Physical Science Unit 1 Test Review

The application of knowledge to solve practical problems is known as

• science

• technology

• curiosity

• experimentation

Which of the following is NOT a branch of natural science?

• Physical Science

• Life Science

• Earth Science

• Social Science

What is the purpose of an experiment?

• To communicate data

• To test a hypothesis

• Prove a scientific law

• None of the above

How does the scientific process begin?

• Experimentation

• Technology

• Curiosity

• Discovery

Which of the following branches of natural science includes chemistry and physics?

• Earth Science

• Space Science

• Life Science

• Physical Science

Which of the following is the study of the origin, history and structure of Earth?

• Astronomy

• Geology

• Biology

• Chemistry

The first step of the scientific method is...

• making a hypothesis

• Making a conclusion

• Formulating Data

• Observation

In an experiment, the variable which is purposely changed is called the...

• Controlled variable

• Independent variable

• Dependent variable

• None of the options

Ella believes that her hair will be softer by more brushing. To test this, she begins by brushing her hair for 10 minutes. Each day she increases the time she brushes her hair by 10 minutes. She does this for 7 days, while using the same brush each time. After each day, she observes the softness of her hair.

What is the independent variable in this experiment?

• The amount of time spent brushing

• The type of brush used

• The softness of the hair

• The number of days

Ella believes that her hair will be softer by more brushing. To test this, she begins by brushing her hair for 10 minutes. Each day she increases the time she brushes her hair by 10 minutes. She does this for 7 days, while using the same brush each time. After each day, she observes the softness of her hair.

What is the dependent variable in this experiment?

• The amount of time brushing

• The type of brush used

• The softness of the hair

• The number of days