Matter & Mixtures
This state of matter has a definite shape and a definite volume
Solid
This form of energy allows us to see the world around us
Light Energy
This is the force that pulls all objects toward the center of the Earth
Gravity
When ice melts into water, it is an example of this type of change (Physical or Chemical?)
Physical Change
This is using your five senses (sight, smell, touch, etc.) to gather information about the world.
Observation
If you have a mixture of sand and iron filings, this tool is the best way to separate them
Magnet
This word describes a material, like copper wire, that allows electricity to flow through it easily
If two teams play tug-of-war and the rope does not move, the forces are described as this.
Balanced
If you put a balloon over a bottle and place the bottle in hot water, the balloon inflates because the gas does this.
Expands
In an experiment, this is the name for the ONE variable that the scientist changes on purpose.
Independent / Test Variable
This term describes a mixture where one substance dissolves evenly into another, like sugar in water
Solution
For a lightbulb to turn on, the electrical circuit must be this (Open or Closed?)
Closed
To move a box with more mass, you need to apply more of this.
Force
We put milk in the refrigerator because cold temperatures do this to the chemical change that makes milk spoil.
Slow it down
This is the reason scientists do multiple trials (repetition) of the same experiment.
Accuracy / To make sure results are reliable
To separate a mixture of sand and water, you would use this process (or tool) to let the liquid pass through while catching the solid
Filtration / A Filter or Sieve
When you plug in a toaster, electrical energy transforms into these two forms of energy
Heat and Light
This invisible force works against motion when two surfaces rub against each other (like sliding a book on a carpet).
Friction
Breaking a glow stick causes a chemical reaction. Putting that glow stick in hot water makes the glow brighter because the particles are moving ________.
Faster
Unlike a general investigation, a true Experiment must always involve identifying and controlling these.
Variables
To make a solid dissolve faster in a liquid, you can do these three things: stir it, crush it, or do this
Heat it up / Increase temperature
Rubbing a balloon on your hair creates this type of electricity, where charged objects attract or repel each other.
Static Electricity
An object in motion will stay in motion unless acted upon by this type of force.
Unbalanced Force / Opposing Force
This is the main difference between melting butter and burning toast.
Melting is Physical/Reversible; Burning is Chemical/Irreversible
This is the group in an experiment that does not get the special treatment, used for comparison.
Control Group