A hot air balloon rises in the air and returns to the ground by changing the temperature of the air in the balloon. What is happening inside of the balloon to make this occur?

1. combine iron and copper (ii) sulfate solution. (hint: iron will form the iron (iii) ion) fe + cuso4 → 2. combine lead (ii) nitrate and potassium iodide solutions. pb(no3)2+ kl → 3. combine magnesium metal and hydrochloric acid solution. mg + hcl → 4. electrolysis (splitting) of water. h2o → 5. burning magnesium. mg + o2 →

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

What are fossils of organisms that existed over a wide area but only for a limited time period called?