Soured milk smells badly because bacteria have formed new substances in the milk. This is an example of ____.
chemical reaction
Sand flowing in an hour glass is an example of ________.
physical process
The change of state from a gas to a liquid is an example of _______.
physical process
The melting of butter when is left out in a warm room is an example of _______.
physical process
Which of the following is an example of PHYSICAL PROCESS?
C. putting the milk back in the fridge
B. closing the door
D. turning off the electric light
A. cracking an egg
Which of the following describes a CHEMICAL REACTION?
A. match burning
B. water freezing
D. window opening
C. dew on grass
An ice cream cone melting on a hot day is an example of _____.
physical process
Charcoal burning on the grill is an example of ______.
chemical reaction
Is wood burning a physical process or chemical reaction?
chemical reaction
Is making orange juice a physical process or chemical reaction?
chemical reaction
Is sharpening a pencil a physical process and chemical reaction?
physical process
