Step 1: Roll a wooden ball down a 3-meter long ramp. Step 2: With a partner, measure the time it took for the ball to reach the bottom of the
ramp.
Step 3: Roll the ball 5 more times from the starting point of the ramp.
Step 4: Find the average time it took for the ball to reach the bottom.
Step 5: Trade procedures with another group and conduct the first 4 steps.
Which step of the procedure indicates replication?
O Step 1
O Step 3
Step 4
Step 5

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.