Review 2nd Nine Weeks Question Preview (ID: 8114)
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Graph C
a) none of these
b) Graph B
c) Graph A
d) Graph C
Together the atmosphere and ocean current systems help to regulate Earths overall temperature. The transfer of heat in currents of air and water is called
a) conduction
b) absorption
c) radiation
d) convection
A toy car rolls 8 meters in 2 seconds. What is the average speed of the toy car?
a) 16 m/s
b) 4 m/s
c) 6 m/s
d) 10 m/s
Which statement would most likely explain why students coasting bicycles down a large hill have a greater final speed that those coasting down a small hill.
a) The large hill had greater mass than the small hill.
b) The large hill was taller than the small hill.
c) The small hill had a bumpier surface than the small hill.
d) There was more friction coasting down the large hill.
Solar cells convert the suns energy into electricity and can be very expensive. Which would be the most likely result if scientists created a cell that everyone could afford?
a) a decrease in electricity use
b) a reduction in air pollution
c) a decrease in stormy weather
d) a reduction in the number of cars
Which of these situations is an example of thermal energy being added to water to change its state of matter?
a) Droplets collecting on the outside of a pan filled with cold water
b) ice crystals forming on a car windshied
c) Puddles of water evaporating during a sunny day.
d) Raindrops falling from the sky
Which of the following examples represents the GREATEST amount of potential energy?
a) a screen door spring fully stretched
b) water spilling over a waterfall
c) yeast growing in a Petri dish
d) a helium balloon rising in the air
Which of the following energy types is considered very effecient but also produces dangerous waste products?
a) solar energy
b) geothermal energy
c) wind energy
d) nuclear energy
A chemical change always results in -
a) a precipitate being formed
b) the formation of a new substance
c) a change in state of matter
d) a change in size
Energy from the sun is required for water to evaporate from the oceans. This energy travels through space by-
a) conduction
b) mechanical
c) convection
d) radiation
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