Unit 1 Review

Which of the following steps to solve a problem must be completed first?

• Analyzing data

• Recognizing and identifying the problem

• Forming a hypothesis

• Testing a hypothesis

A prediction or statement that can be tested is a(n)

• Conclusion

• Observation

• Control

• Hypothesis

A factor in an experiment that can change is a(n)

• observation

• variable

• control

• hypothesis

One tool that can be used to display your data is a

• balance

• spring scale

• microsope

• computer

A good way to organize and record your results and observations is

• in a data table

• by using a calculator

• with a balance or spring scale

• by having a hypothesis before you begin your experiment

What skill are you using when you use your five senses to gather information?

• Posing questions

• Observing

• Developing hypotheses

• Designing experiments

Facts, figures, and other evidence learned through observation are called

• variables

• experiments

• questions

• data

What characteristic must be true of a good hypothesis?

• It must be correct

• It must have been observed many times

• It must involve quantitative data

• It must be testable by observation or experiment

In a controlled experiment, a scientist is studying how long it takes parachutes of different sizes to fall to the ground. What is the manipulated variable?

• The size of the parachute

• the height from which the parachute is dropped

• the size of the object carried by the parachute

• The time it takes for the parachute to drop

Which sentence best describes a scientific theory?

• It can never change

• It can change every time it is tested

• It can be proven conclusively

• It is well tested and explains a wide range of observations