Unit 1 Review Game

What is the first step of the scientific method?

What is the goal of the scientific method?

In a controlled experiment, what is the only variable that should change?

• Dependent Variable (responding variable)

• Independent Variable (manipulated variable)

• Control Group

• Experimental Group

What is a control group in an experiment?

• A group that receives no treatment.

• A group that receives treatment.

What are the two types of variables in an experiment called?

• Independent variable (manipulated) and Control Variable

• Dependent variable and the Experimental Group

• Experimental Group and Control Group

• Manipulated (Independent) and responding (Dependent)

What is the manipulated variable in this study?

You want to test if insect repellants will actually keep away mosquitoes. You spray insect repellent on 3 people and no insect repellant on 3 other people. You count the number of mosquito bites they each receive.

• Insect repellent

• Number of mosquito bites received

• There isn't a manipulated variable

• 3 people

What is the responding variable in this experiment?

Several orchids are given plant food. Several other orchids (of the same type) are not given plant food. The scientist counts the number of blooms on each flower spike to determine if plant food increased the number of blooms per spike.

• Orchids

• Number of blooms per spike

• Plant food

• Responding variable?

What is the responding variable in this study?

There is a hypothesis that children who are raised with animals and are exposed to germs have stronger immune systems than children who are raised in super clean homes with no animals.  A doctor examines the medical records of 100 12-year-olds who were raised with pets and 100 12-year-olds who were raised with no pets.  She counts the number of times that each child has been diagnosed with an infection.

• Children

• Animals

• Number of infections

• Responding variable?

What is the manipulated variable in this experiment?

Your local dog groomer tells you that dogs who get groomed regularly get fewer fleas and ticks.  You decide to test this on your own 4 dogs (You have a German Shepherd, a Chihuahua, a Pomeranian, and a mutt, in case you forgot.)  You get two of your dogs groomed every 2 weeks and let the other 2 dogs get completely stinky and un-groomed.  After 3 months, you examine the dogs for the presence of fleas and ticks.

• Dog Groomer

• Fleas

• The grooming/no grooming

• Manipulated variable?

What type of graph is this?

• Bar

• Line

• Scatter plot

• Histogram