UCPO Chapters 11 & 12 (4) Question Preview (ID: 14980)


New York State Grade 8 Physics Curriculum Review. TEACHERS: click here for quick copy question ID numbers.

If you cannot remove a metal cap from a glass jar, it might be helpful to place the cap under hot water. Which of the following supports this advice?
a) Heating causes metal to expand faster than glass.
b) Heating causes metal to contract faster than glass.
c) Heating causes metla to expand slower than glass.
d) Heating does not cause metals or glass to change.

Complete the statement: Cooling is to contracting, as heating is to
a) expanding
b) vibrating
c) shortening
d) boiling

The change in phase from gas to liquid is called
a) condensation
b) evaporation
c) precipitation
d) transpiration

Water releases energy when it changes phase from
a) liquid to solid
b) solid to liquid
c) liquid to gas
d) solid to gas

On a clear summer night the ground cools off by
a) radiation
b) conduction
c) convection
d) refraction

On Earth the movement of air by winds and currents is due to
a) convection
b) conduction
c) radiation
d) refraction

Light from Polaris, the North Star, tarvels to Earth by
a) radiation
b) conduction
c) convection
d) refraction

Which action would help an air-conditioner use less energy on a hot, summer day?
a) adding extra insulation in the walls and ceiling
b) opening the curtains and blinds
c) opening the windows
d) turning on the lights and stove.

Conduction is
a) heat transfer from molecule to molecule through a solid.
b) heat transfer through a fluid due to differences in density.
c) heat transfer through empty space due to differences in density.
d) heat transfer through empty space due to the vibration of molecules.

Convection is
a) heat transfer through gases and liquids due to differences in density.
b) heat transfer through solids due to differences in density.
c) heat transfer through a liquid only due to differences in density.
d) heat transfer through gases only due to differences in density.

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