Name:



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 |6 g |5 g |

|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?

[pic]

A. Radio waves

B. Visible light

C. Gamma rays

D. 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 composed of protons, neutrons and electrons. What is the electric charge of the electrons?

A. Positive

B. Negative

C. Neutral

D. 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?

[pic]

A. Proton

B. Electron

C. Neutron

D. 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.

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download