Fact 1: Nuclear reactions in stars causes stars to produce light. Fact 2: Nuclear reactions convert mass to energy. Given the two facts above, answer the question "what causes stars to produce light?" with the following options: - by making heat - Generating heat - converting mass to energy - photosyntehsis - photosynthetic pigments? - Evaporation of water - heat production - hydrogen and oxygen
converting mass to energy

(Question)
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
(Answer)
energy

Ques: Fact 1: Light enters the eye through an opening called the pupil. Fact 2: Light enters the eye through the pupil, and the pupil is made larger or smaller by the iris. Given the two facts above, answer the question "What makes the pupil change sizes?" with the following options: - electrically - sun's heat - sweating - It expands - The iris - nerves - environment - heat
Ans: The iris

(Q).
Fact 1: Muscle contraction occurs when muscle fibers get shorter. Fact 2: Muscles can only contract and relax. Given the two facts above, answer the question "What occurs when muscle fibers get longer?" with the following options: - photosynthesis - rapid expansion - kinetic energy - cramps - relaxation - fertilization - movement - sweating
(A).
relaxation

Ques:Fact 1: Transportation technology is used for moving people. Fact 2: Bus Bus transportation is nearby. Given the two facts above, answer the question "What are used to move people?" with the following options: - bacteria - pencils - cars - tendons - animals - muscles - wind - buses

Ans:buses

Fact 1: Cold fronts cause thunderstorms as they pass by. Fact 2: Thunderstorms and lightning Lightning often accompanies thunderstorms. Given the two facts above, answer the question "What causes lightning?" with the following options: - dust - energy - cold fronts - sunlight - Energy. - scattered light - fire - heat energy
cold fronts