25/26 6A Unit 4 Lesson 2-3

Which resource can be used up, but is considered renewable because it can replace itself?

• geothermal

• trees

• copper

• wind

Answer explanation

Trees are considered a renewable resource because they can grow back after being cut down, unlike non-renewable resources like copper. This ability to regenerate makes trees a sustainable choice for resource use.

Tags

NGSS.MS-LS2-5

Which question can a student ask to determine whether a resource is renewable or nonrenewable?

• Is the resource available naturally?

• Is there a practical use for the resource?

• Is the collection of the resource damaging to the enviroment?

• Is the resource unlimited or able to be replaced within a reasonable time?

Answer explanation

The correct question is about whether the resource is unlimited or can be replaced in a reasonable time. Renewable resources can regenerate quickly, while nonrenewable resources cannot, making this the key distinction.

Which energy resource is nonrenewable?

• coal

• biomass

• water

• wind

Answer explanation

Coal is a nonrenewable energy resource because it forms over millions of years from decomposed plants and cannot be replenished on a human timescale. In contrast, biomass, water, and wind are renewable resources.

Which statement provides evidence that petroleum is a nonrenewable resource?

• Petroleum harms the environment when it is used.

• It takes millions of years for petroleum to form.

• Many products are made from petroleum.

• Petroleum is a source of energy.

Answer explanation

The correct choice, 'It takes millions of years for petroleum to form,' indicates that petroleum is formed over an extensive geological time period, making it nonrenewable as it cannot be replenished within a human timescale.

Why is copper considered to be a very valuable natural resource?

• Copper is the only mineral that can be classified as an ore

• Copper fuels nuclear power plants around the United States

• Copper can be melted down to use in steel production

• Copper conducts electricity well so it can be used for wiring

Answer explanation

Copper is highly valuable because it conducts electricity well, making it essential for wiring in electrical systems. This property is crucial for power distribution and electronic devices, enhancing its demand and value.

If you have an unknown material that conducts electricity and heat well, what kind of substance would it be?

• • 
    

    It could be a metal or a nonmetal.

• It must be a metalloid.

• It must be a metal.

• It must be a nonmetal.

Answer explanation

Metals are known for their excellent conductivity of electricity and heat. Nonmetals typically do not conduct well, and metalloids have mixed properties. Therefore, the unknown material must be a metal.

Tags

NGSS.MS-PS3-3

If you have an unknown material that is a brittle solid and semiconductive, what kind of substance would it be?

• It must be a nonmetal.

• It must be a metalloid.

• It could be a metal.

• It could be a nonmetal or a metalloid.

Answer explanation

The material is described as brittle and semiconductive, which are characteristic properties of metalloids. Nonmetals are typically not semiconductive, and metals are usually not brittle. Therefore, it must be a metalloid.

Tags

NGSS.MS-PS1-1

What does it mean for a substance to have luster?

• It is shiny.

• It conducts heat.

• It conducts electricity.

• It can be bent into different shapes.

Answer explanation

Luster refers to the way a substance reflects light, making it appear shiny. This characteristic is commonly seen in metals and some minerals, distinguishing them from dull materials.

Which fuel creates the most air pollution when burned?

• electricity

• natural gas

• clean fuels

• coal

Answer explanation

Coal creates the most air pollution when burned due to its high sulfur and carbon content, leading to significant emissions of sulfur dioxide, nitrogen oxides, and particulate matter compared to other fuels.

Tags

NGSS.MS-ESS3-4