In testing the braking distance of certain tires on a car scientists used the same car, the same road, the same number of times braking, the same driver, etc. These things are known as the ______.

When you write a hypothesis you must make sure it is _____.

The seven foot man was the first to cross the finish line in the 50 mile race. This is an example of a(n) ______________ observation.

Patrick believes that fish that eat food exposed to microwaves will become smarter and would be able to swim through a maze faster. He decides to perform an experiment by placing fish food in a microwave for 20 seconds. He has the fish swim through a maze and records the time it takes for each one to make it to the end. He feeds the special food to 10 fish and gives regular food to 10 others. After 1 week, he has the fish swim through the maze again and record the times for each. What is his independent variable?

The 60 foot pine tree put an 8 foot hole in the house when it fell on the house. This is an __________observation.

Scientists try to develop an explanation for what they see happening in the natural world. What must be TRUE of any explanation they develop?

Patrick believes that fish that eat food exposed to microwaves will become smarter and would be able to swim through a maze faster. He decides to perform an experiment by placing fish food in a microwave for 20 seconds. He has the fish swim through a maze and records the time it takes for each one to make it to the end. He feeds the special food to 10 fish and gives regular food to 10 others. After 1 week, he has the fish swim through the maze again and record the times for each. What is his dependent variable?

Mr. Krabbs has created a new sauce that he thinks will reduce the production of body gas associated with eating crabby patties from the Krusty Krab. He tests 100 customers by having 50 (Group A) eat patties with the new sauce. The other 50 (Group B) eat patties with a fake "sauce". Neither group knows who has the real sauce. Two hours later 30 customers in group A reported having fewer gas problems and 8 customers in group B reported having fewer gas problems. What is the independent variable?

Scientists conduct many different types of investigations. Experimentation and field research are two. Which one, of these two, uses observation as its primary method of investigation?

Mr. Krabbs has created a new sauce that he thinks will reduce the production of body gas associated with eating crabby patties from the Krusty Krab. He tests 100 customers by having 50 (Group A) eat patties with the new sauce. The other 50 (Group B) eat patties with a fake "sauce". Neither group knows who has the real sauce. Two hours later 30 customers in group A reported having fewer gas problems and 8 customers in group B reported having fewer gas problems. Which is the dependent variable?