plz, help I don't know this question: Explain the difference between a caravan, a pilgrimage, and an oasis.

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.