Which best describes proper disposal technique?
a bin should be labeled "chemical wastes and hazardous waste."
a bin should be labeled "chemical wastes and broken glass."
students should know proper disposal of the chemicals they use,
students can dispose of all chemicals in the sink.

Where substance is produced during cellular respiration

Select all the correct answers. for a claim about the natural world to be considered scientific, what attributes must it have? a).it must be applicable to future events and occurrences. b)it must be based on scientific observations that can be repeated in a controlled setting. c)it must be open to modification if new evidence doesn't completely support it. d)it must be consistent with only a small portion of relevant observations or data.

How do light years astronomers to determine the ages of distant objects in space ?