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Baseball! Yet another way to review for the KCCT test
Question The diagram below shows a simple food web. Which animal is classified as an omnivore? a. red fox b. deer c. black bear d. rabbit
The picture shows the circular path of a toy plane being swung around on a string. What path would the toy take if the string broke? Question
A ball is dropped into the still water of a child’s swimming pool. Which of the following describes the transfer of energy involved? A.The gravitational potential energy will cause the ball to sink to the bottom with no movement of water. B.Wave energy in the form of ripples will move in a circle around and away from the ball. C.Kinetic energy will cause the ball to rise and fall with the waves until it moves to the side of the pool. D. The sound energy released from the ball will cause water to splash out of the pool.
Question Students in a science class placed ice cubes in a cup. They were studying variables that affect how long it takes the ice to melt. Select the variable that would most likely NOT affect the time it takes the ice to melt. 1. size of cup 2. size of the ice cube 3. number of students 4. temperature of the room
Question The atomic number of magnesium is 12. Its nucleus must contain A. 6 protons and 6 neutrons. B.4 protons and 8 neutrons. C.12 protons D.12 neutrons
Question A student added a small ball to a graduated cylinder containing 10 mL of water. What is the volume of the ball? A.5 mL B.10 mL C.15 mL D.20 mL
Question Which of the following diagrams best represents the relationship between galaxies, the universe, and solar systems?
Question The terms gas exchange, diaphragm, and inhale are most closely associated with which system in the human body? a.Circulatory b.Digestive c.Excretory d.Respiratory
Question Name two differences between plant and animal cells.
Question Which of the following statements is true about atoms? A. Atoms only vibrate in living things. B. Atoms vibrate only in living things and in once-living things. C. Atoms only vibrate in non-living things. D. All atoms in all substances vibrate.
Question A can of regular soda and a can of diet soda were dropped into a bucket of water. The can of regular soda sank to the bottom but the diet soda floated. Which of the following statements best explains this observation? a. the can of regular soda is less dense than the can of diet soda b. The can of regular soda is more dense than the can of diet soda c. The can of regular soda has more volume than the can of diet soda. d. The can of regular soda has a small volume than the can of diet soda.
Question Which of the following questions may best be answered by studying an organism’s chromosomes? a.What sex is the organism? b.Is the organism endangered? c.Where is the organism’s ecosystem? d.How does the organism obtain its food?
Question A student holds a book at rest in an outstretched hand. The force exerted on the book by the student is equal to the book’s ______. a. Mass b. Weight c. Volume d. Density
Question A ball is thrown straight up and then falls straight back down. When it attains maximum height, the ball’s velocity is ________________. a.Equal to its displacement b.Equal to its displacement divided by time c.At its maximum d.At its minimum
Question A container of cold water is dumped into a larger container of hot water. It is mixed and then let alone for a long time interval. The water temperature is found to a.Randomly vary from region to region in the container b.Be uniform throughout the container c.Fluctuate at all positions in the container d.Be greater at the bottom of the container.
Question Objects appear different in size and shape in a container of water due to a.Refraction of the light waves b.Interference of the water and light waves c.Polarization of the light waves d.Diffraction of the light waves
Question Extremely high temperatures are needed for fusion reactors to function efficiently. What state of matter is most common at these temperatures? a.Gas b.Liquid c.Solid d.Plasma
Question Which action will result in a product with new chemical properties? a.Shredding a newspaper b.Breaking a mirror c.Cutting wood d.Popping popcorn
Question At convergent plate boundaries of oceanic and continental crust A. oceanic crust is subducted. B. continental crust is subducted. C. oceanic crust is created. D. no associated volcanism occurs.
Question Sterling silver is a combination of silver and copper. Which of the following is also a combination of two or more metals? a.Aluminum b.Lead c.Gold d.Brass
Question All living things contain which element? a.Helium b.Sodium c.Copper d.Carbon
Question A balloon has a negative charge. A glass rod has a positive charge. What will happen when the glass rod is brought near the balloon? a.The balloon will be attracted to the rod. b.The balloon will be repelled by the rod. c.The balloon will remain in place. d.The balloon will spin in circles.
Question A cup of water at 40 o C and a cup of water at 5 o C are left on a table. Which graph correctly shows the temperature of the two cups of water as time passes?
Question The praying mantis is a predatory insect that often eats moths. The graph below shows the relative numbers of two species of moths over 12 weeks after the introduction of the predatory praying mantis. What characteristics of this ecosystem is best indicated from this graph? A. Species B was preferred as food over species A. B. Species B may replace species A in this environment. C. Species B will reproduce more rapidly than species A. D. Species B was more abundant at the beginning of this time period than species A.
Question The bones of a whale flipper are similar to the bones of a bat wing as shown in the illustration below. What does this similarity in bone structure suggest about the whale and the bat? A.They use the same methods to travel. B.They evolved from a common ancestor C.They can migrate to the same locations D.They can manipulate objects in the same way.
Question Midocean ridges are usually found at a.Convergent plates b.Divergent plates c.Plates sliding past one another d.Hot spots
Question A researcher found shark fossils on top of a mountain. This evidence suggest which of the following about this region? a.It was once below a waterfall. b.It was once part of a river bed. c.It was once covered by an ocean. d.It was once near a freshwater lake.
Question From year to year, farmers rotate different crops in the fields to improve soil nutrients. Why is crop rotation also an effective pest management method? a.It allows chemicals to kill more pests. b.It creates crops that are pest resistant. c.It interrupts the life cycles of pests. d.It allows pests to overpopulate.
Question Where is an igneous rock such as pumice most likely formed? a.In a desert b.In a creek bed c.Near a volcano d.Under a glacier
Question Moving water was the most important factor in forming which of these? a.The Grand Canyon b.San Andreas Fault c.The Rocky Mountains d.Mount St. Helens volcano
Question Which of the following questions is testable in a scientific investigation? a.Are dogs better pets than cats? b.Are dogs happy when they are walked? c.Are cats more active at night than during the day? d.Are cats easier to take care of than dogs?
Question Where is most of the Earth’s water located? a.Glaciers b.Lakes c.Oceans d.Rivers
Question Transpiration is a vital part of the water cycle. It is a part of A. Condensation B. Precipitation C. Evaporation D. Collection
Question Which of the following converts electrical energy into motion? a.Light switch b.Electric stove c.Light bulb d.Electric fan
Question Which best describes a parallel circuit? a.Electricity flows along one pathway. b.The flow of electricity comes from one source. c.Electricity flows along more than one pathway. d.The flow of electricity comes from more than one source.
Question A human male carries the sex chromosomes a.XX b.XY c.YY d.None of these
Question Prokaryote cells have no nucleus. Which of the following is an example of a prokaryote cell? a.Virus b.Bacteria c.White blood cell d.Algae
Question The chart below shows a part of Mohs hardness scale for minerals. MineralTalcGypsumCalciteFluoriteapatite Hardness12345 A student is testing an unknown mineral for hardness. The unknown mineral is tested against fluorite, but neither mineral scratches the other. Which of the following conclusions can the student accurately make? A, The unknown mineral and apatite will not scratch each other. B.The unknown mineral and calcite will not scratch each other. C.The unknown mineral will scratch apatite. D.The unknown mineral will scratch calcite.
Question. The elements on the left hand side of the Periodic Table are A. metals. B. metalloids. C. non-metals. D. all gases.
Question To test a theory, Tommy set out two beakers in a room that measured 220 o C. In one beaker he poured 50 mL of water at 100 o C and in the other he poured 50 mL of water at 800 o C. He hypothesized that in 24 hours the water at 800 o C would be at 220 o C, but the water at 100 o C would have stayed the same. Which of the following is correct? A. Tommy was correct, one was at 100 o C, the other was at 220 o C. B. Tommy was wrong, both were at 220 o C. C. Tommy was wrong, neither had changed. D. Tommy was wrong, one was at 220 o C, the other was closer to 500 o C.
Question The number of chromosomes in a sex cell is A. double the number of chromosomes found in body cells. B. triple the number of chromosomes found in body cells. C. one half the number of chromosomes found in body cells. D. one third the number of chromosomes found in body cells.
Question Which is NOT a characteristic of the modern atomic model? A. Electrons surround the nucleus. B. An atom is neutral. C.The nucleus takes up most of the volume of the atom. D. The nucleus is positively charged.
Question Describe the energy transformations that occur in a portable CD player. A. nuclear to electrical to mechanical B. electrical to chemical to sound C. chemical to electrical to sound D. heat to electrical to sound
Question A spring scale is pulled downwards and readings are recorded. Distance pulled Spring scale reading 1.0 cm 4 N 1.5 cm 6 N 2.0 cm 8 N 2.5 cm10 N If the spring is pulled 3.5 cm, the spring should read A. 12 NB. 13 NC. 14 ND. 15 N
Question A force of 5 N is required to increase the speed of a box from a rate of 1m/s to 3 m/s over 5 s along a level surface. What change would most likely require additional force to produce the same results? a.Reduce the mass of the box b.Increase the mass of the box c.Make the surface of the box smooth d.Make the surface of the floor smooth
Question What characteristic of motion could change without changing the velocity of the object? a.The speed b.The position c.The direction d.The acceleration
Question In comparison of metals to nonmetals, metals tend to have a.Lower melting points and greater conductivity than nonmetals. b.Lower conductivity and lower density than nonmetals. c.Higher density and lower melting points than nonmetals. d.Greater conductivity and high melting points than nonmetals.
Question Which of the following is found farthest from the center of an atom? a.Nucleus b.Proton c.Neutron d.electron
Question Which of the following best describes an atom? a.Protons and electrons grouped together in a random pattern b.Protons and electrons grouped together in an alternating pattern c.A core of protons and neutrons surrounded by electrons d.A core of electrons and neutrons surrounded by protons
Question To express the distance between the Milky Way and other galaxies, the most appropriate measurement would be a.Miles b.Kilometers c.Light-years d.Astronomical units
Question A piece of pine wood floats on the surface of the lake because the water exerts a.An upward force equal to the weight of the wood b.A downward force equal to the weight of the wood c.An upward force equal to the weight of the displacement water d.A downward force equal to the weight of the displacement water
Question The following equations represent chemical reactions. 1.2Na + H 2 O NaOH + H 2 2.H 2 + O 2 H 2 O 3.Mg + Cl 2 MgCl 2 4,NaOH + MgCl 2 NaCl + MgOH Which equation shows that the total mass during a chemical reaction stays the same? a. 1b. 2c. 3d. 4
Question The table below shows the pH and reaction to litmus of four body fluids. Body fluidpHRed litmusBlue litmus Blood7.4Turns blueNo change Bile8.2Turns blueNo change Saliva6.8No changeTurns red Gastric juice1.7No changeTurns red This table shows that gastric juice is a.Very acidicc. Positively charged b.Very basicd. Negatively charged
Question The inheritance of a trait in humans can best be determined by a.A single allele b.One or more pairs of alleles c.One pair of chromosomes d.The sex chromosomes of the offspring
Question A mineral supplement designed to prevent the common cold was given to two groups of people during a scientific study. Group 1 received 50 mg/day. Group 2 received 100 mg/day. After 8 weeks neither group reported a case of the common cold. Which of the following would have made the outcome of this study more valid? a.Test only one group with 150 mg of the supplement. b.Give the supplement for both weeks for only 6 weeks. c.Create a third group to receive 75 mg of the supplement. d.Create a third group that does not receive the supplement.
Question Which of the following cell types is formed by meiosis? a.Muscle cells b.Sperm cells c.Skin cells d.Blood cells
Question Which of the following structures is not found in bacteria? a.Ribosomes b.Mitochondria c.Nucleus d.Cell membrane
Question In humans the allele for unattached earlobes (L) is dominant to the allele for attached earlobes (l). Punnett Square L l L 1 2 l 3 4 Based on the PS above, a child with attached earlobes is indicated in box A. 1 B. 4 C. 2, 3 D. 1, 2, 3
Question How is natural selection in the evolution of long-necked giraffes best explained? a.Shorter necked giraffes were killed by longer neck giraffes. b.Giraffe necks grew longer because of the bone structure of the animals. c.Giraffes with longer necks survived because they were better suited to the environment. d.Long necked giraffes mated only with other long necked giraffes.
Question Skeletal structures are common between two animals of different species. These structures probably exist because both species a.Have a common food source. b.Live in the same environment. c.Have survived until the present time. d.Have a common ancestor.
Question The purpose for giving a person a vaccine is to a.Introduce chemicals that destroy viruses. b.Stimulate an immune response. c.Prevent inflammation. d.Cure a disease.
Question Two students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden. Which of the following could be an unavoidable source of experimental error? a.Length of the study b.Variation in the strawberry plants c.The cost of watering the plants d.Fertilization during the study
Question In most stable freshwater environments populations of Daphnia are almost entirely female and reproduce asexually. However, males are observed in low oxygen environments or when food is scarce. Based on these observations, a researcher suggests that male Daphnia develop in response to unfavorable environmental conditions. This is an example of a a.Theory b.Conclusion c.Hypothesis d.Result
Question The cell membrane of a red blood cell will allow water, carbon dioxide, oxygen, and glucose to pass through. Because other substances are blocked from entering, this membrane is called a.Perforated b.Semi-permeable c.Non-conductive d.Permeable
Question Eukaryotic cells are differentiated from prokaryotic cells because eukaryotic cells a. Are much smaller. b. Have permeable membranes. c. Have a higher rate of reproduction. d. Have nuclei.
Questions Which of these organisms would most likely be found at the top of an energy pyramid? a.Clams b.Sardines c.Sharks d.Kelp
Question Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much that they displaced many native species of plant eaters. What is the most logical explanation for their increased numbers? a.Rabbits have a high death rate. b.There are few effective predators. c.Additional rabbit species have been introduced. d.There is an increase in rabbit competitors.
Question Complete burning of plant material returns carbon primarily to the a.Soil. b.Water c.Vegetation. d.Atmosphere.
Question A healthy individual is a carrier of a lethal allele but is unaffected by it. What is the probable genotype of this individual? a.Two dominant normal alleles b.One recessive lethal allele and one dominant lethal allele c.One recessive lethal allele and one dominant normal allele d.One dominant lethal allele and one recessive normal allele
Question Earth has undergone some catastrophic changes from time to time. Which of these most likely explains why life on Earth continued following these catastrophes? a.Dominant species had a slow mutation rate. b.Many species filled the same niche. c.A strong species had many characteristics. d.A wide diversity of species existed.
Question Which statement best describes the density of an atom’s nucleus? a.The nucleus occupies most of the atom’s volume but contains little of its mass. b.The nucleus occupies very little of the atom’s volume and little of its mass. c.The nucleus occupies most of the atom’s volume and most of its mass. d.The nucleus occupies very little of the atom’s volume but contains most of its mass.
Question Of four different laboratory solutions, the one with the highest acidity has a pH of a.11 b.7 c.5 d.3
Question A day on Saturn takes about 10 hours. Which fact best explains this short day? a.Saturn is less dense than Earth. b.Saturn is much farther away from the sun than the Earth is. c.Saturn rotates more rapidly than Earth. d.Saturn’s orbit has greater eccentricity than Earth.
Question Which planet was formed from light gases from the outer solar nebula? a.Mercury b.Venus c.Mars d.Uranus
Question Evidence suggests that Earth is about 4.6 billion years old, even though no Earth rocks have been found that can be dated at more than 4 billion years old. This discrepancy is most likely caused by Earth’s original crust being a.Difficult to date so precisely. b.Subject to intensive erosion. c.Blasted away during Earth’s formation. d.Destroyed by solar radiation.
Question The existence of extraterrestrial life may never be proven, but this idea will become more scientifically acceptable over time if a.No one disputes this in a scientific forum b.Hypotheses are made related to the idea. c.Alternate hypotheses are proposed and confirmed. d.Increasing scientific evidence supports the idea.
Question What is the source of energy for the sun? a.Hydrogen fusion b.Internal combustion c.Nuclear fission of metals d.Burning of solar gases
Question Which of the following is best evidence that Earth’s continents were once in a vastly different position than they are today? a.Penguins are found only in the Southern Hemisphere b.Fossils of tropical plants are found in Antarctica. c.Volcanoes encircle the Pacific Ocean. d.Major rivers form deltas from continental erosion.
Question The sun is an average yellow star in the Milky Way galaxy, which is described as a.An elliptical galaxy. b.A spiral galaxy. c.Irregular galaxy. d.A dwarf galaxy.
Question The convergence of two continental plates would produce a.Island arcs. b.Rift valleys. c.Folded mountains. d.Trenches.
Question Which of the following provides evidence for plate tectonics? a.Sea-floor topography b.Ocean currents c.Coriolis effect d.Atmospheric temperatures
Question Earthquake vibrations are detected, measured, and recorded on instruments called a.Sonargraphs. b.Seismographs. c.Richter scales. d.Magnetometers.
Question Which of the following energy sources is most likely to be abundant in California due to its position on a plate boundary? a.Wind b.Nuclear c.Solar d.Geothermal
Question The moon is very hot on the side facing the sun and very cold on the dark side. This extreme temperature difference is primarily due to the moon’s a.Mineral composition. b.Thin atmosphere. c.Reflective rocks. d.Lack of volcanic activity.
Question Venus is warmed by solar radiation, but its thick cloud cover increases the temperature because the clouds a.Prevent the escape of heat into space. b.Convert solar radiation into heat. c.Absorb short wavelengths, leaving heat. d.Produce heat as they are pushed by strong winds.
Question Air moving from the poles toward the equator turns west. The primary cause of this global deflection is a.The shape and size of land masses. b.Larger cities surrounded by farm lands. c.Changes in the magnetic field. d.Rotation of the planet.
Question Which of these effects generally occurs as the result of a warm air mass and a cooler air mass converging at Earth’s surface? a.The sky becomes clear. b.Winds die down. c.Cloud formation decreases. d.Stormy weather patterns develop.
Question Earth’s atmosphere is divided into layers that are based upon their a.Water content. b.Relative humidity. c.Gas content d.Temperature gradient.
Question Name the four layers of the atmosphere in order from bottom to top.
Question The primitive atmosphere was deficient in free oxygen. What process was primarily responsible for the development of the present percentage of free oxygen in the Earth’s atmosphere? a.Outgassing b.Photosynthesis c.Volcanic eruptions d.Oxidation of iron-based minerals
Question A communication satellite is in a circular orbit around the Earth. If the speed of the satellite is constant, the force acting on the satellite is a.zero. b.Decreasing. c.Points toward the center of Earth at all times. d.Points in the direction the satellite is moving.