1 Flashcards
(111 cards)
The fact that, in general, liquids and gases expand when heated gives rise to
a. convection currents in fluids due to changing masses.
b. convection currents in fluids due to changing densities.
c. heat transfer by conduction.
d. convection currents in fluids due to constant temperatures
b. convection currents in fluids due to changing densities.
A student is holding a cold piece of metal in her hand. While she is holding the piece of metal, her hand gets colder. Does the piece of metal get warmer? Why or why not?
a. Yes, the piece of metal will get warmer because some cold is transferred from the metal to the student’s hand.
b. Yes, the piece of metal will get warmer because some thermal energy is transferred from the student’s hand to the metal.
c. No, the piece of metal will stay at the same temperature because an equal amount of thermal energy and coldness is exchanged between the student’s hand and the metal.
d. No, the piece of metal will stay at the same temperature because neither thermal energy nor coldness is transferred between the student’s hand and the metal.
b. Yes, the piece of metal will get warmer because some thermal energy is transferred from the student’s hand to the metal.
What is the average distance of the Earth from the Sun?
a. 93M mi
b. 145M mi
c. 93M km
d. 145 M km
a. 93M mi
Which of the following will remain unchanged when a sound wave travels in air or in water?
a. Amplitude
b. Wavelength
c. Frequency
d. Speed
c. frequency
The three secondary colors of light are ________.
a. cyan, magenta, green
b. cyan, magenta, and yellow
c. green, yellow, violet
d. red, blue, yellow
b. cyan, magenta, and yellow
Which of the following is NOT a mineral?
a. olivine
b. limestone
c. calcite
d. quartz
b. limestone
You observed that the cell undergoes both growth and DNA replication. In what phase in cell cycle do these processes take place?
a. In interphase where the cell prepares for division.
b. In G1 phase only, where the cell increases in size.
c. In both interphase and M phase, where the cell undergoes cytokinesis.
d. In M phase only, where the number of chromosomes of parent and progeny are the same.
a. In interphase where the cell prepares for division.
Which of the following is the correct sequence on the phases of mitosis?
a. S-Phase, Metaphase, Interphase, Telophase
b. Prophase, Metaphase, Anaphase,
Telophase
c. Prophase, Metaphase, Interphase, Telophase
d. Interphase, Prophase, Metaphase, Telophase
b. Prophase, Metaphase, Anaphase, Telophase
In meiosis, the number of chromosomes of the mother cell compared to the resulting daughter cell’s chromosome is
a. doubled
b. halved
c. tripled
d. the same
b. halved
Two metal rods are made of the same material and have the same cross-sectional area. The two rods differ only in their lengths which we call L and 3L, respectively. You heat the two rods from the same initial temperature to the same final temperature. You observe that the short rod expands its length by an amount ΔL. The amount by which the length of the long rod will expand must be ___.
a. 2 ΔL
b. (3/2) ΔL
c. 3 ΔL
d. ΔL
c. 3 ΔL
A Carnot heat pump uses thermal reservoirs at -27°C and 57°C. How much power does this pump consume to produce a 100 kW heating effect?
a. 9.1 kW
b. 12.7 kW
c. 15.3 kW
d. 20.7 kW
c. 15.3 kW
Which one of the following substances should you rub to the sting of a bee to neutralize it?
a. Baking soda
b. Water
c. Vinegar
d. Lemon juice
a. Baking soda
Which of the following best define Metamorphism?
a. compaction and cementation of rock fragments
b. precipitation of minerals dissolved in water
c. solidification of magma by cooling
d. changing of a rock by heat and pressure
d. changing of a rock by heat and pressure
Why can we not focus clearly under water yet swimming goggles will restore clear focus?
a. Because swimming goggles have an air/cornea interface so the eyes focus normally.
b. Because swimming goggles have corrective lenses to adjust the refracted rays.
c. Because swimming goggles have special film coating on the lenses.
d. Because swimming goggles has lenses designed for underwater used.
a. Because swimming goggles have an air/cornea interface so the eyes focus normally.
Marble is a metamorphic rock, which is a rock that has been physically and chemically transformed over time due to intense heat and pressure. What is the parent rock of marble?
Limestone
You found out that the 350 grams of quartz in the laboratory has a density of 2.7 g/ cm3. What is the volume of your quartz sample?
129.6 cm3
What is the correct sequence of increasing levels of organization?
Cell, tissue, organ, organ system
On a cold day, you take in 4.2 L of air into your lungs at a temperature of 0eC. If you hold your breath until the temperature of the air in your lungs reaches 370C, what is the volume of the air in your lungs at that point, assuming the pressure does not change?
4.8 L
How much power is necessary to do 50 J of work in 5 seconds?
10 watts
What is the balanced net ionic equation for the reaction of CaCl2 and AgNO3?
2Cl- + 2Ag+ → 2AgCL(s)
If the reaction shown is a single replacement, what will the reaction be when it is balanced? Ba + HCl →?
Ba + 2 HCl → H2 + BaCl2
A concave mirror with a focal length of 10.0 cm creates a real image 30.0 cm away on its principal axis; the corresponding object is located how far from the mirror?
15.0 cm
Halley’s comet completes one revolution around the sun in:
76 years
Phobos and Deimos are the natural satellites of which planet?
Mars