What must happen for a solar eclipse to occur?
a) the moon must be full.
b) the moon must pass behind earth.
c) the moon’s orbit must cross the plane of the ecliptic.
d) the moon’s orbit must not cross earth’s penumbra.

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

What maintain homeostasis when a persons internal body temperature is 97.5°f

What are the student's observations and inferences before he starts his investigation?