Energy
Which of the following energy transformation is most similar to an electric pencil sharpener?
A) Stopwatch B) Calculator C) Candle D) Fan
D) Fan
A car burns gasoline to create hot air gas that expands to move the pistons in the engine, which causes the car to be able to move. What energy transformations occur from the fuel to the movement of the car?
A) Thermal to mechanical
B) Thermal to chemical to mechanical
C) Chemical to thermal to mechanical
D) Chemical to electrical
C) Chemical to thermal to mechanical
What is friction?
the resistance that one surface or object encounters when moving over another
A company is designing a new cell phone. The need a solid material that conducts electricity and can be made into a thin wire.
What material would best fit their needs?
F. Nonmetal
G. Metalloid
H. Metal
J. Semi-conductor
H. Metal
A. color, taste, shape, and size
B. hardness, color, luster, and streak
C. taste, hardness, color, and size
D. streak, size, taste, and shape
B. hardness, color, luster, and streak
Which of the following energy transformations occurs when a lamp is plugged into an outlet and a blub is inserted into the lamp?
F) Thermal-Electrical-Light
G Electrical-Thermal-Light
H) Light-Thermal-Electrical
J Electrical-Light-Thermal
J Electrical-Light-Thermal
Two airplanes are flying at the same speed. One airplane is flying 50m higher than the other. Which statement best describes the energy of the two airplanes?
F The airplane flying 50m higher has a greater kinetic energy.
G The two plans have the same gravitational potential energy but different kinetic energies.
H The airplane flying low will have more gravitational potential energy than the plane flying high.
J The two airplanes have the same kinetic energy but different gravitational potential energies.
J) The two airplanes have the same kinetic energy but different gravitational potential energies.
How would a graph look that is describing a motion of a car that travels at a constant speed for two minutes, increases its speed over two minutes and then travels at a constant speed for two more minutes.
Check students drawing
Which of the word would fit with the group of words below:
Luster, ductility, and conductivity
A. Chemical composition
B. Malleability
C. Reactivity
D. Oxidation
B. Malleability
Flour, sugar, cocoa, oil, and eggs are mixed together and placed in the over to make brownies. When the brownies are removed from the oven, they no longer look like the original ingredients.
Which of the following describes why the ingredients changes?
F. A biological change occurred.
G. No change occurred.
H. A physical changed occurred.
J. A chemical changed occurred.
J. A chemical changed occurred.
Which examples describes a transformation of thermal energy into chemical energy?
A) You turn on the heater in your car.
B) The UV light from the Sun causes a sunburn.
C) The Sun's energy causes you to sweat.
D) The oven bakes dough into bread.
D) The oven bakes dough into bread.
The energy related to motion of an object is called-
F potential energy
G kinetic energy
H electrical energy
J chemical energy
G) kinetic energy
What type of incline plane will require the most force to push a ball to the top?
F. A plane with a 1m incline
G. A plane with a 2m incline
H. A plane with a 3m incline
J. A plane with a 4m incline
J. A plane with a 4m incline
A student needs to find the density of a cube. Each side of the cube measures 3 cm and the mass of the cube is 12 g.
What is the approximate density of the cubes?
F. 0.4 g/cm(cubed)
G. 2.25 g/cm (cubed)
H. 4.0 g/cm (cubed)
J. 36 g/cm (cubed)
F. 0.4 g/cm(cubed)
How many different elements make up the compound below:
C17H20ON4NaO9P
A. 8
B. 7
C. 6
D. 32
C. 6
When a hawk eats a mouse and then uses the energy from the mouse to fly, the hawk's body convert-
A) mechanical energy to chemical energy
B) thermal energy to mechanical energy
C) chemical energy to mechanical energy
D) mechanical energy to thermal energy
C) chemical energy to mechanical energy
Which of the follow statements is true about the advantages and disadvantages of using different energy resources?
A) Wind power, is an expensive, nonrenewable source of energy for the production of electrical energy.
B) Solar power is a clean, renewable sources of energy, but quite expensive and not dependable on a daily basis.
C) Coal is safe and effective renewable source of energy used in production of electricity.
D) Nuclear power is a cost effective, nonrenewable energy resource that leaves behind no waste.
B) Solar power is a clean, renewable sources of energy, but quite expensive and not dependable on a daily basis.
A student who was training for cross country race jogged for 2.0 hours and covered a distance of 14.0 kilometers. What was the average speed of the student?
F) 28.0 km/hr
G) 7.0 km/hr
H) 12.0 km/hr
J) 0.14 km/hr
G) 7.0 km/hr
What type of metal was used to make a key that has a volume of 5 ml and mass of 39.5?
Aluminum 2.70-A
Steel 7.90 -B
Copper 8.90 -C
Gold 19.30 -D
Steel 7.90 -B
Which of the following lists contains only elements and a reason why they are elements?
F. H20, NaCI, N2, CO2- Substance are elements because they contain more than one chemical symbol.
G. Kr, Ne, Ar, He- Substance are elements because they are all noble gases.
H. C12, H2, Na, He- Substances are elements because they are pure.
J. F2, O3, Li, H- Substances are elements because they all have chemical symbols.
H. C12, H2, Na, He- Substances are elements because they are pure.
Which of the follow best explain a disadvantage of using a nonrenewable resource over a renewable energy resource?
F Coal generated electricity currently cost more per kWh than solar generated electricity.
G Burning coal produces less energy than burning natural gas.
H Geothermal energy is difficult to use to produce electricity compared to burning coal.
J Burning coal will produce more environmental pollution than using wind turbines.
J Burning coal will produce more environmental pollution than using wind turbines.
Several dams on the Colorado River in Texas produce electricity through hydro-power. What is an advantage of this type of energy production?
F) Land is flooded when dams are built.
G Dams improve biodiversity by creating lakes out of rivers.
H) Hydro-power provides renewable energy for human use.
J Electricity can only be generated during daylight hours.
H Hydro-power provides renewable energy for human use.
What is the average speed of to the wind-up toy investigation results below?
Trial 1: Distance= 26.0 Time= 4.0
Trial 2: Distance= 13.0 Time= 2.0
Trial 3: Distance= 19.5 Time= 3.0
A) 11.17 cm/s B) 6.5 cm/s
C) 19.5 cm/s D) 8.20 cm/s
B) 6.5 cm/s
When will a bouncing ball have its greatest kinetic energy and least potential energy?
When the ball is closet to the ground.
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