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Physical Science
Biology
Earth Space Science
The nature of Science
Miscellaneous
100

The smallest part of an element (like pure gold, aluminum, etc.) that still has the properties of the bigger chunk of element is a(n)  

A. proton

B. molecule

C. cell

D. atom

D. atom

100
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.
100
When moist air rises, A. it evaporates. B. it cools. C. it warms. D. it produces solar energy.
B. it cools.
100
Describe one way microscopes are used to help doctores determine whether people are healthy.
Answers may vary. The doctor can look for small things like bacteria and viruses.
100
Which energy source can be described as having the greatest impact on Earth's living environments? a. moving air b. moving water c. the Sun d. geothermal
c. the Sun
200

An object is held in the air without moving,  and then dropped. Which statement best describe the object's energy as it falls ?

 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.

200
Which of the following is not involved in the nitrogen cycle? A. volcanoes B. bacteria C. legumes D. plants
A. volcanoes
200
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.
200
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?
200
Which type of moving water provides the best environment for organisms that decompose dead organic matter? a. a steep moutain stream the flows when snow melts in the spring. b. a shallow river with cold, clear water and a sandy bottom. c. a slow-moving river with a wide, open channel. d. a rapidly moving stream with a narrown, steep channel.
c. a slow-moving river with a wide, open channel.
300

Two unknown cubes are of the same volume (size) but the 1st one has more mass in it and feels heavier.  Which is true about their densities?


A. they have the same density.

B. the 1st cube must have more atoms packed in it and is denser.

C. The 2nd cube must have more atoms packed in it and is denser

D. We can not determine the density of the cubes.

B. the 1st cube must have more atoms packed in it and is denser

300

Choose the correct answer that shows biological structures organized from simplest to most complex.

A. cells, tissues, organs, systems

B. systems, organs, tissues, cells

C. cells, tissues, systems, organs

D. they are all of the same complexity.

. A. cells, tissues, organs, systems

300
When the north end of Earth's axis points toward the sun, what season is it in the northern half of Earth? A. summer B. fall C. spring D. winter
A. summer
300
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.
300
Which two organ systems let you raise your arm in class? A. nervous and digestive B. endocrine and excretory C. muscular and skeletal D. ciculatory and respiratory
C. muscular and skeletal
400

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.

400
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.
400
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.
400
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.
400
Which of the following natural processes can be represented as an open system? A. the movement of nitrogen between plants and animals. B. the transfer of carbon through the Earth system C. the movement of energy through a prairie ecosystem. D. the relationship between cell respiration and photosynthesis.
C. the movement of energy through a prairie ecosystem.
500

In the equation for when a soft metal (Sodium, Na) bonds with a poisonous gas (Chlorine, Cl) and results in a new substance called salt (sodium chloride, NaCL., which of the following is true?

Na   +   Cl  ----->   NaCl

A.  This shows a physical change where the end product has the same properties as the starting substance.

B. This shows a chemical change where the end product has different properties from the starting substances.

C. This chemical equation is not balanced, showing the same number of atoms on both sides of the arrow.

D. The reactant is the salt, NaCl.


B. This shows a chemical change where the end product has different properties from the starting substances.

500
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.
500
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
500
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.
500
Today's farmers apply three times as much chemical pesticide to their fields as they did in 1970, but the total percentage of crops lost to pests has remained constant. Identify one reason why this has happened?
Answers may vary.