From your research, record three ideas about the natural world that have been rejected through scientific study. These ideas do not have to be limited to topics in physical science. They could relate to ideas in chemistry, biology, physics, astronomy, and so on.

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

There are main groups in the modern periodic table of elements

Select all that apply. a beta particle: is electromagnetic energy is an electron has zero charge is emitted from the nucleus has a +2 charge has a -1 charge