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An example of beta decay is the emission of an electron by a carbon-14 what?
A. ion
B. molecules
C. protons
D. nucleus
Answer: | D |
Which theory describes the distribution of electrons in molecules in much the same way that the distribution of electrons in atoms is described using atomic orbitals?
A. atomic orbital theory
B. molecular orbital theory
C. atomic distribution theory
D. molecular distribution theory
Answer: | B |
Oversecretion of insulin can cause what?
A. inflammation
B. hyperglycemia
C. hypoxia
D. hypoglycemia
Answer: | D |
The first few species to colonize a disturbed area are called what?
A. pioneer species
B. producer species
C. original species
D. colonization species
Answer: | A |
What are the two loops of blood flow in the cardiovascular system?
A. pulmonary and systemic
B. aerobic and anaerobic
C. systolic and diastolic
D. anabolic and metabolic
Answer: | A |
What is the name of a group of hereditary diseases that affect the body's ability to control blood clotting?
A. hypertension
B. arithmya
C. anemia
D. hemophilia
Answer: | D |
Protists which use their tails to eat are called what?
A. cycle - feeders
B. filter-feeders
C. swimmers
D. flagellators
Answer: | B |
What term is used to describe foods containing active cultures of beneficial bacteria?
A. antibiotics
B. probiotic
C. sembiotic
D. carotenoids
Answer: | B |
What helps control the muscles and maintain balance?
A. muscular system
B. circulatory system
C. nervous system
D. lymphatic system
Answer: | C |
What unit of power is equal to 1 joule of energy per second?
A. volt
B. watt
C. hertz
D. byte
Answer: | B |
What is just below the cerebrum and coordinates body movements?
A. cerebellum
B. spinal cord
C. bloodstream
D. hypothalamus
Answer: | A |
What part of blood releases clotting factors?
A. erythrocytes
B. platelets
C. white blood cells
D. hemoglobin
Answer: | B |
Adding carbon to iron makes what type of metal?
A. plastic
B. steel
C. ions
D. titanium
Answer: | B |
Which structure includes sugar-phosphate "backbones", composed of alternating phosphate groups and deoxyribose sugars, and nitrogenous bases?
A. dna triple helix
B. molecule double helix
C. mulecular triplex
D. dna double helix
Answer: | D |
In a hydrogen replacement reaction, the hydrogen in the acid is replaced by what?
A. oxygen
B. gas
C. water
D. an active metal
Answer: | D |
Mitosis and meiosis are both forms of division of the nucleus in these?
A. endogenous cells
B. converts cells
C. eukaryotic cells
D. reproduction cells
Answer: | C |
What is the last step in a scientific investigation?
A. documenting findings
B. retesting findings
C. communicating findings
D. verifying findings
Answer: | C |
Where is multiple fission more often observed?
A. among protists
B. among vertebrates
C. among animals
D. among multi-celled organisms
Answer: | A |
What type of invertebrates where the earliest animals?
A. arachnids
B. cnidaria
C. annelids
D. aquatic invertebrates
Answer: | D |
Unlike wood and glass, steel is an example of a material that responds to what force?
A. electromagnetic
B. kinetic
C. thermal
D. magnetic
Answer: | D |
Carefully controlling the speed of a fission reaction produces what kind of energy?
A. atomic
B. nuclear
C. chemical
D. thermal
Answer: | B |
When two electric contacts come together it completes a what?
A. charge
B. atom
C. cricuit
D. breaker
Answer: | C |
Pure nonpolar covalent bonds exist only between what?
A. two altered atoms
B. three altered atoms
C. two identical atoms
D. two producing atoms
Answer: | C |
The decay rate is measured in a unit called the what?
A. half-life
B. radioactive decay
C. exponential decay
D. decay rate
Answer: | A |
What is a condition in which a material called plaque builds up inside arteries?
A. scoliosis
B. arthritis
C. fibrosis
D. atherosclerosis
Answer: | D |
Quarks in the middle energy family are found in cosmic rays and are produced in what?
A. particle splicers
B. cosmic accelerators
C. particle accelerators
D. particle processors
Answer: | C |
What celestial body in the solar system makes up most of its total mass?
A. sun
B. Andromeda
C. Jupiter
D. earth
Answer: | A |
Free ear lobes, widow's peak and a dimpled chin are examples of what kind of traits in humans?
A. mendelian
B. genetic disorders
C. adaptations
D. spontaneous mutations
Answer: | A |
Producing light without heat is called what?
A. osmosis
B. thermoluminescence
C. bioluminescence
D. luminescence
Answer: | D |
What natural part of the water cycle can cause damage and death?
A. floods
B. evaporation
C. clouds
D. expiration
Answer: | A |
How many large eggs are generated during oogenesis?
A. one
B. 2
C. 4
D. 3
Answer: | A |
Gaseous nitrogen is converted into forms that can be used by plants during a process called what?
A. dioxide fixation
B. plant fixation
C. oxygen fixation
D. nitrogen fixation
Answer: | D |
What is an example of a disease that affects the blood?
A. scoliosis
B. tuberculosis
C. rickets
D. anemia
Answer: | D |
Name the term used to described prokaryotes that require oxygen.
A. hydrophylic
B. anaerobic
C. mouth breathers
D. aerobic
Answer: | D |
Many ionic compounds with relatively large cations and a 1:1 cation:anion ratio have this structure, which is called the what?
A. analogous structure
B. hydrocarbon structure
C. cesium chloride structure
D. boron chloride structure
Answer: | C |
What property increases as an object's mass increases, making a full box harder to push than an empty one?
A. inertia
B. weight
C. magnetism
D. gravity
Answer: | A |
What will happen to sea levels due to increased global temperatures?
A. rise
B. reverse
C. surge
D. Drop
Answer: | A |
Sea-lilies, sea cucumbers and sea stars fall into what class of organism?
A. snakes
B. mollusks
C. crabs
D. echinoderms
Answer: | D |
What kind of rock forms when material such as gravel, sand, silt or clay is compacted and cemented together?
A. ingenious
B. limestone
C. craters
D. sedimentary
Answer: | D |
In science, we need to make observations on various phenomena to form and test what?
A. variations
B. assumptions
C. hypotheses
D. theories
Answer: | C |
What do industries use water to generate?
A. pollution
B. refrigeration
C. light
D. electricity
Answer: | D |
Mammals are synapsids, meaning they have a single opening in what structure?
A. spine
B. hip
C. heart
D. skull
Answer: | D |
What are the properties of solutions called that depend only on the concentration of dissolved particles and not on their identity?
A. platyhelminth properties
B. platyhelminth properties
C. colligative properties
D. platyhelminth properties
Answer: | C |
Liquids that mix with each other in all proportions are said to be miscible, maning they have infinite mutual what?
A. viscosity
B. salinity
C. insolubility
D. solubility
Answer: | D |
Which law relates the pressure, volume, and temperature of a gas?
A. newton's law
B. shifts gas law
C. directions gas law
D. combines gas law
Answer: | D |
Heat and light are forms of what, which refers to the ability to do work?
A. waves
B. food
C. fuel
D. energy
Answer: | D |
Volcano chains form as an oceanic plate moves over what?
A. melt spot
B. hot spot
C. dust spot
D. Water spot
Answer: | B |
What type of planet is jupiter?
A. a red dwarf
B. a phantom
C. a gas giant
D. a noble gas
Answer: | C |
What does antifreeze do to the freezing temperature of the water in car radiators?
A. keeps it constant
B. raises it
C. lowers it
D. foresees it
Answer: | C |
What process typically occurs to metal exposed to outside elements?
A. corrosion
B. shrinkage
C. extraction
D. explosion
Answer: | A |
The innermost layer of the sun is known as what?
A. photosphere
B. core
C. convective zone
D. surface
Answer: | B |
Motor neurons and sensory neurons are part of what nervous system?
A. central
B. peripheral
C. sensory-somatic
D. autonomic
Answer: | C |
What type of science is the study of matter and energy and includes chemistry and physics?
A. Earth science
B. biology
C. genetics
D. physical science
Answer: | D |
When plants lose their leaves in the fall, what chemical is produced less to cause the change?
A. carbonate
B. oxygen
C. pheromes
D. chlorophyll
Answer: | D |
In which kind of animals does parthenogenesis occur?
A. invertebrates
B. mammals
C. tissues
D. species
Answer: | A |
What is the name of the temporary organ that begins to form from the trophoblast layer of cells shortly after implantation?
A. uterus
B. embryo
C. placenta
D. appendix
Answer: | C |
What term is used to describe anything that takes up space and has mass?
A. size
B. matter
C. weight
D. opacity
Answer: | B |
What is the organ that senses sound?
A. nose
B. eye
C. skin
D. ear
Answer: | D |
What can be described in terms of size, density, and distribution?
A. habitats
B. biomes
C. dimensions
D. populations
Answer: | D |
What is the term for the simplest form of matter that has a unique set of properties?
A. a neutron
B. an atom
C. an electron
D. an element
Answer: | D |
What causes light to refract?
A. blinking
B. slowing down
C. speeding up
D. bending
Answer: | B |
Capacitors can be used to filter out low frequencies. for example, a capacitor in series with a sound reproduction system rids it of the 60 hz what?
A. hum
B. echo
C. white noise
D. vibration
Answer: | A |
What is made up of nerve cells that sense stimuli and transmit signals?
A. blood tissue
B. muscle tissues
C. dependent tissue
D. nervous tissue
Answer: | D |
Some animals prepare for the long winter by going into what?
A. suspended animation
B. hibernation
C. pollination
D. fermentation
Answer: | B |
It may seem as though burning destroys matter, but the same amount of what, still exists after a campfire as before?
A. mass
B. energy
C. termperature
D. concentrations
Answer: | A |
Different isotopes of an element have different mass numbers because they have different numbers of what?
A. nuclei
B. neutrons
C. electrons
D. protons
Answer: | B |
Density is defined as the mass of an object divided by its what?
A. liquid
B. volume
C. size
D. growth
Answer: | B |
What element is responsible for one-half of the osmotic pressure gradient that exists between the interior of cells and their surrounding environment?
A. calcium
B. nitrogen
C. sodium
D. potassium
Answer: | C |
What types of orbits do comets usually have?
A. elliptical
B. convex
C. vertical
D. spectral
Answer: | A |
What describes how close an estimate is to a known standard?
A. frequency
B. accuracy
C. diversity
D. precision
Answer: | B |
Canoe paddles, nutcracker, and hammer are examples of what type of simple machine?
A. pivot
B. handle
C. lock
D. lever
Answer: | D |
What do most species of monkeys have that no apes or humans do?
A. large brain
B. five fingers
C. fur
D. tail
Answer: | D |
What are joints in which the bones are connected by a band of connective tissue?
A. plane
B. saddle
C. syndesmoses
D. cartilaginous
Answer: | C |
What are the four stages of food processing?
A. ingestion, digestion, elimination and extinction
B. ingestion, reproduction, absorption, and elimination
C. ingestion, digestion, absorption, and reproduction
D. ingestion, digestion, absorption, and elimination
Answer: | D |
What are different forms of the same gene?
A. alleles
B. genomes
C. nuerons
D. peptides
Answer: | A |
What is the wheeled robot developed by nasa to explore the surface of mars?
A. mars driver
B. mars robot
C. mars SUV
D. mars rover
Answer: | D |
What effect does taking anabolic steroids have on testosterone production?
A. reduces it
B. does nothing
C. increases it
D. eliminates it
Answer: | A |
Living in a large colony requires good communication. ants communicate with chemicals called what?
A. peptides
B. pheromones
C. hormones
D. alkalides
Answer: | B |
What complex carbohydrates are the polymers of glucose?
A. starches
B. sugars
C. fruits
D. fats
Answer: | A |
What is the term for the shallow space above the zygomatic arch in a skull?
A. temporal fossa
B. distinct fossa
C. angular fossa
D. Medium Fossa
Answer: | A |
What is the inner layer of skin called?
A. connective layer
B. the epidermis
C. the dermis
D. hypodermis
Answer: | C |
Many european and asiatic elms are less susceptible to dutch elm disease than which elms?
A. american
B. rican
C. african
D. caribbean
Answer: | A |
What does a thermometer measure?
A. oxygen
B. size
C. temperature
D. precipitation
Answer: | C |
What are plant-like protists called?
A. spores
B. sponge
C. algae
D. fungi
Answer: | C |
What is a series of processes that remove unwanted substances from water called?
A. water treatment
B. water filtration
C. water dilution
D. water cleaning
Answer: | A |
Original atoms are called what type of isotopes?
A. offspring
B. parent
C. component
D. product
Answer: | B |
What do you call an area covered with water, or possessing very soggy soil, all or part of the year?
A. island
B. wetland
C. stream
D. peninsula
Answer: | B |
In which continent are meerkats most likely to be found?
A. South America
B. africa
C. North America
D. Australia
Answer: | B |
What is the name of the thin layer that acts as a boundary between the stratosphere and the mesosphere?
A. spirogyra
B. spicule
C. ozone layer
D. stratopause
Answer: | D |
What is the process of removing wastes and excess water from the body?
A. ingestion
B. excretion
C. diffusion
D. depletion
Answer: | B |
Which measure shows how individuals in a population are distributed, or spread throughout their area?
A. population distribution
B. geographical distribution
C. population phase
D. proportional distribution
Answer: | A |
What is a simple carbohydrate with the chemical formula c 6 h 12 o 6 better known as?
A. fructose
B. glucose
C. glutamate
D. alcohol
Answer: | B |
Groups of related organs form what?
A. organ systems
B. community systems
C. maturation systems
D. artificial systems
Answer: | A |
Each lymph organ has a different job in what system?
A. immune
B. circulatory
C. nervous
D. respiratory
Answer: | A |
The number of protons in an atom is called what?
A. isotope
B. atomic number
C. mass number
D. metallic number
Answer: | B |
Crevasses are found in glaciers. how do these come about?
A. man made
B. god
C. from movement
D. rigidity
Answer: | C |
Combining nonpolar olive oil and polar vinegar yields what type of mixture?
A. homogeneous
B. amorphous
C. heterogeneous
D. omnigeneous
Answer: | C |
If no conclusion is reached after an experiment, the scientist may retest what?
A. materials
B. hypothesis
C. suggestions
D. conclusion
Answer: | B |
What builds up in an artery and reduces blood flow?
A. calcium deposits
B. plaque
C. surface tension
D. pressure
Answer: | B |
Compounds with metals and nonmetals sharing electrons are known as what kinds of compounds?
A. ions
B. eons
C. atoms
D. acids
Answer: | A |
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