There are fewer than one billion stars in a typical galaxy.
true or false?

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false