INTRODUCTION TO CHEMISTRY
What is the study of matter and its changes called?
Chemistry
What is the first step scientists typically take when investigating a question?
Observation
What variable is intentionally changed by the scientist?
Independent variable
What SI unit is used for time?
Second
Which state of matter has a definite shape and volume?
Solid
Anything that has mass and takes up space is called what?
is called what?Matter
What is a testable explanation for an observation?
Hypothesis
A student changes the temperature of water and measures how quickly sugar dissolves. What is the independent variable?
Temperature
What SI unit is used for temperature?
Kelvin
Which state has neither a definite shape nor volume?
Gas
What is the smallest unit of an element that retains its properties?
Atom
What is the final statement made after analyzing experimental results?
Conclusion
Why are constants important in an experiment?
Fair test
What SI unit is used for mass?
Kilogram
Iron rusting is a physical or chemical change?
Chemical change
What do we call matter that has a definite composition and specific properties?
Substance
Why should an experiment be repeated?
Reliability
A scientist tests three different fertilizers while keeping the amount of water the same. What is the amount of water?
Constant
What metric prefix means 1/1,000?
Milli-
Which piece of glassware is generally more accurate for measuring liquid volume: a beaker or graduated cylinder?
Graduated cylinder
A substance made of two or more different elements chemically combined is called what?
Compound
A scientist predicts that increasing temperature will increase reaction rate. This prediction is a what?
Hypothesis
A student tests whether the amount of light affects plant height. What is the dependent variable?
Plant height
What metric prefix means 1,000 times the base unit?
Kilo-
An object has a density of 2 g/mL and a volume of 10 mL. What is its mass?
20 g