Which of the following are true regarding ores? i. ores can be metallic. ii. ores can be nonmetallic. iii. ores consist of minerals. iv. materials removed from ores are useful.

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land