7th Grade Science
TAME Math and Science Contest
Answer the following questions by marking the BEST answer on the answer sheet.
1. Which of the following describes what happens when an atom becomes an ion with a 2 – charge?
a. The atom gains two protons.
c. The atom gains two electrons.
b. The atom loses two protons.
d. The atom loses two electrons.
2. Compounds that are composed of molecules are called
a. covalent compounds.
c.
b. ionic compounds.
d.
metallic compounds.
metalloidal compounds.
3. Which of the following would feel slippery?
a. an acid
b. a salt
a base
none of the above
c.
d.
4. Carbon atoms can form the backbone of organic compounds because each carbon atom
a. has 4 valence electrons.
c. can form 4 bonds.
b. can bond with 4 atoms.
d. All of the above
5. Atoms that _____ form positive ions.
a. lose electrons
b. lose protons
c.
d.
gain electrons
gain protons
6. Sound travels as a(n)
a. longitudinal wave.
b. transverse wave.
c.
d.
electromagnetic wave.
All of the above
Use the chart below to answer question 7.
Speed of Sound in
Different Media at 20°C
Medium
Speed (m/s)
Air
343
Helium
1,005
Water
1,482
Sea water
1,522
Wood (oak)
3,850
Glass
4,540
Steel
5,200
7. How far does sound travel in 2.5 seconds through oak wood at 20ºC?
a. 154 m
c. 3,875 m
b. 3,825 m
d. 9,625 m
8. As the amplitude of a wave increases,
a. the softer a sound becomes.
b. the louder a sound becomes.
c.
d.
the higher the frequency becomes.
Both (b) and (c)
9. Destructive interference occurs when
a. the rarefactions of one wave overlap the rarefactions of another wave.
b. the compressions of one wave overlap the rarefactions of another wave.
c. the compressions of one wave overlap the compressions of another wave.
d. None of the above
Released 2007
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7th Grade Science
TAME Math and Science Contest
10. ____ is the bending of waves around barriers or through openings.
a. Resonance
c. Echolocation
b. Diffraction
d. Reflection
Below is an illustration of a self-pollinating flower. Study the illustration, and answer question 11.
11. Which of the following represents an anther?
a. a
b. b
c.
d.
c
d
12. In incomplete dominance,
a. a single gene controls many traits.
b. genes for a trait are all recessive.
c. each allele for a trait has its own degree of influence.
d. the environment controls the genes.
13. That organisms produce more offspring than their environment can support and that they compete with one another to
survive are
a. elements of natural selection.
c. the only mechanisms of evolution.
b. not elements of evolution.
d. the beginning of evolution.
Use the information below to answer question 14.
The following statements contain information regarding the roach population.
A. Roaches that live to maturity may mate and produce offspring.
B. A population of roaches contain some pesticide-resistant roaches and some that are not resistant to pesticides.
C. Many roaches do not survive because they come in contact with pesticides.
D. Roaches lay many eggs.
14. Which of the above statements most closely illustrates successful reproduction?
a. A
c. C
b. B
d. D
15. Remoras and sharks have a relationship best described as
a. mutualism.
c. predator and prey.
b. commensalism.
d. parasitism.
16. ____ proposed that all atoms are small, hard particles made of a single material formed into different shapes and sizes.
a. Dalton
c. Thomson
b. Democritus
d. Rutherford
Released 2007
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7th Grade Science
TAME Math and Science Contest
17. ____ was first to propose that atoms are always moving and that they can form different materials by joining together.
a. Rutherford
c. Thomson
b. Dalton
d. Democritus
18. Neutrons are particles that
a. help make up the nucleus and have no charge.
b. help make up the nucleus and are positively charged.
c. are located outside of the nucleus and are negatively charged.
d. are located outside of the nucleus and have no charge.
19. Which of the following statements describes isotopes?
a. Isotopes are atoms of the same element.
b. Isotopes have the same number of protons but have different numbers of neutrons.
c. Isotopes have the same atomic number but have different mass numbers.
d. all of the above
Use the information below about the atom to answer question 20.
An atom of iron has 26 protons, 28 neutrons, and 26 electrons.
20. What is the mass number of this iron atom?
a. 2
b. 49
c.
d.
54
77
21. What can happen when a fluid, such as water or carbon dioxide, enters a rock that is close to its melting point?
a. The fluid can combine with the rock and dissolve it.
b. The fluid can lower the melting point of the rock enough to melt it.
c. The fluid can raise the melting point of the rock enough to melt it.
d. The fluid does not affect the melting point of the rock.
22. Which of the following clastic sedimentary rocks is the most coarse grained?
a. conglomerate
c. siltstone
b. sandstone
d. shale
23. Fossils are the remains, or traces, of plants and animals that have been preserved in ____ rock.
a. granite
c. sedimentary
b. igneous
d. metamorphic
24. Quartzite forms when ____ metamorphoses.
a. sandstone
b. calcite
c.
d.
hermatite
granite
25. The special property used to identify halite is
a. radioactivity.
b. magnetism.
c.
d.
fluorescence.
taste.
26. Which of the following is NOT a fluid?
a. water
b. ice
c.
d.
oil
oxygen
27. The deepest an undersea vessel (the Trieste) has traveled and withstood the pressure (110,000 kPa) was
a. 10 m.
c. 1,100 m.
b. 100 m.
d. 11,000 m.
Released 2007
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7th Grade Science
TAME Math and Science Contest
28. Hydraulic devices use liquids instead of gases because
a. liquids take on the shape of their containers and gases do not.
b. liquids can be compressed and gases cannot.
c. gases can be compressed and liquids cannot.
d. gases cannot exert a force but liquids can.
29. A volume of water exerts greater pressure than the same volume of air because the water
a. has more mass.
c. is more dense.
b. has more weight.
d. All of the above
30. Mountain climbers who trek to the summit of Mount Everest (8,847 m above sea level) have difficulty breathing because
a. air stops flowing from high to low pressure.
b. air stops flowing from low to high pressure.
c. there is not that much difference in pressure between the inside of their lungs and the air.
d. the difference between the pressure inside their lungs and the surrounding air is too great.
31. Astronomers often place telescopes in dry areas because these areas have
a. less atmosphere.
c. more city lights.
b. less water vapor.
d. thinner air.
Examine the illustrations of galaxies below, and answer question 32.
32. Illustration B shows a(n)
a. spiral galaxy.
b. elliptical galaxy.
Released 2007
c.
d.
irregular galaxy.
quasar.
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7th Grade Science
TAME Math and Science Contest
33. Which of the following statements supports the big bang theory?
a. All galaxies move away from each other.
b. Cosmic background radiation fills all of space.
c. Energy can turn into matter.
d. all of the above
34. Which of the following have the shortest wavelengths in the electromagnetic spectrum?
a. radio waves
c. gamma rays
b. X rays
d. microwaves
35. Which of the following is true of some nebulas?
a. Some nebulas absorb light and hide stars.
b. Some nebulas reflect starlight.
c.
d.
Some nebulas glow by themselves.
all of the above
36. The lowest possible temperature is
a. 273 K.
b. 0ºF.
c.
d.
0ºC.
0 K.
37. Alcohol in a thermometer rises as a result of
a. thermal contraction.
b. thermal expansion.
c.
d.
absolute contraction.
absolute expansion.
38. Which of the following is used to find the specific heat capacity of a substance?
a. balance
c. calorimeter
b. anemometer
d. barometer
39. You add ice to the drinks in an insulated cooler because you hope that
a. the ice and drinks will reach thermal equilibrium.
b. the drinks will transfer energy to the ice, thereby cooling the drinks.
c. the kinetic energy of the drink's molecules will be reduced.
d. All of the above
40. A tile floor feels colder on your bare feet than a wooden floor because the tile floor
a. is a better insulator.
b. has a smoother surface than a wooden floor.
c. conducts more energy from your feet.
d. will always have a lower temperature than a wooden floor.
END OF TEST
Released 2007
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7th Grade Science
TAME Math and Science Contest
Answer Key
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C
A
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D
A
A
D
B
B
B
B
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A
A
B
B
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A
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B
A
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C
B
B
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C
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D
B
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C
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