2005 SOL Released 31-40

In a food chain, the numbers of each type of population are usually in a relatively stable combination. A diagram of a food chain is shown above. If humans interfered by spraying an insecticide to kill the insects, what would be the next thing that would happen?

• The number of hawks would increase
• The number of songbirds would decrease
• the number of snakes would increase
• the number of grass plants would decrease

Which of the following causes the Sun to appear to set?

• The revolution of the Sun
• The rotation of the Earth
• The revolution of the Earth
• The rotation of the Sun

An electric light bulb is hot to touch because--

• current passing through it produces heat
• its magnetic field produces a large amount of heat
• evaporation causes an object to heat up
• its chemical reachtions produce heat

Organisms that absorb nutrients from dead plants and animals are called

• Carnivores
• Decomposers
• Herbivores
• Producers

Which instrument would most accurately and precisely determine the mass of a toy car?

• An electronic light meter
• A spring scale
• A triple-beam balance
• A graduated cylinder

The diagram below shows a block from the periodic table.  The number six represents the ---

• atomic mass of the element Carbon
• atomic number of the element Carbon
• number of newtrons in the element of Carbon
• number of valence electrons in the element Carbon

 Each student in a science class of 25 conducts the same experiment. One student gathers all the data from her classmates and summarizes the results of the experiment for the class. She compares the data she personally recorded with the class data. Which of these might indicate to her that her results are valid?

• Three other classes performed the same experiment.
• The same experiment was repeated two years in a row.
• Many other students recorded data similar to hers
• Another student in her class reached a different conclusion.

Thrips are tiny insects that can easily be seen on roses. The thrip population changes shown in the graph above are probably caused by -

• increases in human population
• a major climatic change
• seasonal changes
• increased use of insecticides

A mixture of iron filings and sulfur can easily be separated by--

• placing the mixture in water
• performing a chemical reaction
• heating the mixture
• using a magnet

A student designs and builds a 1:1000 scale model of the Mt. Fuji volcano in Japan. Since Mt. Fuji is about 3,800 m high, what is the height of his scale model?

• 0.38 m
• 3.8 m
• 380 m
• 3,800