2. Brittany wanted to find out which wheels were best for her skateboard. She purchased 4 sets of new wheels of different brands. She and a friend set up a course on her driveway. Brittany rode through

the course 5 times on each set of wheels. Her friend timed her with a stopwatch and recorded the

times. They averaged the times for each brand of wheels.

a. Independent Variable

b. Dependent Variable -

c. Experimental Group -

d. Control Group -

e. Constants -

a. Independent Variable- wheels of different brands

b. Dependent Variable - TIME

c. Experimental Group - the skateboards that received the four different brands of wheels

d. Control Group - the skateboard that did not receive any of the new brands of wheels

e. Constants - Same number of times for each wheel, same stop watch used

Explanation:

a) independent variable in an experiment is the variable that is manipulated or changed in the experiment. In this case, the independent variable is the wheels of different brands

b) Dependent variable is the variable that is measured in an experiment. In this case, the TIME is measured, hence, it is the dependent variable.

c) The experimental group is the group that receives the experimental treatment. In this case, the skateboards that received the four different brands of wheels are the experimental group.

d) The control is the group that does not receive the experimental treatment. In this case, the skateboard that did not receive any of the new brands of wheels is the CONTROL.

e) Constants or controlled variable is the variable that remains unchanged for all groups throughout the experiment. The constant in this experiment are the Same number of times for each wheel, same stop watch used

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus