Why do some minerals have to undergo smelting?(1 point)
Responses
to break rock down into usable sand
to break rock down into usable sand
to melt down ores and extract metals
to melt down ores and extract metals
to reduce their toxicity
to reduce their toxicity
to process them into usable mineral fuels
to melt down ores and extract metals
Question
Which figure most closely represents the average amount of nonfuel minerals consumed annually by each U.S. citizen?(1 point)
Responses
41,000 pounds
41,000 pounds
400 pounds
400 pounds
11,000 pounds
11,000 pounds
100 pounds
11,000 pounds
Heera decides to start a project that will help reduce the need for mining by conserving minerals. Which of these projects is most likely to help her achieve her goal?(1 point)
Responses
recycling aluminum cans
recycling aluminum cans
cleaning up a local park
cleaning up a local park
planting trees in your community
planting trees in your community
removing single-use plastic bags from your school
recycling aluminum cans
Your friend suggests that we can help conserve minerals by using less water when we wash dishes and clothes. Choose the answer that correctly responds to your friend’s idea.(1 point)
Responses
Using less water helps our planet, and that means it will help conserve minerals.
Using less water helps our planet, and that means it will help conserve minerals.
Using less water won’t conserve minerals because minerals are metals.
Using less water won’t conserve minerals because minerals are metals.
Using less water will help conserve minerals because most minerals are liquids.
Using less water will help conserve minerals because most minerals are liquids.
Using less water won’t conserve minerals because minerals are solids.
Using less water won’t conserve minerals because minerals are solids.
Using less water helps our planet, and that means it will help conserve minerals.
Why are coal and petroleum called fossil fuels?(1 point)
Responses
They formed from decaying ancient plants and animals.
They formed from decaying ancient plants and animals.
They formed from extinct organisms.
They formed from extinct organisms.
They provide energy for fossils.
They provide energy for fossils.
They were originally imprinted in rock that later decayed.
They formed from decaying ancient plants and animals.
The carrying capacity for many animal populations has decreased, but the carrying capacity for Earth’s human population has increased. What might be a reason for the increasing carrying capacity for humans?(1 point)
Responses
Humans live longer than many other animals do.
Humans live longer than many other animals do.
Humans can change their environment by developing technology to control environmental factors that might limit growth.
Humans can change their environment by developing technology to control environmental factors that might limit growth.
Humans reproduce faster than most animals do.
Humans reproduce faster than most animals do.
Humans are more likely than other animals to move out of an area that has limited resources.
Humans are more likely than other animals to move out of an area that has limited resources.