Is the statement true or false? changes in manufacturing meant that children no longer had to work.

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.

Certain gases in air are important natural resources that are used in welding. two of these gases are a. oxygen and argon b. hydrogen and fluorine c. chlorine and sulfur dioxide d. nitrogen and carbon dioxide

An area in the pacific ocean with frequent volcanic and earthquake activity is called the mid-atlantic ridge tsunami ring of fire epicenter