Aphase change is an example of a a. nuclear change b. physical change c. chemical change d. covalent change

Which of the following units is not an official si unit? mole liter kilogram ampere

Is 343 in the sequence -5, -2, 1, 4, 7

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.