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SCIENCE ONE
SCIENCE TWO
SCIENCE THREE
100
In a class discussion, a teacher explained that when some objects are rubbed together, they become electrically charged. The teacher then rubbed a balloon with wool, and when she touched the balloon to a wall, it stuck to the wall. Which best explains why the balloon stuck to the wall? 1. Static electricity in the balloon was attracted to electrical currents in the wall? 2. the balloon became charged and was attracted to the opposite charge it induced in the wall? 3. As the balloon approached the wall, the moving charge induced a magnetic field in the wall? 4. The balloon was attracted to the wall because the balloon and the wall both carried the same charge?
What is the balloon became charged and was attracted to the opposite charge it induced in the wall.
100
The Hertzsprung-Russel diagram shown below represents characteristics of groups of stars. Sirius B is a star with a very high temperature and very low luminosity. What type of star is Sirius B? 1. giant? 2. supergiant? 3. white dwarf? 4. main sequence?
What is white dwarf.
100
Some elements have two electrons in their outermost energy level. Which describes the most likely location of these elements in the periodic table? 1. second column from the left? 2. second row from the top row? 3. second column from the right? 4. second row from the bottom row?
What is second column from the left.
200
Which is true for most main sequence stars? 1. They will become black holes? 2. They convert carbon to oxygen? 3. They have shorter life cycles than other star types? 4. They use fusion of hydrogen atoms to produce energy?
What is they use fusion of hydrogen atoms to produce energy.
200
How much force must be applied to a stationary 10-kilogram object to accelerate it at a rate of 2 meters/second on a frictionless surface? 1. 5 newtons? 2. 8 newtons? 3. 12 newtons? 4. 20 newtons?
What is 20 newtons.
200
Which element will most likely act as a cation in an ionic bond? 1. argon? 2. oxygen? 3. calcium? 4. bromine?
What is calcium.
300
Which best describes the cause of the movement of Earth's tectonic plates? 1. magnetic energy stored in Earth's core? 2. solar energy entering Earth's atmosphere? 3. Gravitational energy located at Earth's surface? 4. heat energy transferred through Earth's mantle?
What is Heat energy transferred through Earth's mantle.
300
Liquid hydrogen peroxide (H2O2) decomposes to produce water (H2O) and oxygen gas (O2), as shown by the chemical equation below. 2H2O2 (l) --> 2H2O (l) + O2 (g) What is the ratio of (H2O2) to (O2) in this reaction? 1. 2 liters H2O2 to 1 liter O2? 2. 2 grams H2O2 to 1 gram O2? 3. 2 molecules H2O2 to 1 molecule O2? 2 cubic centimeters H2O2 to 1 cubic centimeter O2?
What is 2 molecules H2O2 to 1 molecule O2.
300
An object is lifted to the top of a bookcase. Which instrument would be best to use to measure the force required to lift the object? 1. a stopwatch? 2. meter stick? 3. a spring scale? 4. a pressure gauge?
What is a spring scale.
400
Which is the major cause of the winter season in the United States? 1. Earth's distance from the sun is at its greatest? 2. Earth's atmosphere is blocking more solar energy? 3. Earth's prevailing winds blow from a northerly direction? 4. Earth's axis tilts the norther hemisphere away from the sun?
What is Earth's axis tilts the norther hemisphere away from the sun?
400
Scientist use the electron cloud model to describe atomic structure. According to this model, which feature of an atom is described be probabilities? 1. charge of electrons? 2. mass of an electron? 3. number of electrons? 4. location of an electron?
What is location of an electron.
400
Microscopes represent a technological advance made possible by the application of scientific knowledge. Which field of scientific study provided important knowledge needed to develop the first microscope? 1. optics? 2. genetics? 3. astronomy? 4. microbiology?
What is optics.
500
What is the amount of work done if a 7-newton force is exerted over a 5-meter distance? 1. 5 newton-meters? 2. 7 newton-meters? 3. 12 newton-meters? 4. 35 newton-meters?
What is 35 newton-meters.
500
What type of energy is stored in chemical bonds? 1. kinetic? 2. nuclear? 3. Potential? 4. gravitational?
What is Potential.
500
If an incoming ray is striking a concave mirror, which description best describes the reflected ray? 1. pointing straight down? 2. Pointing in a downward angled direction? 3. pointing straight out? 4. Pointing in an upward angled direction?
What is Pointing in a downward angled direction.