Scientific Method
This is the variable that the experimenter deliberately changes or manipulates in an experiment.
What is the independent variable?
This type of property describes how a substance looks or behaves without changing its chemical identity, like color or melting point.
What is a physical property?
This state of matter has both a definite shape and a definite volume.
What is a solid?
This technique works best for separating an insoluble solid from a liquid, like sand from water.
What is filtration?
This variable is measured or observed during an experiment to see how it responds to changes.
What is the dependent variable?
This type of property describes how a substance interacts with other substances, such as its ability to react with acid.
What is a chemical property?
This is the simplest form of matter that cannot be broken down into simpler substances by chemical means.
What is an element?
You would use this separation method to recover a solid that has been dissolved in a liquid, such as getting salt back from salt water.
What is distillation (or evaporation)?
These are the factors kept the same throughout an experiment to ensure fair and accurate results.
What are controlled variables (or constants)?
When ice melts into water or salt dissolves in tea, this type of change has occurred because no new substances are formed.
What is a physical change?
This type of pure substance is made of two or more elements chemically bonded together, like water or table salt.
What is a compound?
This describes the key difference between pure substances and mixtures in terms of composition.
What is that pure substances contain only one type of substance while mixtures contain two or more substances?
This describes what a scientific law does, as opposed to a theory which explains why phenomena occur.
What is describing a consistent observation or pattern in nature?
When wood burns or iron rusts, this type of change occurs because new substances with different properties are created.
What is a chemical change?
This type of mixture has components that are not evenly distributed and can be visibly distinguished, like a salad or sand in water.
What is a heterogeneous mixture?
This type of matter can be separated into simpler substances using physical means like filtering or evaporating.
What is a mixture?
These are the basic steps you would follow to solve a problem scientifically, starting with observation and ending with a conclusion.
What is the scientific method (or what are: observation, hypothesis, experiment, analysis, and conclusion)?
The formation of bubbles (gas), color changes, temperature changes, or the production of light are all clues that this type of change is happening.
What is a chemical change?
This type of mixture has a uniform composition throughout, with components evenly distributed, like air or salt water.
What is a homogeneous mixture (or solution)?
The number of different types of elements you would count in the formula for table sugar, C₁₂H₂₂O₁₁.
What is three (carbon, hydrogen, and oxygen)?