There are certain types of Goldfish that can live in those conditions but they along with the Beta will be suffering and not happy. Changing the water often is not a good thing for fish. They like it best when the water chemistry is stable. If you must keep a fish in a tank less than 20 gallons, I would replace 5-10 percent of the water with distilled water everyday. This will dilute the waste products that are in solution. When you have no filter, the fish are essentially living in a septic tank.
betas are carnivores.try blood worms.
PermanentTemporaryGoodBad
Changes that are genetic
Changes that are genetic
Changes that are genetic
Bears
Since the Earth's temperature changes, the study of that will be part of Earth Science. But there are lots and lots of other things about the earth, besides temperature, that is part of Earth Science. Also, other things besides the Earth change temperature ,so many other kinds of science, besides Earth Science, study the effects of temperature .
The kinds of changes in substances that are always physical changes are changes in the state. This is the change from solid, to liquid and then to gas and the reverse.
Carbon
Water cycle
Physical
FIlter, heater, tank