Check all of the indicators that a chemical change has occurred: Group of answer choices

change in shape, but substance is the same

change is state of matter

unexpected color change

expected color change

formation of a precipitate

change in odor

unexpected change in temperature

bubbles form

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Condensation happens when water vapor cools. true or false? ?