Under ideal conditions, a human can detect a candle flame 30 miles away on a clear night. T F

Explain how earth is like a giant bar magnet. how is our magnetic field made?

The different forms of a gene for a given trait are called .

Which of the following ideas did greek philosopher democritus contribute to the atomic theory? a. each object is made up of one atom, which varies in size from very small to very large. b. matter is composed of only one kind of particle, which can be easily destroyed. c. every element has a specific type of atom, which remains the same size in all forms of matter. d. all matter is composed of small particles, which combine to make larger objects.