Vocabulary
Anything that has mass and takes up space.
What is MATTER?
A melted popsicle is an example of a this kind of change.
What is a physical change? You can melt and refreeze a popsicle and it will still be a popsicle.
Rust an example of this kind of change.
What is a CHEMICAL change? You cannot change rust back into the metal is was before; therefore, it is a chemical change.
The amount of mass you have in a certain volume.
What is DENSITY?
The type of change you have with mixtures.
What are PHYSICAL CHANGES?
These are the characteristics of an object and you use your senses to identify them-like size and shape.
What are PHYSICAL PROPERTIES?
When you combine baking soda and vinegar you get this kind of change.
What is a CHEMICAL change? Bubbles form, which indicates a chemical change as taken place.
Name two signs of a chemical change.
What are color change, bubbles, temperature change?
The 3 phases of matter.
What are SOLID, LIQUID, GAS?
The liquid that dissolves a solid.
What is a solvent?
Type of change where a new substance is created.
What is a CHEMICAL CHANGE?
Name of a food that is an example of a heterogeneous mixture.
What is a salad or trail mix?
Name a food that is an example of a chemical change and explain why.
What is a cake, because you cannot turn a cake back into the eggs, flour, sugar, etc. that you mixed together?
These molecules can move pretty freely and will take the shape of any container you put them in. They are still somewhat stuck to each other.
What is a LIQUID?
When you combine two or more metals together into a homogenous mixture.
What is an ALLOY?
A type of change where the substance stays the same, but size and shape may change.
What is a PHYSICAL CHANGE?
Explain how water could go through a physical change.
What is freezing and melting water to and from ice is an example of a physical change?
True or False. Turning peanuts to peanut butter is an chemical change.
What is FALSE? To make peanut butter, you grind up roasted peanuts, so nothing new is being created.
These molecules bounce off of each other randomly.
What is a GAS?
Explain how iron fillings and sand can be separated using physical properties.
What is iron is magnetic and sand is not, so you can use a magnet to separate the two substances?
This state of matter keeps a definite shape.
What is a SOLID?
CHALLENGE: Explain how the water cycle is an example of a physical change.
It is a physical change because water changes to a liquid/solid when it precipitates, to a gas when it evaporates, then forms back into a liquid when it condensates. Then the process repeats again with the same substance, WATER!
CHALLENGE Explain how a rocket launch is an example of a chemical change.
What is the fuel combines with another chemcial to produce large volumes of a hot gas that propel the rocket into space?
Identify 1 example of a solid, liquid, and gas.
What is Solid- desk, book; Liquid- water, lemonade; Gas- helium, air?
CHALLENGE Is a solution homogeneous or heterogeneous?
What is HOMOGENEOUS?