Name: _______________________________
Date: _______________________
Chemistry Physics NJASK Practice Test
1.
The data table displays the mass and volume of three different objects.
Object A
Object B
Object C
Mass
12 g
6g
5g
Volume
6 cm3
3 cm3
5 cm3
Using the formula: Density = Mass/Volume
Which of the following statements is correct?
A. Object B is more dense than object A.
B. Objects A and B have equal densities
C. Object C is more dense than Object A.
D. Objects B and C have equal densities.
2. Atoms are composed of protons, neutrons and electrons. What is the electric charge of the
neutron?
A. Positive
B. Negative
C. Neutral
D. Double-charged
3. A battery is placed in a flashlight. The battery is attached to wires that connect to the lightbulb.
Which of the answers below shows the correct order of the energy changes?
A. Chemical  Electricity  Light
B. Chemical  Mechanical  Light
C. Light  Electrical  Chemical
D. Nuclear  Mechanical  Light
4.
Which of the following is a chemical reaction?
A. A nail rusting
B. Water freezing
C. Sugar dissolving in water
D. Glass shattering
5.
The height of a wave from its undisturbed position is its:
A. Trough
B. Amplitude
C. Wavelength
D. Frequency
6.
Using the diagram of the electromagnetic spectrum, which form of electromagnetic radiation
has the shortest wavelength?
A.
B.
C.
D.
Radio waves
Visible light
Gamma rays
Ultraviolet light
7.
Which of the following materials is transparent?
A. Dictionary
B. Wax paper
C. Frosted Glass
D. Clear glass
8.
Which of the following objects uses the force of gravity to make it move?
A. A surfer riding a wave
B. A bus traveling through an intersection
C. A skateboarder skating along a street
D. A skier going downhill
9.
Because it can be transported easily through wires and converted into other forms of energy,
which energy form is most commonly used in our homes?
A. Chemical
B. Nuclear
C. Electrical
D. Mechanical
10. A hot air balloon rises when the air within is heated. What form of heat transfer is used by the
hot air balloon?
A. Conduction
B. Convection
C. Radiation
D. Refraction
11. Which of the following molecules does NOT contain two atoms?
A. O2
B. NaCl
C. N2
D. H2O
12. In medieval times, alchemists tried to transform common substances into gold. Why did they
fail?
A. They did not have pure materials with which to experiment.
B. They did not have the laboratory equipment to heat the substances to high
temperature.
C. Elements cannot be made or changed to other elements by ordinary physical or
chemical means.
D. They did not mix the correct substances to create gold.
13. A student measured the mass and volume of a cube made of the metal silver. What physical
property of silver can be determined using these measurements?
A. Conductivity
B. Density
C. Ductility
D. Boiling point
14. When a liquid freezes, its molecules:
A. Release heat energy and move farther apart
B. Release heat energy and move closer together
C. Absorb heat energy and move farther apart
D. Absorb heat energy and move closer together
15. Which of the following is an example of potential energy being converted to kinetic energy?
A. A roller coaster speeding down a tall hill
B. A compressed spring
C. A stretched rubber band
D. A diver standing on a diving board
16. The gravitational force between the Earth and an object depends on the object’s mass and:
A. The object’s distance from Earth
B. The object’s volume
C. The object’s state of matter
D. The object’s shape
17. Which of the following can be separated by using a magnet?
A. Rust on a nail
B. A mixture of sand and gravel
C. A compound of sodium and chlorine
D. A mixture of sand and iron filings
18. Which of the following materials is made of only one type of atom?
A. Air
B. Water
C. Oxygen
D. Paper
19. Which of the following gases is a compound?
A. Carbon Dioxide (CO2)
B. Oxygen (O2)
C. Ozone (O3)
D. Helium (He)
20. When light strikes some objects, the light bounces off of it. These light rays are:
A. Radiated
B. Refracted
C. Transmitted
D. Scattered
21. Atoms are
electrons?
A.
B.
C.
D.
composed of protons, neutrons and electrons. What is the electric charge of the
Positive
Negative
Neutral
Double-charged
22. When sunlight shines on Jack’s shirt, the shirt appears yellow. Why does the shirt look yellow?
A. The sunlight is yellow and makes all objects appear yellow.
B. The shirt absorbs white light and changes it to yellow.
C. It scatters the yellow part of the light spectrum and absorbs the other light.
D. It absorbs the yellow light from the Sun and scatters all of the other colors.
23. Soup mix is made of a variety of ingredients. The figure shows some of the ingredients. Which
term best describes soup mix?
Nutrition Facts
Ingredients: dehydrated onions, garlic, dehydrated celery,
Carrots, salt, spices
A. Element
B. Atoms
C. Compound
D. Mixture
24. A team of students examine an object. Which of the following is NOT an observation about the
object?
A. It is smooth and shiny.
B. It has a mass of 552 grams.
C. It is 21 centimeters long
D. I think it is metal and used in a machine.
25. A nucleus of most atoms consist of:
A. Neutrons and electrons
B. Protons and neutrons
C. Protons and electrons
D. Electrons
26. The distance between one crest on a wave and the next crest of the wave is called a:
A. Trough
B. Amplitude
C. Wavelength
D. Frequency
27. In the atom below, what is the arrow indicating?
A.
B.
C.
D.
Proton
Electron
Neutron
Nucleus
28. A ball is dropped from the roof of a building. As the ball falls its potential energy is converted
to:
A. Solar energy
B. Nuclear energy
C. Kinetic energy
D. Chemical energy
29. Which of the following is an example of a wave?
A. A string vibrating on a guitar
B. A ball being dropped
C. A bird flying in the atmosphere
D. A car traveling down a highway
30. Which materials would be most useful if you wanted to separate a mixture of sand and sugar?
A. Ruler and balance
B. Filter paper and water
C. Magnet and beaker
D. Graduated cylinder and battery
31. Which form of electromagnetic radiation causes skin damage?
A. Visible light
B. Ultraviolet light
C. Infrared
D. Radio waves
32. Which of the following materials is opaque?
A. Frosted glass
B. Wax paper
C. A wood door
D. Clear glass
33. Which is an example of a chemical reaction?
A. The freezing of water
B. The burning of wood
C. The tearing of a piece of paper
D. The shattering of glass
34. A burning candle demonstrates energy being transformed:
A. From chemical energy to nuclear energy
B. From heat energy to mechanical energy
C. From light energy to nuclear energy
D. From chemical energy to heat and light energy
35. Which of these pictures illustrates how light is reflected off a mirror?
A.
C.
B.
D.
36. The gravitational force between the Earth and an object depends on the object’s mass and:
A. The object’s distance from Earth
B. The object’s volume
C. The object’s state of matter
D. The object’s shape
37. Air is made of a mixture of gases. Which gas is found in the greatest abundance in our
atmosphere?
A. Nitrogen
B. Oxygen
C. Carbon Dioxide
D. Hydrogen
38. Objects resist any change in their motion due to their:
A. Inertia
B. Position
C. Gravity
D. Chemical composition
39. Food, gasoline and batteries store what kind of energy?
A. Mechanical energy
B. Electrical energy
C. Nuclear energy
D. Chemical energy
40. Which of the following is not a mixture?
A. Air
B. Milk
C. Pancake Mix
D. Salt
41. If two equal forces act on an object from opposite directions, the forces are said to be:
A. Gravitational
B. Universal
C. Balanced
D. Unbalanced
Respond fully to the open-ended question that follows. Show your work and clearly explain your
answer. You may use words, tables, diagrams, or drawings.
42. Explain in detail how you would separate a mixture of sugar water, gravel, iron filings, and small
wood particles. What properties of the substances are you willing to separate the mixture?
What supplies would you need and what steps would you take?
43. We are dependent upon electricity to power our many appliances. Select a source of energy
(Hint: any fossil fuel or alternative source of energy), and explain the equipment needed and
the energy transformations that must take place to convert the energy into electricity.