Question 6 of 10 Which of the following produces a physical change?
A. Leaving metal outside in the rain until rust forms on its surface
B. Turning wood into ash
C. Melting butter in a microwave
D. Combining carbon dioxide and water to make sugar
SUBMIT

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

Which characteristic of water it form droplets? a. low specific heat b. nonpolar structure c. high surface tension d. ability to dissolve substances

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?