A is any substance found naturally occurring on Earth. natural resources
synthetic
polymerized
man made

Which of the following is not among the root causes of poverty in the united states? size of family disabilities advanced degrees underemployment

Describe at least three effects of the drug war in mexico.

Nami conducts an investigation on plants. she places a grow light on a timer to give the plants different amounts of light to see if this would affect their growth. in this investigation, the amount of light is the .