Reactions that produce toxic gases should be performed in a ---
A. Laboratory fume hood
B. Beaker with a watch glass on top
C. Well-ventilated area of the lab
D. Warm, airtight drying oven
100
A cell that was deprived of mitochondria would not be able to produce__________.
A. energy
B. oxygen
C. carbon dioxide
D. water
100
Some plants have a hard waxy coating on their leaves that helps prevent water loss. In which environment do these plants most likely grow?
A. Desert
B. Marine
C. Grassland
D. Rain forest
100
A solution having an equal number of H+ ions and OH– ions will have a pH of —
A. 3
B. 7
C. 9
D. 11
100
An athlete sitting in a wheelchair at rest throws a basketball forward. Since the athlete and the wheelchair have greater mass than the basketball has, the athlete and the wheelchair will —
F. move backward at a lower speed than the basketball moves forward
G. travel the same distance as the basketball but in the opposite direction
H. move backward at a higher speed than the basketball moves forward
J. have the same forward momentum as the basketball
200
The safest way to dilute concentrated sulfuric acid is to add ___
A. a series of small volumes of water to the acid while stirring
B. the acid to water slowly while stirring constantly
C. the acid to a small volume of water and then add more water
D. dilute sulfuric acid to a small volume of the concentrated acid
200
Which of the following is a characteristic of most bacterial infections but not of a viral infection?
F. It can cause multiple symptoms.
G. It can affect different people differently.
H. It can be spread by inhalation.
J. It can be treated with an antibiotic.
200
Which of the following best describes a difference between a mutualistic relationship and a parasitic relationship?
F. Parasitism harms both organisms, while mutualism harms only one organism.
G. Parasitism benefits only one organism, while mutualism benefits both organisms.
H. Parasitism involves only two organisms, while mutualism involves many organisms.
J. Parasitism continues for many generations, while mutualism is limited to one generation.
200
When the fuse ignites the contents of a firework, oxygen is consumed as a result of which type of change?
A. Mass
B. Phase
C. Nuclear
D. Chemical
200
As a rocket rises, its kinetic energy changes. At the time the rocket reaches its highest point, most of the kinetic energy of the rocket has been —
F. permanently destroyed
G. transformed into potential energy
H. converted to friction
J. stored in bonds between its atoms
300
Objects of the same mass but of different sizes and shape were dropped from a given height. Their rates of free fall were measured and recorded. Which of the following is most likely the question this experiment was designed to answer?
A How does height affect the force of gravity?
B How does gravity affect objects of different densities?
C How do mass and weight affect falling objects?
D How do size and shape affect an object’s rate of free fall?
300
Cell membranes perform all the following functions except —
A. making nutrients for cells
B. holding cytoplasm within cells
C. regulating substances exiting cells
D. recognizing other cells
300
Birds and reptiles are similar in that they are vertebrates and they both lay eggs. However, reptiles have teeth and birds only do during embryonic development. What is a possible explanation for this?
A. reptiles can also be birds
B. they both share a common ancestor
C. they eat similar foods
D. reptiles can have beaks as well
300
A student compares the viscosities of two solutions at room temperature. The student uses a metal block and equal volumes of the two solutions in identical containers. Which procedure would provide the best comparison of the viscosities of the solutions?
A. Determining whether the block raises or lowers the density of either solution
B. Determining whether the block raises or lowers the temperature of either solution
C. Measuring the volume of liquid the block displaces in each solution
D. Measuring the time it takes the block to sink in each solution
300
A motor produces less mechanical energy than the energy it uses because the motor —
F. gains some energy through motion
G. stores some energy as electrons
H. converts some energy into heat and sound
J. uses some energy to increase in mass
400
Which set of equipment would be best to use to test the effect of temperature on solution acidity?
A A balance and a thermometer
B A pH meter and a barometer
C A balance and litmus paper
D A thermometer and a pH meter
400
Many viruses released into the air survive for only short periods of time. Which of the following is the most likely reason for this?
F. Viruses attract antibodies in the atmosphere.
G. Viruses require a low atmospheric pressure.
H. Viruses are hosts for bacteria that eventually destroy them.
J. Viruses are dependent on host cells of living organisms.
400
What will likely cause an increase in a predators in an ecosystem?
A. decrease in prey
B. reduced competition
C. increased competition
D. increase in human habitation
400
The elements in which of these sets have chemical properties that are the most similar?
A. K, Ca, Sc
B. O, S, Se
C. Na, Ca, Y
D. P, S, Cl
400
A cyclist travels at a constant rate of 5 m/s for 20 seconds. What is his acceleration?
A. 5 m/s
B. 20 m/s
C. 100 m/s
D. 0 m/s
500
Only 10% of the electrical energy operating a lightbulb is changed into visible light. Which instrument helps identify the energy change occurring to most of the remaining 90%?
A Triple-beam balance
B Thermometer
C Magnifying glass
D Prism
500
The kingdom Animalia includes everything except ___________.
A. jellyfish
B. humans
C. live oak trees
D. birds
500
A tick feeding off of a dog is an example of __________.
A. parasitism
B. mutualism
C. neutralism
D. commensalism
500
The observation that an air bubble rises is an example of _________.
A. density
B. viscosity
C. buoyancy
D. kinetic energy
500
A 2.25 kg fish swims in a pond at a constant rate of 56 meters in 96 seconds. What is the fish’s approximate speed?