Why is earth's crust rigid? give details.
u sooo much if you answer!

(also, i put this under biology because i don't know what it goes under)

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b. a light particle