You are presented with the quiz "Carbon cycles quickly between organisms and" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "carbon cycles quickly between organisms and the atmosphere" and "atmosphere is the blanket of air around the earth". So, what's the best answer to the question?
OPTIONS:
- O2
- DNA
- comets
- air
- Aves
- ocean
- satellites
- lung
air
--
You are presented with the quiz "what contracts when fibers get shorter?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "muscle contraction occurs when muscle fibers get shorter" and "muscles in the upper arm called biceps are used to flex the arm". So, what's the best answer to the question?
OPTIONS:
- strength
- strong
- h2o
- bushes
- density
- wheat
- firm hugs
- biceps
biceps
--
You are presented with the quiz "a black hole is formed by a what diameter star" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "ablack hole is formed by a high-mass star collapses" and "bigger mass means smaller star". So, what's the best answer to the question?
OPTIONS:
- heat
- matter
- size
- small
- dead
- nucleus
- burning
- deadly
small
--
You are presented with the quiz "What causes the amount of attraction exerted by an object?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the mass of an object causes the gravitational force exerted by that object" and "gravitation is a universal force of attraction acting between all matter". So, what's the best answer to the question?
OPTIONS:
- mass
- motion
- motors
- heat
- energy
- wind
- fibers
- fields
mass
--