Oregon trail would be the best answer
Answer:
B
Explanation:
A chemical change occurred, and this caused the liquid’s physical properties to change.
when we read her experiment we can see that color changed to blue, it is because new products are formed. And the temperature cause this.
Answer:
Evaporate minerals are more soluble than calcite and quartz.
Explanation:
Evaporate minerals are the water soluble minerals which at higher concentration precipitate out and crystallized forming rocks.
example of chemicals present are:
chlorides and sulphates.
Quartz is silica (very less soluble, or insoluble)
Calcite is calcium carbonate, again an insoluble salt.
Thus
Evaporate minerals are more soluble than calcite and quartz.
Answer:
The present age of the Sun is 4.6 billion years old. It will live for about 5.4 billion years more. Initially, the Sun was majorly composed of Hydrogen. Current composition of the Sun is 70% hydrogen, 28% Helium and 2% heavier elements. Thus, the composition has changed since birth due to nuclear fusion process in the core.
