What did North America look like during the last ice age? Check all that apply.
A. Much of what is today the northern United States was ice
covered
B. Florida was covered with sand dunes.
C. The southwest consisted of dry, open prairie.
D. The whole continent was covered with thick ice.

Renaldo and nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. when they test the electromagnet, it can pick up 6 paper clips. their teacher wants all groups to pick up at least 10 paper clips. what could renaldo and nasreen do to increase the number of paper clips their electromagnet picks up?