The interaction between two waves that meet is called
a. reflection.
b. refraction.
c. diffraction.
d. interference.

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic