How does a scientific explanation differ from a nonscientific explanation? scientific explanations based on assumptions not able to be changed popular testable

What statement is true about all chemical changes? a) chemical changes can be undone. b) chemical changes cannot be reversed. c) chemical changes change the color of objects. eliminate d) chemical changes do not form new products.

Motorcyclists may have to suddenly change direction when encountering a. potholes and reflective markers b. yellow lights c. pavement seams and railroad crossings d. strong winds

Without stratospheric ozone, which of the following would most likely occur? i. smog over major cities would be greatly reduced. ii. farms would produce surplus crops because of increased photosynthesis. iii. uv radiation would damage phytoplankton and reduce populations of aquatic consumers. i only ii only iii only i and ii i and iii