Mrs. Grayson asked her class to bring one object from home to complete the electric circuit that they built in class. Some of the items that students brought are listed below. • paper clip string fishing line • pencil • penny The only things that made the circuit's light bulb light were the paper clip-and the penny. Why is that?

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c