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1. 
When the hotter molecules rise up and the colder molecules move down is called:
A.
Conduction
B.
Convection
C.
Radiation
2. 
The colder molecules move faster than the hotter ones.
A.
True
B.
False
3. 
The amount of thermal energy that an object has is called:
A.
Heat
B.
Temperature
C.
Light
D.
thermal energy
4. 
Thermal energy affects objects in different ways. It makes them:
A.
melting and evaporation
B.
conduction, radiation and convention
C.
expand, move and change the state
5. 
when 2 objects are in contact, thermal energy passes from the hotter object to the colder object. This is the definition of:
A.
insulator
B.
radiation
C.
convection
D.
conduction
6. 
When a solid changes into a liquid is called:
A.
melting
B.
evaporation
C.
expansion
7. 
A chemical chage:
A.
can be reversed
B.
can't be reversed
C.
sometimes can be reversed and sometimes not
8. 
The basic laws of light are:
A.
opaque, transparent and traslucent
B.
refraction and reflexion
C.
reflection and refraction
9. 
White light is...
A.
all the colours combined together
B.
not a color
C.
all the colors except black
10. 
White colour can be divided
A.
by reflexion
B.
by reflection
C.
by refraction