Wednesday
October 1, 2014

Homework Help: Science

Posted by Anonymous on Thursday, May 29, 2014 at 7:21pm.

1. How does a nuclear power plant produce energy?
A. Through solar panels
B. Through nuclear fission reactions
C. Through geothermal heat
D. Through nuclear meltdown reactions<------------

2. How can human population growth affect ecosystems like rain forests?
A. Human population growth causes a decrease in the use of resources from rain forests
B. Human population growth causes an increase in the biodiversity of rain forests
C. Human population growth causes an increase in the use of resources from rain<--------
D. Human population growth creates new rain forest species

3. Sea otters are part of a giant kelp ecosystem. They feed on sea urchins that feed on kelp. How does hunting sea otters affect the population of sea urchins and kelp in the ecosystem?
A. The sea urchin population decreases, and the kelp population increases
B. The sea urchin population decreases, and the kelp population decreases
C. The sea urchin population increases, and the kelp population decreases<----------
D. The sea urchin population increases, and the kelp population increases

4. Which of the following is a problem with using solar power as a main source of energy?
A. People do not yet have the technology to use solar power
B. the sun is not close enough to provide energy
C. Power from solar energy contains a large amount of harmful ultraviolet rays<--------
D. solar power is not available at night or when it is cloudy

5. How can using biomass fuel instead of gasoline in car engines help conserve natural resources?
A. It burns more fossil fuels<--------
B. It reduces the use of coal
C. It uses a renewable resource
D. It makes cars run faster

6. Which of the following describes the use of a renewable form of energy?
A. Using natural gas to heat a house
B. Using a windmill to grind grain
C. Using petroleum to run a car
D. Using coal to generate electricity

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