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What sort of gas is found in balloons and blimps, and is used to make them float in the sky?
A. helium
B. radon
C. oxygen
D. hydrogen
Answer: | A |
What color is pyrite?
A. silver
B. blue
C. gold
D. black
Answer: | C |
Planting a row of trees around a field or erecting a fence on a sand dune helps prevent what form of erosion?
A. rain
B. fire
C. water
D. wind
Answer: | D |
What structure connects the fetus to the placenta, allowing the exchange of gases?
A. skin cord
B. belly button
C. umbilical cord
D. sediment cord
Answer: | C |
Glass, rubber, and plastics are examples of which type of solids?
A. dubious
B. porous
C. aqueous
D. amorphous
Answer: | D |
What is the process bacteria use to break down chemicals into food?
A. cellular respiration
B. biosynthesis
C. chemosynthesis
D. gametogenesis
Answer: | C |
A fully developed placenta is made up of a large mass of what?
A. blood vessels
B. brain tissues
C. estrogen hormones
D. plant cells
Answer: | A |
What is an element that tend to be malleable?
A. mixture
B. metal
C. actinide
D. lanthanide
Answer: | B |
As a diver descends, the increase in pressure causes the body’s air pockets in the ears and lungs to do what?
A. heat up
B. blow up
C. compress
D. expand
Answer: | C |
Many deleterious alleles have such severe effects that a homozygous embryo spontaneously aborts long before what?
A. LIfe
B. birth
C. couple
D. baby
Answer: | B |
What kind of reaction, in general, keeps stars shining?
A. fission
B. fusion
C. evolution
D. magnetism
Answer: | B |
What is the most important factor determining soil type?
A. landscape
B. climate
C. plant life
D. ecology
Answer: | B |
What are the structural and functional units of the kidney called?
A. aeons
B. nephrons
C. Ions
D. caldrons
Answer: | B |
What structure, containing many internal membranes, is the site of photosynthesis?
A. genome
B. mitochondria
C. chloroplast
D. ribosome
Answer: | C |
During the day, what type of energy is transferred from the air over the land to the air over the water?
A. thermal
B. nuclear
C. magnetic
D. atmospheric
Answer: | A |
Which nerve carries electrical signals from the rods and cones to the brain?
A. axon
B. auditory
C. optic
D. neurotransmitter
Answer: | C |
What is the only thing that can change an asteroid?
A. a situation
B. weather
C. a wind
D. a collision
Answer: | D |
Radon is inert and generally unreactive because it is which kind of gas?
A. ideal gas
B. transitive gas
C. ignoble gas
D. noble gas
Answer: | D |
What are the two ways animals can manage their internal environment?
A. regulating or conforming
B. sweating or sleeping
C. digestion or excretion
D. adaptation or mutation
Answer: | A |
What may the jointed appendages of arthropods be used for?
A. crawling
B. jumping
C. digging
D. walking
Answer: | D |
A sperm cell and an egg cell fuse to become what?
A. embryo
B. fertilized egg
C. unfertilized egg
D. fetus
Answer: | B |
The muscles in arteries and veins that are largely responsible for regulation of blood pressure are known as what type?
A. smooth muscles
B. elongated muscles
C. vascular muscles
D. opposing muscles
Answer: | A |
An inversion may result when what kind of mass moves over cold ground?
A. warm air
B. cold water
C. cold air
D. warm water
Answer: | A |
The eardrum is part of what part of the ear?
A. outer
B. thin
C. main
D. inner
Answer: | A |
What is never lost and just changes forms?
A. food
B. energy
C. fuel
D. life
Answer: | B |
What is the term for a mixture that varies in its composition?
A. amorphous
B. heterogeneous
C. homogeneous
D. mixed composition
Answer: | B |
What are the "building blocks" of proteins?
A. amino acids
B. nucleic acids
C. enzymes
D. hormones
Answer: | A |
What is responsible for our sense of balance?
A. our eyes
B. our limbs
C. our ears
D. our feet
Answer: | C |
What technology do scientists use to create models?
A. computers
B. patterns
C. microscopes
D. calculators
Answer: | A |
What essential molecules can be harmful if ingested in large amounts, especially if they contain saturated fatty acids from animal foods?
A. lipids
B. hydrogen
C. oxygen
D. helium
Answer: | A |
What are two ways cnidarians are able to reproduce?
A. asexually and sexually
B. internally and externally
C. spawning and sexual
D. mitosis and meiosis
Answer: | A |
In what human organ system would you find live e. coli bacteria?
A. respiratory system
B. skeletal system
C. circulatory system
D. digestive system
Answer: | D |
What carries blood away from the heart?
A. pores
B. capillaries
C. veins
D. arteries
Answer: | D |
What is the most important characteristic of a homogeneous mixture?
A. high density
B. nonreactive
C. uniform composition throughout
D. very reactive
Answer: | C |
The domain geometry for a molecule with four electron pairs is called what?
A. bent
B. tetrahedral
C. trigonal planar
D. linear
Answer: | B |
What is the gel-like material between the cell membrane and the nucleus called?
A. ribosome
B. vacuole
C. cytoplasm
D. mucus
Answer: | C |
Like mammals and birds, and unlike other reptiles, crocodiles have how many chambers in their heart?
A. one
B. two
C. six
D. four
Answer: | D |
What is the phenomenon in which light and sound waves become circular at the point source of a barrier?
A. diffraction
B. reflection
C. refraction
D. sonic wave
Answer: | A |
What is the name of the relatively large gland in the neck that secretes thyroxin?
A. thyroid
B. Pituitary
C. Thyroid
D. Pancreas
Answer: | A |
Amplification that occurs in which cells often requires signal transduction pathways involving second messengers?
A. axons
B. optic nerves
C. catayst cells
D. sensory receptor
Answer: | D |
As adults, amphibians are completely _______, meaning they feed on other animals.
A. carnivorous
B. herbivorous
C. monogamous
D. omnivorous
Answer: | A |
Approximately how many billion years ago did our solar system begin?
A. nine billion
B. five billion
C. three billion
D. four billion
Answer: | B |
A type of what organism causes ergot, a disease that impacts crops directly and has more devastating effects on animals?
A. insects
B. bacteria
C. fungus
D. virus
Answer: | C |
Plant-like protists are commonly called what?
A. algae
B. seaweed
C. sponge
D. fungus
Answer: | A |
Which cell gives rise to all cells of the human body?
A. signaler stem cell
B. schwann stem cell
C. omnipoten stem cell
D. totipotent stem cell
Answer: | D |
What term describes the long tube that connects the mouth to the anus?
A. metabolism tract
B. lungs tract
C. gastrointestinal tract
D. esophagus tract
Answer: | C |
In some ways, a collection of gas molecules represents the simplest form of what?
A. energy
B. protein
C. matter
D. life
Answer: | C |
Are vesicles larger or smaller than vacuoles?
A. narrower
B. smaller
C. wider
D. larger
Answer: | B |
The duodenum is the first and the shortest part of what, and is where most chemical digestion takes place?
A. large intestine
B. stomach
C. small intestine
D. rectum
Answer: | C |
Which system consists of all the bones of the body?
A. digestive system
B. circulatory system
C. skeletal system
D. nervous system
Answer: | C |
What is rusting an example of?
A. Decomposition
B. contamination change
C. radiation change
D. chemical change
Answer: | D |
What molecule consists of two atoms of hydrogen and one atom of oxygen?
A. hydrogen peroxide
B. air
C. water
D. carbon monoxide
Answer: | C |
All compounds, whether ionic or covalent, must be what?
A. abnormal neutral
B. electrically neutral
C. metallic neutral
D. organic neutral
Answer: | B |
Which is the most common sti (sexually transmitted infection) in the united states?
A. chlamydia
B. syphilis
C. AIDS
D. giardia
Answer: | A |
What do all chemical reactions need to get started?
A. potential energy
B. expression energy
C. activation energy
D. kinetic energy
Answer: | C |
What organ does asthma periodically cause to narrow?
A. liver
B. intestines
C. lungs
D. ovaries
Answer: | C |
Silver, gold, and copper all conduct what very well?
A. light
B. microwaves
C. sound
D. electricity
Answer: | D |
Pakicetus and rodhocetus are considered to be ancestors of modern what?
A. rodents
B. whales
C. primates
D. hominins
Answer: | B |
Chemical and physical changes in a system may be accompanied by an increase or a decrease in the disorder of the system, corresponding to an increase or decrease in what?
A. volume
B. vibration
C. enthalpy
D. entropy
Answer: | D |
What is the only way to completely avoid stis?
A. contraceptive use
B. cover your mouth
C. avoid sexual contact
D. oral sex
Answer: | C |
What is an ion that is in common to both salts in a solution?
A. native ion
B. regular ion
C. common ion
D. strong ion
Answer: | C |
Prokaryotes and the nitrogen cycle nitrogen is a very important element for life because it is part of proteins and this?
A. nerve cells
B. molecules
C. nuclear forces
D. nucleic acids
Answer: | D |
What property is a measure of the average kinetic energy of molecules?
A. density
B. velocity
C. temperature
D. mass
Answer: | C |
A measure of the disorder of a system is called its what?
A. function
B. lose
C. entropy
D. spectral
Answer: | C |
What influence does the horizontal motion of a projectile have on free fall?
A. decrease acceleration
B. none
C. vertical
D. increase acceleration
Answer: | B |
Larger animals expend more of what to achieve locomotion?
A. neurons
B. time
C. distance
D. energy
Answer: | D |
Subshells are subdivisions of what groupings of electrons that can be found surrounding atoms?
A. orbitals
B. isotopes
C. analogous
D. globals
Answer: | A |
The number of moles of solute in 1 kg of solvent is defined as what?
A. pollenation
B. singularity
C. molarity
D. kilocalorie
Answer: | C |
What is the name for the pores in leaves that allow a plant to retain water or exchange gases?
A. rhizomes
B. stomata
C. neurons
D. chloroplasts
Answer: | B |
What is part of a cycle that holds an element or water for a long period of time called?
A. a ditch
B. a reservoir
C. a holding tank
D. homeostasis
Answer: | B |
What theory states that all organisms are made up of one or more cells?
A. the micro theory
B. the cell theory
C. the atomic theory
D. the molecular anatomy theory
Answer: | B |
What does rearrangements of chromosomes contribute to the emergence of?
A. fewer species
B. extinction
C. clones
D. new species
Answer: | D |
In the universe as a whole, what is the most common element?
A. hydrogen
B. carbon
C. oxygen
D. helium
Answer: | A |
What are substances that cannot be broken down into simpler substances with different properties called?
A. compounds
B. atoms
C. elements
D. molecules
Answer: | C |
What gas, that is dissolved in solution, is used in carbonated beverages?
A. carbon dioxide
B. hydrogen peroxide
C. phosphorus dioxide
D. carbon monoxide
Answer: | A |
Fluoride ion is widely used in water supplies to help prevent what?
A. chlorine taste
B. tooth decay
C. rust
D. bacteria
Answer: | B |
Amino acids are joined together to form a chain at what molecular structure?
A. DNA
B. chromosomes
C. ribosomes
D. chloroplasts
Answer: | C |
What is the name of the science that studies matter and the changes material substances undergo?
A. biology
B. geology
C. chemistry
D. physics
Answer: | C |
Which process changes rocks by heat and pressure?
A. Changes
B. sediments
C. weathering
D. metamorphism
Answer: | D |
What is defined as an antigen that causes an allergy?
A. an expectorant
B. a disinfectant
C. a pollutant
D. an allergen
Answer: | D |
What can be linked together to form disaccharides or polysaccharides?
A. amino acids
B. monosaccharides
C. carbohydrates
D. nitrates
Answer: | B |
What were the first living things to evolve on earth?
A. carbon
B. eukaryotes
C. prokaryotes
D. DNA
Answer: | C |
All members of a species living together form a what?
A. group
B. organization
C. family
D. population
Answer: | D |
What type of disturbance do even dominant plants depend on in many biomes?
A. periodic
B. mass extinction
C. radiation
D. seismic force
Answer: | A |
What type of behaviors are triggered by pheromones in moths?
A. courtship
B. exhibit
C. illuminating
D. peculiar
Answer: | A |
What do organisms use to store energy?
A. lipids
B. metabolytes
C. proteins
D. tissues
Answer: | A |
The scientific practice of classifying organisms is also known as what?
A. taxodermy
B. taxonomy
C. terminology
D. methodology
Answer: | B |
What is the type of cell division that produces gametes?
A. electrolysis
B. meiosis
C. mitosis
D. budding
Answer: | B |
The force applied to an object is called?
A. gravity
B. strain
C. torque
D. stress
Answer: | D |
What is the largest mineral group, comprising over 90% of earth's crust?
A. silicates
B. oxides
C. carbonates
D. soils
Answer: | A |
Sound navigation and ranging is an acronym for what, which is used to locate underwater objects such as submarines?
A. radar
B. GPS
C. sonar
D. sound transmission
Answer: | C |
What is the term for the difference in elevation between two contour lines?
A. mapping interval
B. height
C. design interval
D. contour interval
Answer: | D |
The same reaction regenerates pyruvate, which is transported to which cells?
A. symbionts
B. outermost
C. mesophyll
D. skin
Answer: | C |
What large carboxylic acid with three ionizable hydrogen atoms gives some fruits a sour or tart flavor?
A. ammonia acid
B. beryllium acid
C. hydrochloric acid
D. citric acid
Answer: | D |
How does sap get to the tops of tall trees?
A. through suction power
B. through negative pressure
C. through pressure from below
D. via Coriolis forces
Answer: | B |
Each megasporangium has a single functional one of what?
A. megaspore
B. cocklebur
C. antispore
D. spicule
Answer: | A |
Somatosensation refers to what of the five senses?
A. balance
B. sight
C. touch
D. thought
Answer: | C |
Respiratory distress syndrome results from insufficient production of what?
A. carbon dioxide
B. lung tissue
C. pulmonary surfactant
D. alveoli
Answer: | C |
Redox reactions can always be recognized by a change in what number of two of the atoms in the reaction?
A. oxidation
B. oxygen
C. fermentation
D. precipitation
Answer: | A |
In humans, the anus is attached to what kind of intestine?
A. internal
B. small
C. huge
D. large
Answer: | D |
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