Plate Tectonics
Where two plates rub past each other in opposite directions is a
A. Convergent boundary
B. Transform boundary
C. Hot spot
D. Divergent boundary
According to Newton's 3rd law, forces always occur in ____ pairs.
A. Equal but complementary
B. Equal but opposite
C. Unequal but opposite
D. Unequal but complementary
B. Equal but opposite
Energy in an ecosystem's energy pyramid always flows from __________.
A. decomposers to consumers
B. producers to consumers
C. consumers to producers
D. decomposers to producers
B. producers to consumers
The atomic number of an element indicates which of the following?
A. the number of neutrons in an atom
B. the sum of the protons and electrons in an atom
C. the sum of the neutrons and protons in an atom
D. the number of protons in an atom
D. the number of protons in an atom
The place where two plates collide is called a
A. Transform boundary
B. Hot spot
C. Divergent boundary
D. Convergent boundary
D. Convergent boundary
What causes an object's motion to change speed?
A. Size and shape
B. Volume
C. Forces
D. Mass
C. Forces
Galveston Bay, an estuary in Southeast Texas, is shown below. The amount of salt in the water changes with the tides. Sometimes the water is mostly freshwater, and sometimes it is mixed with saltwater. Various plant species live in this environment and provide a habitat for other organisms.
To successfully live in an estuary, a plant species must have an adaptation that allows it to —
A. filter excess salt
B. absorb large amounts of water
C. store excess gases
D. produce large amounts of food
A. filter excess salt
Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom. Based on this information, what is the mass number?
A. 94
B. 107
C. 154
D. 47
B. 107
The process that continually adds new crust is:
A. Subduction
B. Earthquakes
C. Sea-floor spreading
D. Convection
C. Sea-floor spreading
The seat belts are provided in the cars so that if the car stops suddenly due to an emergency braking, the persons sitting on the front seats are not thrown forward violently and saved from getting injured. Can you guess the law due to which a person falls in forward direction on the sudden stopping of the car?
Discuss
A. Newton’s first law of motion
B. Newton’s second law of motion
C. Newton’s third law of motion
D. Newton’s law of gravitation
A. Newton’s first law of motion
Copper compounds are used in large amounts to control the growth of algae and other aquatic plants. Copper interferes with photosynthesis in these organisms. What would be the most likely result of an accidental spill of these compounds in an aquatic environment?
A. The zooplankton population would increase.
B. The fish would grow larger than usual.
C. The plant populations would be reduced.
D. The plants would increase in size but decrease in number
C. The plant populations would be reduced.
Which of the following atoms has six valence electrons?
A. silicon (Si)
B. magnesium (Mg)
C. argon (Ar)
D. sulfur (S)
D. sulfur (S)
The mid-ocean ridge occurs along a
A. Convergent boundary where new crust is formed
B. Transform boundary where crust is subducted
C. Divergent boundary where sea-floor spreading takes place
D. Divergent boundary where subduction takes place
C. Divergent boundary where sea-floor spreading takes place
An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table. The force required to keep the object moving with the same velocity is:
A. 32 N
B. 0 N
C. 2 N
D. 8 N
D. 8 N
What often happens when two species operate in the same niche with limited resources?
A. Both populations will grow without limit.
B. They will share resources without affecting either population.
C. They will contribute to an increase in resources over time.
D. They will compete for available resources, causing a decline in one population and in the shared resource.
D. They will compete for available resources, causing a decline in one population and in the shared resource.
How many atoms in all are in one molecule of ferric sulfide?
Fe2S3
A. 7
B. 6
C. 5D. 2
C. 5
Volcanoes are most likely to occur along a
A. Divergent boundary
B. Convergent boundary
C. Transform boundary
D. Sea-floor spreading
B. Convergent boundary
In a rocket, a large volume of gases produced by the combustion of fuel is allowed to escape through its tail nozzle in the downward direction with the tremendous speed and makes the rocket to move upward.Which principle is followed in this take off of the rocket?
A. Moment of inertia
B. Conservation of momentum
C. Newton’s third law of motion
D. Newton’s law of gravitation
C. Newton’s third law of motion
In which situation would you expect the lowest level of competition for resources among populations in an ecosystem?
A. A forest experiences a rainfall
B. A grassland experiences a flood
C. A polar ecosystem experiences warm temperatures
D. A mountain experiences a drought
A. A forest experiences a rainfall
A scientist spilled a few drops of dilute hydrochloric acid (HCl) on a lab table. For safety purposes, the scientist sprinkled some baking soda (NaHCO3) onto the spill. Which observation would provide the best evidence that a chemical reaction occurred?
A. The hydrochloric acid evaporated, leaving only the baking soda.
B. Some of the baking soda dissolved in the hydrochloric acid.
C. The baking soda absorbed the hydrochloric acid.
D. The baking soda and hydrochloric acid combined, and bubbles formed.
D. The baking soda and hydrochloric acid combined, and bubbles formed.