Directions: Color all of the comic bubbles that are physical changes blue Color all comic bubbles that are chemical changes orange
AN APPLE
MELTING
DISSOLVING SUGAR
ROTTING
BUTTER
IN TEA
BAKING A
CAKE
BREAKING
A STICK
A CAR
RUSTING
Choose one physical change from the
examples above and state at least two pieces
of evidence to support your answer.
Choose one chemical change from the
examples above and state at least two pieces
of evidence to support your answer.
Physical Change dissolving sugar in tea.
Chemical Change
Evidence l:
Evidence l: The sugar isn't morphing into a new
substance so its a physical change
Evidence 2
Evidence 2:

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

може ли да зареждате повече информация, моля

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.