure - breaks down - powers off - to move people - heat energy
(Answer)
works properly

Ques: Pressure receptors are found mainly in the skin, and different receptors for heat and cold are probably present in the skin. Given these facts, the skin has points on it to feel what among the following options: - staying warm - Temperature changing - electromagnetic energy - pressure heat and cold - preventing heat transfer - light and dark - vibrational shifts - emotions
Ans: pressure heat and cold

(Q).
Acavern is formed by carbonic acid in groundwater seeping through rock and dissolving limestone, and when carbon dioxide is in water, it creates carbonic acid. Given these facts, what forms caverns by seeping through rock and dissolving limestone among the following options: - pure oxygen - Something with a head, thorax, and abdomen - basic building blocks of life - carbon dioxide in groundwater - magma in groundwater - oxygen in groundwater - At the peak of a mountain - underground systems
(A).
carbon dioxide in groundwater

Ques:Using a gasoline engine requires burning gasoline, and gasoline is used in cars, boats, motorcycles, lawn mowers and other engines. Given these facts, what does using a car require among the following options: - Burning gasoline - Burning wood - Electrical energy - a hydraulic system - Driving a boat - Burning tires - Time and energy - hydrogen and oxygen

Ans:Burning gasoline

Ques: Water causes refraction of light, and refraction is the bending which is caused by changing speed. Given these facts, what aspect of light changes when it enters water among the following options: - Energy. - speed - kinetic - seasons - reacts - energy - heat - mostly
Ans:
speed