Answer:reflection by dust particles in air
A good scientific question has certain characteristics. It should have some answers (real answers), should be testable (can be tested by someone through an experiment or measurements), leads to a hypothesis that is falsifiable (means it should generate a hypothesis that can be shown to fail), etc.
#1. A. Waxing crescent.
#2. 1.
#3. C.
#4. C.
Answer:
A switch opens or closes the electrical circuit, turning the flow of electricity on or off.
Explanation:
1) all matter is made of atoms , atoms are indivisible and indestructible 2) compounds are formed by a combination of two or more different kinds of atoms 3) a chemical reaction is an arrangement of atoms