Vocabulary
What is a mixture?
A combination of two or more substances or materials.
Scientists use these "tools" to make observations for every experiment/investigation.
senses
matter
Particles in a gas are very _____.
loose, far apart, spaced out
A _________ is something that can affect the outcome of an experiment.
variable
Name two properties of grass.
Examples include:
green
soft
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
At the end of an investigation, you can look at all the data to help you draw a _________________.
Conclusion
To test a material to see if it has the property of being magnetic, you could __________________.
See if a magnet sticks to it.
Particles in a ______ are bound closely together to hold their shape.
Before a chemical change, the mass of two materials totals 12 grams.
After mixing the two materials, a chemical reaction takes place, and a new material is formed.
What would happen to the mass after the chemical change?
a. It would stay the same, 12 grams.
b. It would increase.
c. It would decrease.
A
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.
Some materials have the property of thermal conductivity. This means they
a. are magnetic
b. conduct electricity
c. conduct heat
c
Particles in a __________ or ____________ take the shape of their container.
gas or liquid
Name three ways we can determine if a chemical reaction has taken place.
bubbling, color change, temperature change, state change, gives off light, something new is formed