Physical Science
Which of the following is a unit of acceleration? A. km/s B. m/s/s C. m/s D. N/s/s
B. m/s/s
Which statement best describes a dominant gene? a. It is the gene that produces mutations. b. It is the gene that produces desirable traits. c. It is the gene that masks a recessive gene. d. It is the gene that is masked by a recessive gene
c. It is the gene that masks a recessive gene.
When moist air rises, A. it evaporates. B. it cools. C. it warms. D. it produces solar energy.
B. it cools.
An object is lifted into the air and dropped. Which statement best describe the object's energy as it falls through the air from the stationary position at height X? a. the energy is potential, which changes to kinetic as the object falls. b. the energy is kinetic, which changes to potential as the object falls. c. the energy is potential and kinetic, and the object loses potential energy as it falls. d. the energy is potential and kinetic, and the object loses kinetic energy as it falls.
a. the energy is potential, which changes to kinetic as the object falls.
Which of the following is not involved in the nitrogen cycle? A. volcanoes B. bacteria C. legumes D. plants
A. volcanoes
Why do different parts of Earth's surface recieve different amounts of energy from the sun? A. Earth's surface is curved. B. Earth rotates. C. Not all solar energy is absorbed. D. Ocean currents carry energy away.
A. Earth's surface is curved.
Which question about the Allegheny River can best be answered through scientific inquiry? a. How many species of fish are present in this river? b. Will this river be a fun place to visit? c. Will fishing be a popular sport on this river in five years? d. How much money should be spent to manage this river?
a. How many species of fishes are present in this river?
Two unknown metallic-looking minerals appear gray in color. They are of equal size, yet one is heavier than the other. One unknow mineral is hematite and the other is galena. According to the characteristics listed in the table, which explanation is correct for mineral samples of equal size? A. Galen is the heavier mineral because it is less dense than Hematite and weighs more. B. Galena is the heavier mineral because it is more dense than hematite and weighs more. C. Hematite is the heavier mineral because it is less dense than galena and weighs more. D. Hematite is the heavier mineral because it is more dense than galena and weighs more.
B. Galena is the heavier mineral because it is more dense than hematite and weighs more.
The diagram is a partial punnett square for the attached earlobes trait. What can be concluded about the genotype of each parent? A. One is heterozygous;the other is homozygous recessive. B. Both parents are homozygous dominant. C. One is homozygous dominant; the other is heterozygous. D. Both parents are homozygous recessive.
A. One is heterozygous;the other is homozygous recessive.
Which of the following describes a scientific theory? A. Once established, can never be changed. B. It is a good guess made by very smart people. C. It explains a broad range of observed facts. D. It is an explanation proven beyond all doubt.
C. It explains a broad range of observed facts.
Which of the following is a property of fluorine (F), a nonmetal? A. It is a good conductor of electricity and heat. B. It is a gas at room temperature and pressure. C. It can be drawn into wires. D. It is shiny.
B. It is a gas at room temperature and pressure.
Which of the following is an example of an abiotic factor affecting a biotic factor? A. Bacteria decompose leaf litter in a stream, releasing carbon dioxide. B. Volcanic eruptions spew ash and dust into the atmosphere. C. Run off carries nitrogen compounds into a lake, causing algae to grow. D. Aquatic grasses provide energy and nutrients to a muskrat.
C. Run of carries nitrogen compounds into a lake, causing algae to grow.
Geologists classify rocks as igneous, sedimentary, or metamorphic. On what do geologists base this sysem of classification? A. the method of formation of rocks. B. the location of rocks relative to the Earth's surface. C. the orientation of rocks relative to each other. D. the density of rocks.
A. the method of formation of rocks.
A student hypothesizes that robins prefer large birdhouses to small ones. He built four birdhouses of different sizes to test his hypothesis. What was the independent variable in the student's study? A. the size of the birdhouse. B. the number of birds in a house. C. the location of the birdhouse. D. the season of the year.
A. the size of the birdhouse.
Balance the following equation: NaClO3 --> NaCl + 02
2NaClO3 --> 2NaCl + 3 02
Which of the following correctly matches the cell component with its function in the cells of multicellular organisms? A. cytoplasm- fluid that hold cell components. B. mitochondria-control center for al cell activity. C. nucleus-releases energy to power cell activity. D. vacuole-helps to produce cell proteins.
A. cytoplasm- fluid that hold cell components.
Which of the following is the primary cause of the Earth's weather systems? A. heat energy from the lower atmosphere sinking to the Earth's surface. B. the condensation of water vapor in the Earth's atmosphere C. the uneven heating of the Earth's surface by the sun D. the flow of warm and cold oceanic currents around the Earth's continents
C. the uneven heating of the Earth's surface by the sun
A student wants to find out whether the baseballs used in his league fly farther than the ones used the year before. He noticed many more home runs have been hit this year than last year, so he thinks the new balls have more bounce. State the students hypothesis?
The baseballs this year have more bounce than the ones used last year. Bonus: 300 pts. Identify the independent variable, the dependent variable and one variable that must be held constant.