Answer: Chemical changes are different from physical changes because chemical changes have a chemical reaction.
Explanation: A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Often, physical changes can be undone, if energy is input. It's on google.
I think water is indeed an inexhaustible resource. We can keep using it, but it will always come back as rain, snow, ice etc. Water energy sources are one of the biggest renewable energy sources in the world.
Answer:
<em>Proteus</em>
Explanation:
Proteus is a gram-negative bacteria belonging to the family <em>Enterobacteriaceae</em>. The Enterobacteriaceae family are gram negative rod, facultatively aerobic, nonsporulating and oxidase negative. They ferment glucose.
The oxidase test is used to differentiate between member of the family and <em>Pseudomonas </em>(<em>Pseudomonas </em>is oxidase positive).
<em>Proteus </em>is known for its ability to swarm a culture medium due to its high motility (called swarming motility). <em>Proteus </em>is also urease positive, it produces the enzyme urease, which catalyses the breakdown of urea.
a molecule is made up of atoms or ions
some molecules found in the human body are H20 or CO2 or O2