Well research shows that it's not technically a chemical change. you need to find out whether you are looking for silica or to use glass changes on a molecular level when heated or if it's melted into another form (physical change). It appears that to make glass you simply melt silica into the resulting product, which is glass. there is not a chemical change or molecular change. Therefore, <u>making glass<em /></u> from sand is a <u>physical</u>, not a chemical change.
Answer:
iron and carbon:steel:copper and tin: metal
Answer:
20 atoms
Explanation:
There are 4 in H2O2 because of 2 hydrogens and 2 oxygens.
Then, multiply by 5 because the coefficient is 5, therefore there are 5 H2O2 molecules.
5 x 4 = 20
Beta particles will bend toward the South Pole of the magnet.
Hope this helped!
The appropriate answer is c. Scientists get the information from past climates by melting ice cores retrieved from boring the ice and retrieving cores. The air is trapped in the ice as little bubbles and as the ice melts the gases are retrieved. Ice cores are taken from regions such as the Greenland ice sheets. Scientists have tested air samples thousands of years old.