This table shows experiments done by five scientists.
Scientist
Kyle
Katie
Grace
Experiment
cut a bar of gold in half
burned paper into ash
reacted acid and limestone together, forming
carbon dioxide
melted solid aluminum, forming liquid
aluminum
added oxygen to metal, forming rust
Isaac
Caleb
Which scientist(s) have completed a chemical change? Check all that apply.
Kyle
Katie
Grace
Isaac
Caleb

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

We can be sure that a mole of table sugar and a mole of vitamin c are equal in their 1) mass in daltons. 2) mass in grams. 3) number of molecules. 4) number of atoms. 5) volume.