Pretest Book K Unit 1

What do scientists use to represent objects or processes that cannot be directly observed?

• model

• theory

• law

• hypothesis

A possible explanation or answer to a question is...

• hypothesis

• scientific method

• data

• first aid

A series of steps used to answer questions and solve problems is called the...

• hypothesis

• scientific method

• data

• first aid

Why should you study science?

• I have no choice.

• To learn about the world around me.

• What is science?

• I never study.

Scientists use _______ to represent natural systems because these systems are often too large, too small, or too complex to study.

• systems

• models

• measurements

• balances

What is science?

• knowledge obtained by observing natural events

• a system of ideas that explains many related observations

• a descriptive statement or equation

What is a theory?

• educated guess

• possible explanation

• a system of ideas that explains many related observations

• a representation of an object or event

Technology is:

• handheld device

• a representation of an object

• descriptive statement or equation

• application of science for practical purposes

Physics is

• forces, motion and energy

• matter and its changes

• matter and energy

• living things

What is the definition for Controlled Experiment ?

• Information acquired by observation or experimentation.
• A unit of measure of distance (m)
• An experiment in which only one variable is manipulated at a time.
  
• Always applies under the same conditions (Ex. The Law of Gravity)