Vocabulary
What is a mixture?
A combination of two or more substances or materials.
Scientists use different methods of ______ while investigating materials.
observation
matter
Particles in a gas are very _____.
loose
A _________ is an item or condition that can be changed or controlled in an investigation.
Name three examples of types of methods of observations that scientists use.
i.e. feel, smell, touch, sight, measure, weight
Matter is made up of small particles called ______.
atoms
When a chemical reaction takes place ______ will not be loss.
mass
What is a chemical reaction?
When two or more substances are combined and a NEW substance is produced with new and different properties.
The characteristics of a material are its ________.
properties
The three states of matter are a _____, _______, and _____.
solid, liquid, gas
When making clay, adding more water would make the clay ______, while adding flour would make the clay less _______.
runny, sticky
What is a fair test?
Changing only one thing at a time in an experiment keeps it fair with accurate test results.
i.e. opaque, waterproof, texture, magnetic, electrical conductivity, thermal conductivity
Particles in a ______ are bound closely together to hold their shape.
What are the two types of reactions a substance can have?
chemical and physical reaction
Why is it important to have fair tests in an experiment?
If more than one thing is changed, we would not be able to tell which thing caused the results.
What three tests were used to discover our mystery properties in our evidence bags?
Magnetic, electrical conductivity, and thermal conductivity
Particles in a liquid and gas both move ______.
freely
Name three ways we can determine if a new substance is created by a mixture.
i.e. bubbling, color change, temperature change, state change, etc.