770576
Questão 1
Questão
W reacts with X in the equation below. \[W+X → Y+Z\]According to the law of conservation of mass, how many grams of W must react completely with 225 grams of X to result in 375 grams as the product?
Responda
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150 g
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225 g
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375 g
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600 g
Questão 2
Questão
Which statement accurately describes the interaction between the foot and sidewalk as a person moves forward along the sidewalk in the direction of the arrow (forward)?
Image:
Capture.PNG (image/PNG)
Responda
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The foot pushes forward on the sidewalk; the sidewalk does not push forward on the foot.
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The foot pushes forward on the sidewalk; the sidewalk pushes forward on the foot.
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The foot pushes backward on the sidewalk; the sidewalk pushes forward on the foot.
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The foot pushes backward on the sidewalk; the sidewalk pushes backward on the foot.
Questão 3
Questão
In the diagram, the top wave is wave X and the bottom wave is wave Y. These waves are similar types of waves with the same amplitude travel in the same medium. Compared to wave X, which statement is correct?
Image:
Capture1.PNG (image/PNG)
Responda
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Wave Y has less speed.
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Wave Y has less less energy.
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Wave Y has lower frequency.
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Wave Y has a shorter wavelength.
Questão 4
Questão
A student is testing the conductivity of two solid substances. Substance A has a high conductivity and Substance B has a low conductivity. Based on this information, what must be true regarding these two substances?
Responda
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Electrons in Substance A are able to move more easily than electrons in Substance B.
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There is more energy stored in chemical bonds in Substance A than there is in Substance B.
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The atomic nuclei in Substance A have more mass than the atomic nuclei in Substance B.
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Substance A contains a higher percentage of radioactive atoms than Substance B.
Questão 5
Questão
Based on the following information, which of these is the correct element represented? (Yellow = Electron, Blue = Neutron, and Red = Proton.)
Image:
Capture.PNG (image/PNG)
Responda
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Image:carbon.PNG (image/PNG)
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Image:lithium.PNG (image/PNG)
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Image:uranium.PNG (image/PNG)
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Image:sodium.PNG (image/PNG)
Questão 6
Questão
What is the mathematical relationship between protons and electrons in a negatively charged atom?
Responda
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Protons equal the electrons.
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There are more electrons than protons.
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There are more protons than electrons.
Questão 7
Questão
Refer to the diagram to the left. Which statement is a correct comparison of the red color to the violet color in the visible light portion of the electromagnetic spectrum?
Image:
spectrum (image/jpg)
Responda
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Violet has a higher frequency and longer wavelength than red.
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Violet has a higher frequency and a shorter wavelength than red.
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Violet has a lower frequency and longer wavelength than red.
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Violet has a lower frequency and a shorter wavelength than red
Questão 8
Questão
In an isotope, what changes?
Responda
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the number of neutrons
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the number of protons
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the number of electrons
Questão 9
Questão
In a ski lift, someone is taken up a ski hill on a chair attached to a wire, than skis down the hill. Which statement best describes the energy change taking place?
Responda
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The skier loses kinetic energy as they are lifted up the slope aand lose potential energy as they ski down the slope.
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The skier gains potantial energy as they are lifted up the slope and maintains the same potential energy as they ski down the slope.
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The skier gains potantial energy as they are lifted up the slope and loses potential energy as they ski down the slope.
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The skier gains potantial energy as they are lifted up the slope and gain both potential and kinetic energy as they ski down the slope.
Questão 10
Questão
Two graduated cylinders are filled with the same amount of water; then a metal rod is dropped in one and a ring in the other. Using the picture, what conclusion can you make about this experiment?
Image:
man (image/jpg)
Responda
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The volume can't be determined.
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The mass can't be determined.
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The volume of the metal is less than the volume of the ring.
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The volume of the ring is less than the volume of the metal.
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The mass of the metal is less than the mass of the ring.
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The mass of the ring is less than the mass of the metal.
Questão 11
Questão
What causes a comet to glow?
Responda
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sunlight being refected
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friction
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gravity
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bending of light as it passes the atmosphere
Questão 12
Questão
What causes a meteor to glow?
Responda
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sunlight being reflected
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friction
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gravity
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bending of light as it passes the atmosphere
Questão 13
Questão
Looking at the picture, which of the following choices shows the correct states of matter for each letter?
Image:
xyz.PNG (image/PNG)
Responda
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X = solid, Y = liquid, Z = gas
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X = solid, Y = gas, Z = liquid
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X = liquid, Z = gas, Y = solid
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X = liquid, Z = solid, Y = gas
Questão 14
Responda
- True
- False
Questão 15
Responda
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Leg A
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Leg B
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Leg C
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Leg D
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Leg E
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