Multiple Choice
Which is a scientific observation?
A) Freezing and boiling are called physical changes
B) Water freezes at zero degrees C
C) If a substance has a density of 1.00g/mL it must be water.
D) When a substance freezes its molecules lose potential energy.
Correct Answer:
Verified
Correct Answer:
Verified
Q46: A tentative explanation of certain facts that
Q47: Explain how the study of chemistry can
Q48: Which is a mixture?<br>A)copper wire<br>B)sugar<br>C)water<br>D)mud
Q49: A key feature of the scientific method
Q50: Which of the following diagrams represents an
Q51: Elements and compounds are the two types
Q53: Chemistry is the science that deals with
Q54: Which of the following diagrams represents a
Q55: Which is a solution?<br>A)air<br>B)liquid water<br>C)solid iron<br>D)soil
Q56: Which has a definite volume but no