WorksheetsWeek #31 'Schoolnet'
Total questions: 20
Worksheet time: 10mins
Rainbow trout are found in mountain streams and are sensitive to changes in their habitat. Which would be the best description for the use of rainbow trout in water quality testing?
biological indicator
invasive species
an apex predator
Which is an area of land that all drains to one place?
river
aquifer
reservoir
watershed
The local middle school has a fish pond in the courtyard. The pond water is suffering from eutrophication. Which most likely caused this problem?
fertilizer runoff
improper cleaning
direct sunlight
poor filtration
Which is the best way to conserve water?
Take a daily bath rather than a shower.
Wash several small loads of clothing rather than a few large ones.
Use the dishwasher only for small loads rather than for large loads.
Install low-flow toilets that reduce the amount of water being flushed.
Which type of water reservoir always provides fresh water?
mountain glaciers
tropical seas
estuaries
inland lakes
What is the role of photosynthesis in the carbon cycle?
It adds carbon dioxide to water.
It removes carbon dioxide from plants.
It adds carbon dioxide to the atmosphere.
It removes carbon dioxide from the atmosphere.
Which molecule is necessary in order for respiration to occur in plants and animals?
nitrogen
oxygen
sulfur
carbon dioxide
Which diagram best illustrates the correct flow of energy in an ecosystem?
Which best determines the number of wolves that can live in an area?
the amount of snow in the area each year
the number of birds that live in the area
the number of trees in the area
the amount of food available in the area
The use of which energy source causes the most damage to the environment?
fossil fuels
biomass
wind
A family installs a new heating system in their home. Which is the most desirable result of the new heating system?
producing more noise pollution
decreasing the amount of energy used
increasing the use of natural resources
increasing the time it takes to heat the home
Water (H2O) and table salt (NaCl) can be combined to form salt water. How can this combination be classified?
as a compound because the water (H2O) and table salt (NaCl) are chemically combined
as a compound because the water (H2O) and table salt (NaCl) form a new pure substance
as a mixture because the water (H2O) can be evaporated and physically separated from the table salt (NaCl)
How many elements are in the compound sulfuric acid, H2SO4?
1
2
3
4
Two colorless liquids are added to a test tube. A moment later, a white solid is observed in the bottom of the test tube. What is the best conclusion that can be drawn from this observation?
A chemical change occurred.
The liquids changed phase.
A physical change occurred.
Using a closed system, a student heats 100 milliliters (mL) of distilled water in a flask. The steam from the water is captured, cooled, and condensed as shown in the diagram.
How much water is most likely collected?
1 mL
10 mL
100 mL
1000 mL
Which molecule, found in food, supplies the energy needed by organisms to perform life functions?
salt
fiber
sugar
water
Which molecule provided by plants accounts for the energy in a herbivore’s diet?
glucose
protein
fats
salt
Why do doctors suggest that people get a flu vaccine each year?
Viruses replicate more rapidly over time.
Viruses can mutate from year to year.
Vaccines are absorbed by the body after a year.
Vaccines get stronger over time.
How are viruses different from most other microbes?
They are nonliving.
They can cause disease.
They contain genetic material.
They are only seen with a microscope.
Antibiotics would be least useful against which type of disease-causing organism?
bacteria
fungus
parasite
virus
