Final answer:
Federal grants have increased and been used for various purposes, but they are not given by the states for national projects.
Step-by-step explanation:
Federal grants have increased significantly during the 20th Century, have been used for education, pollution control, and highway construction, and quadrupled in dollar amount in the 1960's. However, federal grants are not given by the states for national projects. The national government provides grants to influence state and local activities in various policy areas, but they are not given by the states.