Which of the following is a physical change? a.) sawing a piece of wood. b.) burning a piece of wood. c.) rust forming on an iron fence. d.) a copper roof changing color from green to red.

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

Why is the use of carbon-14 limited