8.1.5 Phase Change Utah Question Preview (ID: 44690)


Utah Seed Standards. TEACHERS: click here for quick copy question ID numbers.

If a substance is heated up what will the molecules be doing?
a) Energy is being removed, so the molecules are slowing down
b) Energy is being removed, so the molecules are speeding up
c) Energy is being added, so the molecules are slowing down
d) Energy is being added so the molecules are speeding up

Which is the least dense phase?
a) Solid
b) Liquid
c) Gas
d)

Which is a solid?
a) molecules are moving slowly and relatively close together.
b) molecules are far apart and moving slowly
c) molecules are far apart and moving quickly
d) molecules are not moving

What happens when you remove heat energy?
a) Moleluces move slower
b) Molecules move faster
c) Nothing
d)

If a substance has a density of 1.8 g/cm3, what will happen when placed in water?
a) Float
b) Sink
c) nothing
d)

What is the density of this substance? Mass: 20 g ; Volume: 2ml
a) 5 g/ml
b) 10 g/ml
c) 25 g/ml
d) 250 g/ml

What happens to the temperature during a phase change?
a) Stays the same
b) Goes up
c) Goes down
d)

As the Tempeture increases, the density
a) increases
b) decreases
c) stays the same
d)

What is the density? Mass: 10g Volume: 5ml
a) 5 g/ml
b) 50 g/ml
c) 2 g/ml
d) 1 g/ml

What happens to the density if the volume of a substance decrease?
a) The density will also increase
b) The density will decrease
c) The density will stay the same
d) The density will increase but the mass will decrease

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