Which of the following would NOT be an example of a chemical change Yeast produces carbon dioxide gas to make dough rise.

Two white liquids mix together to create a pink solid

Lighting a fire to keep warm.

Sugar is dissolved into tea to make it taste sweeter.

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion