The law of conservation of mass states that the mass will stay constant given a chemical reaction because no atoms were created or destroyed. This being said, an example can include water evaporating in a clear bottle outside on a hot day ( the mass of the bottle will stay the same, but the liquid water evaporated into gaseous water).
B Prokaryotic organisms are always unicellular,but eukaryotic organisms are always multi
Answer: S waves
Explanation:
After an earthquake, secondary waves arrive second at a seismometer. Secondary waves, or S waves, are seismic waves that are known as body waves.
Answer:
C. Release of Heat Energy
Reason:
-A <u>chemical</u> is any substance that has a definite composition
-A <u>chemical reaction</u> is the process by which one or more substances change to produce one or more <u>different</u> substances
-Matter is anything that has mass and volume
-Solids have fixed volume and shape
-Liquids have fixed volume, but not a fixed shape
-Gasses have neither fixed volume or shape
Evidences of Chemical Change:
1. Evolution of bubbles (gas) without a heat source
2. Formation of a precipitation (solids floating in a liquid)
3. Transfer of energy (it gets hot or cold)
4. Color change
In the part of the question, "They noticed that bubbles form, the test tube got hot, and the magnesium disappeared", it states nowhere about color change or change in odor.