Physical Science written by Mr. Franklin

Transcription

1 Physical Science written by Mr. Franklin 1 In normal air, which of the following substances is most common? (1 point) carbon dioxide nitrogen oxygen carbon monoxide 2 Which of the following is a chemical property of iodine? (1 point) is silver black in color as a solid is violet color as a gas reacts with starch to give a dark blue color is a solid at room temperature 3 A car sits in sunlight all day long. The heat that is now contained in the car was transferred to the car primarily by which of the folllowing processes? (1 point) electric energy transfer conduction convection radiation 4 In order to determine the speed of an object, what measurements must be made? (1 point) distance and direction distance and time distance and mass time, distance, and volume 5 Something that is made up of the same type of atoms or molecules and has a single set of properties is a(n) (1 point) conglomerate pure substance precipitate mixture 6 Materials with more than one set of properties that can be separated by physical means is a(n) (1 point) element mixture pure substance compound 7 The height of a wave crest is called (1 point) 1/11

2 energy wavelength amplitude frequency 8 Along a seashore, ocean and land breezes are produced primarily due to which method of heat energy transfer? (1 point) conduction electrical energy transfer convection radiation 9 Soft drinks consist of a mixture of water, sugar, and flavoring, with carbon dioxide gas bubbled through it. Which of these ingredients would be considered the solvent? (1 point) carbon dioxide gas flavoring water sugar 10 Four people are pulling on a box with the forces shown in the diagram. If there are no other forces on the box, in what direction will it move? (1 point) 2/11

3 directly toward Bill toward the bottom of the diagram directly toward Diane toward the right side of the diagram 11 The number of protons in an neutral atom is equal to the number of (1 point) neutrons electrons ions isotopes 12 The International System of Units SI (Metrics) is a standardized system of measurement used to express fundamental quantities in metric units. Which of the following units are used to measure the fundamental quantities of LENGTH, MASS, and TIME, respectfully, in the SI system? (1 point) second, meter, gram gram, second, meter meter, second, gram meter, gram, second 13 Which action involves a chemical change? (1 point) baking a cake cutting wrapping paper making ice cubes adding sugar to tea 14 The weight of a person on Earth is 6 times his or her weight on the moon. What type of force is responsible for the person's weight? (1 point) gravitational inertial mechanical electromagnetic 15 By what process does a glass lens focus light? (1 point) dispersion 3/11

4 refraction reflection congregation 16 Which of the following could be used to convert light energy into electric energy? (1 point) a windmill a chemical storage battery rotating coils in a magnetic field a solar cell 17 The topside of a sidewalk begins to warm as the sun shines on it. Through what method of heat transfer does the top of the sidewalk increase in temperature? (1 point) electrical energy transfer convection radiation conduction 18 Which of the following are transferred or shared when two atoms react chemically? (1 point) protons photons neutrons electrons 19 A piece of blue paper appears blue because the paper (1 point) absorbs all colors of light except blue refracts all colors of light except blue is transparent to all colors of light except blue reflects all colors of light except blue 20 What force must be applied to the rope in the the pulley shown in the diagram to lift the 10 N block? (1 point) 4/11

5 15 N 10 N 5 N 20 N 21 Which state of matter has a definite volume but a variable shape? (1 point) liquid solid vapor gas 22 A curtain blows in front of an open window. What does this tell you about the property of air? (1 point) air is more dense than the curtain air does not have mass air's density is the same the curtain material air is made of tiny particles of matter 23 Which one of the following would demonstrate that there is empty space between particles of 5/11

6 matter? (1 point) an ice cube melts and turns into as liquid salt can be separated into chlorine and sodium air in a balloon expands and contracts when it is heated and cooled atoms contain protons, neutron, and electrons 24 A sound wave is produced and begins to travel from left to right through four different media (substances). The speed of the wave varies as it travels. The media are; a solid, a liquid, a gas, and a vacuum, but not necessarily in that order. Based on data shown in the table, which speed most likely represents a gas? (1 point) In the absence of air resistance, which of these objects will fall at the fastest rate when dropped? (1 point) They will fall at the same rate the ball with a mass of 25 kg the ball with a mass of 75 kg the ball with a mass of 10 kg 26 For wavelengths moving at a constant speed, if wavelength is doubled, then frequency is (1 point) quadrupled halved 6/11

7 unchanged doubled 27 The stored energy in a battery can best be described as (1 point) thermal nuclear kinetic chemical 28 A boy walking barefoot on a hot sidewalk feels the warmth of the heat on the bottom of his feet. Through which method is the heat transferred from the sidewalk to the boy's feet? (1 point) radiation electrical energy transfer conduction convection 29 The melting of wax is a physical change, yet the burning of wax is a chemical change. What is the primary difference between the physical change and chemical change of wax in a burning candle? (1 point) Melted wax is a different phase of matter than solid wax The burning of wax forms a new compound, while the melting of wax does not A higher temperature is needed to burn wax than to melt wax Melted wax can be separated into other substances, while solid wax cannot 30 How many different types of atoms are found in the element gold? (1 point) Which one of the following is NOT an example of a physical property? (1 point) density 7/11

8 melting point flammability hardness 32 What is a material called that easily carries an electric current? (1 point) diode semiconductor conductor insulator 33 A student connects three identical light bulbs in parallel to a battery as shown in the diagram. What happens when the student removes one of the light bulbs from its socket? (1 point) The other light bulbs remain on, one brighter and the other less bright than before The other light bulbs remain on and will be equally bright the other light bulbs will reamin on, one less bright and the other the same brightness as before All the light bulbs go out 34 Albert stirs a mug of hot chocolate with a metal spoon. What type of heat transfer is responsible for the spoon getting hot? (1 point) radiation conduction 8/11

9 thermoelectric convection 35 What type of energy conversion is involved when a lump of coal is burned? (1 point) potential to thermal thermal to electric magnetic to chemical kinetic to potential 36 Pauline needs to measure the sliding friction of a brick. How should she go about doing this? (1 point) drag the brick by a string attached to a spring scale so that it gradually speeds up hang the brick from a string attached to a spring scale and read the force attach the brick to a string and then to a spring scale and read the force needed to quickly lift the brick off the ground drag the brick by a string attached to a spring scale along the surface of a table at a constant speed and read the force 37 Which one of the following is NOT an example of a pure substance? (1 point) gold lemonade water mercury 38 Which statement about magnets best matches the diagram? (1 point) 9/11

10 the Earth's core produces a magnetic field opposite charges repel one another and like charges attract magnets always repel other magnets like charges repel one another and opposite charges attract 39 Use the table to answer the following question: Juan performed a flame test by burning a small amount of an unkown substance in the flame of a Bunsen burner. The flame turned blue. It is most likely that the unknown substance contained (1 point) calcium sodium potassium copper 40 A rock is placed on a balance scale and its mass is determined to be 235 grams. The rock is then crushed into smaller pieces and the mass is again measured on the scale. The mass of the crushed rock (1 point) 10/11

11 will be less than the mass of the whole rock because it is made up of smaller pieces. is equal to its volume. will be the same as the whole rock. cannot be measured because it no longer has the same volume. Done 11/11