the north Carolina land mass formed about 1.7 billion years ago and has been in constant change ever since continents broke apart merged and then drifted apart again as land movement occurred to form the Appalachian mountains.

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.