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What is the nervous tissue in the brain and in the rest of the nervous system made up of?
A. electrons
B. ions
C. plastic
D. neurons
Answer: | D |
How do planets usually rotate to their orbital planes?
A. chaotic
B. nearly perpendicular
C. randomly
D. exactly perpendicular
Answer: | B |
What are algae that live in colonies of hundreds of cells called?
A. euglenids
B. volvox
C. chlorophyta
D. rhodophyta
Answer: | B |
Irrigation can waste a lot of what natural resource?
A. water
B. habitat
C. money
D. fertilizer
Answer: | A |
What drives puberty in male humans?
A. estrogen
B. bloodstream
C. testosterone
D. methane
Answer: | C |
What is our largest source of energy?
A. methane
B. wind
C. coal
D. iron
Answer: | C |
Helium-3 is produced by beta decay of a certain what?
A. quark
B. particle
C. electron
D. nuclide
Answer: | D |
What do animals require to grow and develop?
A. food
B. sunlight
C. sucrose
D. carbon dioxide
Answer: | A |
What term is used to describe the process by which organisms give rise to offspring?
A. osmosis
B. photosynthesis
C. variation
D. reproduction
Answer: | D |
What are the nonliving matter that living things need called?
A. acids
B. elements
C. fluids
D. nutrients
Answer: | D |
What term is used to express the measurement of how high land is above sea level?
A. knots
B. distance
C. elevation
D. latitude
Answer: | C |
A pulley is a simple machine that consists of a grooved wheel and?
A. a rope
B. a lever
C. a battery
D. a wedge
Answer: | A |
What is another name for a broad explanation that is supported by a great deal of evidence?
A. hypothesis
B. theory
C. conjecture
D. concept
Answer: | B |
Vinegar is a solution of which acid?
A. crystalline
B. magnesium
C. acetic
D. boric
Answer: | C |
Which system does the large and small intestine belong to?
A. digestive system
B. molecules system
C. skeletal system
D. LYMPHATIC
Answer: | A |
Particles of matter have the most definite shape in what material state?
A. plasma
B. solid
C. gas
D. liquid
Answer: | B |
What body system allows humans to move?
A. muscular system
B. lung system
C. digestive system
D. abnormal system
Answer: | A |
High decibel sounds can damage your?
A. brain
B. nose
C. eyes
D. ears
Answer: | D |
What are the dark areas that appear on the sun called?
A. coronas
B. sunspots
C. coreolis effect
D. anomalies
Answer: | B |
Fusion is another nuclear process that can be used to produce energy. in this process, smaller nuclei are combined to make larger nuclei, with an accompanying release of this?
A. food
B. mineral
C. cells
D. energy
Answer: | D |
One common form of mate choice, called assortative mating, is an individual’s preference to mate with partners who are what?
A. far away from
B. similar to themselves
C. close to themselves
D. different from themselves
Answer: | B |
What powerful microscopes use a beam of subatomic particles instead of a beam of light?
A. scientific microscopes
B. nuclear microscopes
C. electron microscopes
D. complex microscopes
Answer: | C |
Which scientist built the first telescope?
A. einstein
B. darwin
C. newton
D. galileo
Answer: | D |
What type of bacteria change nitrogen gas from the atmosphere to nitrates in soil?
A. hydrophylic bacteria
B. nitrogen fixing bacteria
C. multicellular bacteria
D. spiral bacteria
Answer: | B |
If no unbalanced force acts on an object the object remains at constant velocity or what?
A. rotating
B. constant
C. constant movement
D. at rest
Answer: | D |
What group of organisms was initially misclassified as plants because they also lack the ability to move, grow in soil, and have cell walls?
A. algae
B. fungi
C. protozoa
D. gymnosperm
Answer: | B |
How does the epidermis renew its layer?
A. scabbing
B. shedding dead cells
C. loofah
D. exfoliating scrub
Answer: | B |
What is it called when crystals form from magma?
A. sedimentation
B. vulcanism
C. transpiration
D. crystallization
Answer: | D |
What type of symmetry does an octopus have?
A. bilateral
B. quadrilateral
C. essential
D. internal
Answer: | A |
What is necessary in a person who wishes to play wind instruments?
A. powerful lips
B. strong hands
C. healthy lungs
D. vocal cords
Answer: | C |
What is the scientific term for climates with the least moisture?
A. mediterannean
B. polar
C. arid
D. tropical
Answer: | C |
What's the term for a piece of an organism breaking off and forming a new organism?
A. improvization
B. depletion
C. fragmentation
D. extinction
Answer: | C |
What animal group can be found in every environment on earth, but primarily in the warm and moist tropics?
A. rodent
B. reptiles
C. insect
D. horses
Answer: | C |
Most people can survive only a few days without what essential substance?
A. air
B. carbon
C. water
D. food
Answer: | C |
The vegetal pole refers to the concentration of what toward one pole of an egg?
A. shell
B. yolk
C. light
D. embryo
Answer: | B |
What machines have scientist built to smash particles that are smaller than atoms into each other head-on?
A. Atom Accelerators
B. nitrogen accelerators
C. particle accelerators
D. energy accelerators
Answer: | C |
What type of relationship occurs between organisms when one member benefits without affecting the other?
A. commensalism
B. cooperative
C. parasitic
D. bilateral
Answer: | A |
The type of what dictates how far it can penetrate into matter, such as lead or human flesh?
A. evaporation
B. radiation
C. insulation
D. specific gravity
Answer: | B |
What role do proteins play in a biological reaction?
A. amino acid chains
B. antioxidants
C. reverse hormones
D. act as catalysts
Answer: | D |
If you drive or take the bus to school or work, you are using a vehicle that probably burns gasoline, a material that burns fairly easily and provides energy to power the vehicle. recall that burning is a?
A. energy change
B. temperature change
C. physical change
D. chemical change
Answer: | D |
Muscles are composed mostly of cells called what?
A. muscle fibers
B. muscle organelles
C. muscle polymers
D. muscle filament
Answer: | A |
Conifers are the most prevalent type of what plant group?
A. gymnosperms
B. algae
C. angiosperms
D. theropods
Answer: | A |
What element enters the body when an organism breathes?
A. methane
B. water
C. helium
D. oxygen
Answer: | D |
Bonding in molecules with resonance forms is better described by which theory?
A. Pascal's theory
B. Geiger theory
C. molecular orbital theory
D. string theory
Answer: | C |
In places like the grand canyon, hard rocks that are resistant to weathering form what, while softer rocks that weather more easily form slopes?
A. cliffs
B. crevasses
C. valleys
D. peaks
Answer: | A |
When two skateboarders push against each other what happens?
A. they stick together
B. they magnetize
C. they move apart
D. they rise
Answer: | C |
The three layers of protective coverings of the spinal cord is called what?
A. meninges
B. dermis
C. tendons
D. muscles
Answer: | A |
A measure of how close a series of measurements are to one another is what?
A. calculation
B. reflection
C. precision
D. density
Answer: | C |
Ionic compounds contain cations and anions rather than what?
A. discrete neutral molecules
B. analogous neutral molecules
C. characterized neutral molecules
D. positive molecules
Answer: | A |
Are giraffes herbivores or are they omnivores?
A. herbivores
B. carnivores
C. omnivores
D. neither
Answer: | A |
Respectively, which parts of the circulatory system carry blood from the heart toward capillaries, and return blood to the heart from capillaries?
A. arteries and capillaries
B. arteries and veins
C. parasites and veins
D. organs and veins
Answer: | B |
It was not until the era of the ancient greeks that we have any record of how people tried to explain the chemical changes they observed and used. at that time, natural objects were thought to consist of only four basic elements: earth, air, fire, and this?
A. soul
B. water
C. grass
D. sky
Answer: | B |
In science, what do we call a mathematical relationship that exists between observations under a given set of conditions?
A. idea
B. law
C. fact
D. theory
Answer: | B |
What conducts nerve-like electrical signals that help integrate whole-plant function?
A. the stamen
B. the stem
C. the ploem
D. the spicule
Answer: | C |
Found in many products, such as petri dishes, agar is made from mucilagnious material in this?
A. seawater
B. fungi
C. gelatin
D. seaweed
Answer: | D |
What is the process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane?
A. autolysis
B. endocytosis
C. metastasis
D. ectocytosis
Answer: | B |
What are the layered rocks that form when certain prokaryotes bind thin films of sediment together?
A. stomatolites
B. stalagmites
C. quartzes
D. stalactites
Answer: | A |
Where are the taste buds located in humans?
A. mouth
B. teeth
C. tongue
D. lips
Answer: | C |
What describes the way light reflects off of the surface of the mineral?
A. density
B. hardness
C. intensity
D. luster
Answer: | D |
What tissue consists of cells that form the body’s structure?
A. connective
B. fibrous
C. reproductive
D. congenital
Answer: | A |
What forms at the boundary between two air masses?
A. a cool
B. a rough
C. a front
D. hurricane
Answer: | C |
Nitrogen wastes are produced by the breakdown of what during normal metabolism?
A. hormones
B. enzymes
C. proteins
D. lipids
Answer: | C |
In the humoral response, what protein substances help neutralize or eliminate toxins and pathogens in the blood and lymph?
A. membranes
B. platelets
C. parasites
D. antibodies
Answer: | D |
Most ferns produce the same type of spores and are therefore called what?
A. homosporous
B. sporozoans
C. heterosporous
D. seeds
Answer: | A |
In which way do sunspots occur?
A. in threes
B. in fours
C. in pairs
D. by themselves
Answer: | C |
What is the most important source of electromagnetic waves on earth?
A. cell phones
B. the sun
C. radios
D. wireless networks
Answer: | B |
Conifers are the dominant phylum of gymnosperms, with the most variety of species. most are tall trees that usually bear scale-like or needle-like leaves. the thin shape of the needles and their waxy cuticle limits water loss through this?
A. transportation
B. evaporation
C. sedimentation
D. transpiration
Answer: | D |
Connecting to the brainstem and extending down the body through the spinal column is the spinal cord. the spinal cord is a thick bundle of nerve tissue that carries information about the body to this?
A. stomach
B. brain
C. lungs
D. liver
Answer: | B |
Where do most cubozoans live?
A. arctic oceans
B. rivers
C. tropical oceans
D. lakes
Answer: | C |
What type of treatment is being researched that may cure or prevent genetic disorders?
A. preventive therapy
B. regulatory therapy
C. variation therapy
D. gene therapy
Answer: | D |
What are the names of foul-smelling amines, formed as a part of the decay process after death?
A. sulfur and formaldehyde
B. formaldehyde and cadaverine
C. cadaverine and putrescine
D. methane and sulfur
Answer: | C |
What's it called when the reaction is sped up until equilibrium is established?
A. favoring
B. limiting
C. division
D. pushing
Answer: | A |
What are the smallest particles of water called?
A. hydrogen
B. atoms
C. molecules
D. ions
Answer: | C |
The hormone androgen increases aggressiveness and promotes what type of behaviors?
A. cognitive
B. sexual
C. nervous
D. asexual
Answer: | B |
Which currents distribute heat around the planet and have a large impact on climate?
A. electrical
B. surface
C. wind
D. air
Answer: | B |
What type of gas is a harmless gas that living things add to the atmosphere during respiration?
A. carbon dioxide
B. Hydrogen
C. helium
D. oxygen
Answer: | A |
What is formed when hot lava cools?
A. mineral crystals
B. lava rock
C. hydrogen crystals
D. magma crystals
Answer: | A |
Which radiations helps sterilize medical supplies?
A. beta radiation
B. ions radiation
C. gamma radiation
D. ionizing radiation
Answer: | D |
What type of receptors, also known as intracellular or cytoplasmic receptors, are found in the cytoplasm of the cell and respond to hydrophobic ligand molecules that are able to travel across the plasma membrane?
A. external
B. essential
C. mechanical
D. internal
Answer: | D |
Why is water important for the nervous system?
A. to prevent disease
B. to carry nutrients
C. to prevent dehydration
D. to carry information
Answer: | C |
What term means the tendency of a mineral to break along certain planes?
A. fault
B. cavity
C. fracture
D. cleavage
Answer: | D |
What are the parts used in electronic devices such as computers called?
A. digital components
B. chargers
C. batteries
D. electronic components
Answer: | D |
What type of function does the long bone perform?
A. acts as pivot
B. acts as pulley
C. work as lever
D. works as piston
Answer: | C |
Metabolism includes both anabolic and which other reaction?
A. enzymatic
B. biogenic
C. organic
D. catabolic
Answer: | D |
A virus is essentially dna or rna surrounded by a coat of what?
A. organism
B. acids
C. protein
D. paint
Answer: | C |
What is the process of generating electric current with a magnetic field?
A. mechanical induction
B. electromagnetic induction
C. magnetic induction
D. electromagnetic ordination
Answer: | B |
Increasing what property of dirt would make it easier to rinse off your hands?
A. viscosity
B. density
C. turbidity
D. solubility
Answer: | D |
Net production efficiency allows ecologists to quantify how efficiently organisms of a particular what incorporate the energy they receive into biomass?
A. trophic level
B. hypothesized level
C. neural level
D. sea level
Answer: | A |
Some hormones produced by the anterior pituitary regulate the production of hormones by other tissues belonging to what system?
A. cardiovascular
B. endocrine
C. digestive
D. nervous
Answer: | B |
A warm-air heating system uses what kind of energy to heat air?
A. atmospheric
B. nuclear
C. cosmic
D. thermal
Answer: | D |
Which type of galaxies contain very little gas and dust, are red to yellow in color, contain over a trillion stars and have mostly old stars?
A. blue elliptical galaxies
B. giant orbital galaxies
C. giant gaseous galaxies
D. giant elliptical galaxies
Answer: | D |
What is a controlled scientific test that often takes place in a lab?
A. an experiment
B. a viewing
C. an observeration
D. a testing
Answer: | A |
What causes the endometrium to thicken during a menstrual cycle?
A. testosterone
B. ovulation
C. estradiol
D. blood
Answer: | C |
What process refers to the conversion of atmospheric nitrogen to ammonia?
A. biological nutrient fixation
B. biological nitrogen fixation
C. biological ammonia fixation
D. biological respiratory fixation
Answer: | B |
What is it called when two species evolve matching traits?
A. Allopatric speciation
B. coevolution
C. interconnection
D. spontaneous mutation
Answer: | B |
What is the term for water that falls from clouds?
A. lightning
B. wind
C. precipitation
D. atmosphere
Answer: | C |
Echinoderms lack what type of system that in humans consists of the brain and spinal cord?
A. endocrine system
B. autonomic system
C. peripheral nervous system
D. centralized nervous system
Answer: | D |
What class of invertebrate animals has additional appendages called the chelicerae and the pedipalps?
A. fish
B. arthropod
C. arachnid
D. mammals
Answer: | C |
The burning of what type of fuels is a major source of sulfur oxides and nitrogen oxides?
A. synthetic
B. fossil
C. renewable
D. biofuels
Answer: | B |
What is the science of classifying living things is called?
A. taxonomy
B. physiology
C. entomology
D. methodology
Answer: | A |
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