Carpooling decreases the amount of cars used to travel to a place, and cars and gasoline-burning engines are large sources of emissions. Given these facts, what can help decrease emissions among the following options: - power - exercise - Carpooling - Flying on airplanes - Having children - Eating red meat - green manures - electricity
Carpooling

(Question)
Sunlight and rain can cause a rainbow, and and light broken into many pieces is a rainbow. Given these facts, what can cause light to be broken into many pieces among the following options: - rain and coal - Chemical energy - Physical weathering - heat energy - energy of moving objects - snow and wind - sunlight and rain - ice and leaves
(Answer)
sunlight and rain

Ques: Hair is a fiber that is found only in mammals, and all humans are mammals. Given these facts, what has hair among the following options: - animals - humans - h2o - snakes - fish - goats - fur seals - bears
Ans: humans

(Q).
Most canyons are formed by flowing rivers through erosion over long periods of time, and erosion was monitored by means of erosion pins. Given these facts, how do we track canyon changes among the following options: - LEDs - wind - forces - river - slow - Pins - Raft - three
(A).
Pins

Ques:Disease-causing microbes have a negative impact on the body, and pathogens are microbes that cause disease. Given these facts, what has a negative impact on the body among the following options: - pathogens - electrons - smallpox - amoebae - vitamins - lungs - viruses - smoking

Ans:pathogens

Biofuel is used to produce electricity by burning, and energy is created when objects are burned. Given these facts, what is biofuel used to produce among the following options: - disease - chemicals - waste - bamboo - engines - sleep - energy - food
energy