Litmus paper strips were dipped in two different unknown liquids. The table below shows the pH of the two liquids: Litmus Test for Unknown Liquids
Litmus Paper Strip pH of Liquid
X 5
Y 13

What will happen to the litmus strips?
Both will turn red
Both will turn blue
X will turn red and Y will turn blue
X will turn blue and Y will turn red

Mr. mann's science students were experimenting with speed. they set up a 1 meter (100 cm) track. the students used balls instead of cars. the balls were different sizes and made of different materials. four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. some of their data are shown in the table. which ball will take the longest to complete one lap around the track?

The principle that the geoglical processes that we see today have occurred through out earths history is called

The american public was excited by the invention of the railroad system. true false