What do these two changes have in common? photosynthesis
making jam
Select all that apply.
Both are only physical changes.
Both are chemical changes.
Both are caused by heating,
Both are caused by cooling.

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

What is an example of a physical property?

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?