4th Grade Science : Earth and Space Science
Study concepts, example questions & explanations for 4th Grade Science
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Example Questions
Example Question #1 : Describe How Energy And Fuel Are Created
Iron ore is a resource that is found in many places around the world. Why is iron ore a nonrenewable resource?
Mining iron ore causes pollution and damage to the environment.
Most iron ore has yet to be discovered.
Iron ore is difficult to recycle.
Forming new iron ore is an extremely long process.
Forming new iron ore is an extremely long process.
Iron ore is a nonrenewable resource because it is challenging to replenish due to the amount of time it takes to form. Most of the iron ore that is currently deep within Earth's rocks is 1.8 billion years old. By the time we have used all of the available iron ore, there will not be enough time to generate new materials.
Example Question #169 : 4th Grade Science
How could nonrenewable resources be replaced with renewable resources?
Heat homes with wind-generated power.
Generate power for a town with hydroelectric methods.
Use hybrid vehicles that cut down on gas usage.
All of the answer choices are correct.
Create electricity with solar panels instead of coal.
All of the answer choices are correct.
Nonrenewable resources are those found on Earth or within Earth's surface and take millions if not billions of years to form and replenish themselves, such as oil, petroleum, and coal. Renewable resources are generated by sources that cannot run out and do not need replenishing like the Sun, water, or wind. All of the answer choices provide good options for replacing nonrenewable resources with something renewable.
Example Question #113 : Earth And Space Science
Which renewable resource is replenished by evaporation, condensation, and precipitation?
Petroleum
Wind
Water
Oxygen
Water
Water is a renewable resource that is renewed by evaporation, condensation, and precipitation. These are all stages of the water cycle, which is continually replenishing the water on Earth. Water is a resource that has power when it is in motion and we can harness this to generate electricity.
Example Question #111 : Earth And Space Science
Which resource would be more plentiful to people who live in the southern United States than it would be for people who live in the northeastern parts of the United States?
Gas
Wind energy
Solar energy
Oil
Solar energy
Solar energy would be more plentiful to people in the southern US than those in the northeastern parts of the US because of the amount of sunlight each area receives. The northeast areas receive lots of rainy, snowy, dark days while the southern US has more days with sunshine.
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