Well-adjusted barometer can help you predict changing weather day to day because it detects minute changes in the air pressure.
Answer:
To understand the physical change and chemical change, one needs to know what is physical properties and what is the chemical properties of a substance.
Physical property is characteristic or trait of a substance that can be observed without converting the substance to a new substance. If there is any type of change in these physical properties like changing the appearance or form of matter and does not make a new substance, takes place it is called physical change.
A chemical change is a change in the matter of a substance that creates one or more new substances. This type of change includes the formation, color, of a precipitate, change in texture, and many other changes.
Carbon dioxide (CO²) is taken in to start the Calvin Cycle.
Answer:
The skin helps in the cooling of the body,when there is exess temperature in the body,the skin reduce it and changes it in the form of sweat and also skin acts as a passage of the sweats.
Answer
D
Explanation
The conservation of mass principle says that whatever you do to a chemical, the mass of the reactants must equal the mass of the products.
There is a loss somewhere that has not been accounted for.The ribbon and oxygen add up to 6.95 which means that the reactants (oxygen and Magnesium ribbon) added up to more than the mass of the product.
The product was only 6.53 grams. Why that is so is another matter and how they measured the oxygen is still yet something else.
A is wrong. The mass of Mg was measured, it was not calculated.
B is wrong. The experiment really depends on moles not raw mass (which is measured and then converted to mass.)
C is wrong. They are not equal. The products are a little less than the mass of the reactants added together. They do not differ by much, but they do differ.
