Stion completion status:

question 1

why are electromagnets used in metal scrap yards?



they are weak permanent magnets.

they are temporary magnets, so eventually the metal just falls off.

they are very powerful permanent magnets.

they are temporary magnets, so they can be turned on and off.

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Which characteristics can be used to differentiate star systems? check all that apply.