The four items shown above were served at a dinner at Kim’s house. Each of the items is a mixture. Kim turned on a flashlight and pointed it at each of the four items. Which of the items did the light pass through without changing? SALAD DRESSING
APPLE JUICE
GELATIN
WHIPPED CREAM

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What metric units would you use to measure the thickness of a key

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false