Biology
Chemistry
Astronomy
Scientific Theory
Wild Category
100

Viruses are not considered alive. Which property of viruses distinguishes them from living things?

A. They lack cell walls


B. They do not have DNA


C. They are not composed of cells


D. They do not make more viruses

C. What is they are not composed of cells?

100
Natural gas found inside Earth's surface is used for energy to heat homes and power vehicles. It is considered a nonrenewable resource. Wind is considered a renewable resource. Why is this?


A. We can never run out of natural gas, but wind will someday stop

B. We can never run out of moving wind, but we can run out of natural gas

C. Burning natural gas creates pollution, while wind power creates no pollution

D. When we run out of natural gas, we can look for more of it deep in the ground

B. What is we can never run out of moving wind, but we can run out of natural gas?
100
Which of the following units would be most useful in describing the distance between the Milky Way galaxy and the Andromeda galaxy?


A. Angstroms

B. Space years

C. Meters

D. Light years

D. What is light years?
100
Which of the following is the correct order of the scientific method?


A. form a hypothesis, form a question, make an observation, conduct an experiment, analyze data, draw a conclusion

B. make an observation, form a question, conduct an experiment, form a hypothesis, analyze data, draw a conclusion

C. conduct an experiment, form a question, form a hypothesis, analyze data, make an observation, draw a conclusion

D. make an observation, form a question, form a hypothesis, conduct an experiment, analyze the data, draw a conclusion

D. What is make an observation, form a question, form a hypothesis, conduct an experiment, analyze the data, draw a conclusion?

100
Crystal eats a healthy meal before running a marathon. What energy conversion does her body use to help her run?


A. Kinetic to thermal

B. Chemical to thermal

C. Chemical to mechanical 

D. Mechanical to chemical

C. What is chemical to mechanical?
200

Which process contributes the most to the fertility of the soil in an ecosystem? 

A. Human beings add fertilizers to ecosystems


B. Plants use nutrients in soil and the energy in sunlight to make food


C. Consumers eat plants and other animals and leave waste products in the soil


D. Decomposers use dead organisms for energy and return nutrients in their bodies to the soil 

D. What is decomposers use dead organisms for energy and return nutrients in their bodies to the soil?

200
Which of the following pair of elements are most similar in their chemical properties?


A. B and Be

B. Ca and Na

C. Ne and Kr

D. Si and Se

C. What is Ne and Kr?
200

Which of the following is an accurate statement regarding galaxies?


A. Many stars are found inside a galaxy


B. Our solar system is not part of a galaxy


C. There is only one galaxy in the universe


D. Each galaxy has one star, with planets, asteroids and comets in orbit around it

A. What is many stars are found inside a galaxy?

200

Jade wants to do an experiment for her school's science fair. She must first come up with a hypothesis. What must she do to come up with a good hypothesis to test?

A. Control various factors

B. Repeat her experiment several times

C. Find out more about her chosen topic

D. Analyze the results of her experiment

C. What is find out more about her chosen topic?

200
During a family trip, Fernando observes a quarter on the dashboard of the car. When his mother makes a right-hand turn, the quarter moves to the left. When his mother slows to a stop, the quarter moves toward the windshield. The movement of the quarter is a result of which phenomenon?


A. Electromagnetism 

B. Energy conversion

C. Gravitational force

D. Inertia

D. What is inertia?
300
Mammals need to take in food and use it for energy. The mammalian digestive system breaks down this food and absorbs it into bloodstream. But first, mammals must determine if a potential food source is nutritious or likely to be harmful. Which of the following cell types is primarily involved in doing this? 


A. Intestinal cells 

B. Muscle cells

C. Immune system cells

D. Taste bud cells

D. What is taste bud cells?
300
Imagine you have ice cubes and a spoon that are being heated in different ways. The ice cubes are being heated by radiation. The spoon is being heated by conduction. Which statement best describes the difference between these two methods of heat transfer?


A. Radiation only heats up water, and conduction only heats up metal

B. Radiation takes much longer to transfer heat energy than conduction

C. Radiation is produced only by sunlight, while conduction can come from any substance

D. Radiation allows heat to travel through space, but conduction requires an object to be in contact with the heat source

D. What is radiation allows heat to travel through space, but conduction requires an object to be in contact with the heat source?

300
How would Earth most likely be different if there were no moon orbiting it?


A. Earth would not have seasons

B. Earth would not have high and low tides

C. Earth would take longer to rotate on its axis

D. Earth would not have periods of night or day

B. What is Earth would not have high or low tides?
300
A group of scientists believes that smoking may increase the risk of coming down with the common cold. The best way to test this would be to randomly assign people to either smoke or not smoke and to measure the number of days they are sick. Why would this not be an ethical experiment? 


A. The common cold is not an important disease to study

B. People in the study would smoke, even if told not to do so

C. People would have to smoke outdoors, and the cold would make them sick

D. Because smoking is harmful, it would have a negative effect on the people assigned to smoke

D. What is because smoking is harmful, it would have a negative effect on the people assigned to smoke? 
300
The human body takes in oxygen from the air and releases carbon dioxide into the air. The oxygen is carried to all cells of the body, allowing them to extract energy from food. What two organs systems are primarily involved involved in carrying out these function?


A. Digestive and nervous

B. Excretory and endocrine

C. Muscular and skeletal

D. Respiratory and circulatory

D. What is respiratory and circulatory?
400
As a wound on the body heals, cells grow and divide to make new, healthy cells to replace the damaged portions of the tissues. Which process enables a multicellular organism to produce these needed cells?


A. Meiosis

B. Mitosis

C. Reproduction 

D. Respiration

B. What is Mitosis?
400
The St. Lucie nuclear power plant produces electrical energy by using uranium as fuel. The fission, or splitting of the nuclei of uranium atoms, produces large amounts of heat. This heat energy is used to generate electricity for surrounding cities. The Sun produces energy through nuclear fusion - the joining of nuclei. The hydrogen atoms in the Sun fuse to create helium, a process that gives off tremendous amounts of energy. 


A. They both involve splitting atoms

B. They are both physical, not chemical, changes

C. They will both produce energy for millions of years to come

D. They both involve change in the atomic number of substance

D. What is they both involve change in the atomic number of substance?
400

Which of the following does the Sun have in common with all other main-sequence stars?



A. It is part of the Milky Way


B. It is composed mainly of hydrogen


C. It is a medium-sized yellow dwarf star


D. It supplies the energy required for life on Earth



B. What is it is composed mainly of hydrogen?

400
Which of the following statements does not describe the relationship between science and technology?


A. Better observation

B. Technology helps scientists observe the world better

C. Science and technology can be applied in many different situations 

D. What scientists can learn about the world is not limited by technology

D. what is.. what scientists can learn about the world is not limited by technology?

400
In German Shepherd dogs, the trait for drooping ears is dominant. A male German Shepherd with drooping ears and a female German Shepherd with drooping ears produce a female offspring with erect ears. Which most likely describes the genes of the German Shepherd parents?


A. One of the parents must have two recessive alleles for erect ears

B. The male German Shepherd carries the recessive allele for erect ears

C. Both of the parents must carry the recessive allele for erect ears

D. The female German Shepherd carries the recessive allele for erect ears

C. What is both of the parents must carry the recessive allele for erect ears?
500

Some plants have small bumps called nodules on their roots that provide a home for nitrogen-fixing bacteria. These bacteria take in nitrogen gas (N2) from the air and convert it to chemical compounds that the plants can use as nutrients. How does the relationship between the plants and the bacteria transfer nitrogen through Earth?

A. It moves nitrogen from the atmosphere to the biosphere

B. It moves nitrogen from the biosphere to the atmosphere

C. It moves nitrogen from the atmosphere to the lithosphere

D. It moves nitrogen from the hydrosphere to the atmosphere

A. What is it moves nitrogen from the atmosphere to the biosphere?
500
Isotopes are atoms of the same element that have a different number of neutrons. For example, a carbon (C) atoms can have 6, 7, or 8 neutrons. C-14 isotopes of carbon have 8 neutrons, while C-12 carbon isotopes only have 6 neutrons. How will a sample of carbon made up of C-14 isotopes differ from a sample made up of the same number of C-12 carbon isotopes?


A. The C-14 sample will be less dense

B. The C-14 sample will be positively charged

C. The C-14 sample will be negatively charged 

D. The C- 14 sample will have more mass and weigh more

D. What is the C- 14 sample will have more mass and weigh more?

500

What we know as Halley's comet was spotted without a telescope in 1531 and 1607 by separate observers. It was seen by Edmund Halley again in 1682. Halley predicted that the comet could be seen again from Earth in later years, including 1910 and 1986. What allowed him to make this prediction?



A. The comet had no recognizable pattern


B. He had better telescoped to view the comet


C. He recognized the observations of the comet occurred in the cycle


D. He used computer technology to track the comet's movements in space



C. What is he recognized the observations of the comet occurred in the cycle?

500
A solid substance in tube A was mixed with a liquid. Fizzing bubbles were produced, and the solid now has a different color and density. A solid substance in tube B was heated. It remained the same color, but changed to a liquid and became less dense. Were these changes physical or chemical changes?


A. They both underwent physical changes

B. They both underwent chemical changes

C. Substance A underwent a chemical change; substance B underwent a physical change

D. Substance A underwent a physical change; substance B underwent a chemical change 

C. What is substance A underwent a chemical change; substance B underwent a physical change?
500
A protist such as Euglena can take oxygen and dissolved molecules into its cells through its cell membrane. It then uses these substances for energy. The cells of a multicellular organism such as a human being have the same basic needs as the Euglena. However, most cells in the body are located between many other cells and do not have direct contact with the environment. Which features of multicellular organisms allow them to solve this problem?


A. Organ systems and skin

B. Photosynthesis and cellular respiration 

C. A way to move around the environment and thick tissue layers

D. Specialized cell functions and a system of transport that reaches all cells

D. What is specialized cell functions and a system of transport that reaches all cells?
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