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?
Answer
150 g
225 g
375 g
600 g
Question 2
Question
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)?
The foot pushes forward on the sidewalk; the sidewalk does not push forward on the foot.
The foot pushes forward on the sidewalk; the sidewalk pushes forward on the foot.
The foot pushes backward on the sidewalk; the sidewalk pushes forward on the foot.
The foot pushes backward on the sidewalk; the sidewalk pushes backward on the foot.
Question 3
Question
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?
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?
Answer
Electrons in Substance A are able to move more easily than electrons in Substance B.
There is more energy stored in chemical bonds in Substance A than there is in Substance B.
The atomic nuclei in Substance A have more mass than the atomic nuclei in Substance B.
Substance A contains a higher percentage of radioactive atoms than Substance B.
Question 5
Question
Based on the following information, which of these is the correct element represented? (Yellow = Electron, Blue = Neutron, and Red = Proton.)
What is the mathematical relationship between protons and electrons in a negatively charged atom?
Answer
Protons equal the electrons.
There are more electrons than protons.
There are more protons than electrons.
Question 7
Question
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?
Violet has a higher frequency and longer wavelength than red.
Violet has a higher frequency and a shorter wavelength than red.
Violet has a lower frequency and longer wavelength than red.
Violet has a lower frequency and a shorter wavelength than red
Question 8
Question
In an isotope, what changes?
Answer
the number of neutrons
the number of protons
the number of electrons
Question 9
Question
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?
Answer
The skier loses kinetic energy as they are lifted up the slope aand lose potential energy as they ski down the slope.
The skier gains potantial energy as they are lifted up the slope and maintains the same potential energy as they ski down the slope.
The skier gains potantial energy as they are lifted up the slope and loses potential energy as they ski down the slope.
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.
Question 10
Question
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?