Vocabulary
Anything that has mass (weight) and takes up space.
What is MATTER?
Is a melted popsicle an example of a physical change?
What is YES? You can melt and refreeze a popsicle and it will still be a popsicle.
Name the 3 types of matter.
What are SOLID, LIQUID, GAS?
Is rust an example of a chemical change?
What is YES? You cannot change rust back into the metal is was before; therefore, it is a chemical change.
a characteristic of a substance that can be observed or measured without changing the identity of the substance.
What is a physical property?
These are the characteristics of an object and you use your senses to identify them.
What are PHYSICAL PROPERTIES?
a change from one state (solid or liquid or gas) to another without a change in chemical composition.
What is physical change?
True or False. If you know the weight of a portion of an object than you CANNOT determine the weight of the whole object?
What is FALSE?
a change of materials into another, new materials with different properties and one or more than one new substances are formed.
What is chemical change?
You use these to help you identify the physical properties.
What are YOUR SENSES?
Type of change where a new substance is created.
What is a CHEMICAL CHANGE?
Is Alka-Seltzer and water an example of a physical change?
What is NO? When you mix Alka-Seltzer and water, bubbles form, which indicates a chemical change as taken place.
These molecules can move freely and will take the shape of any container you put them in.
What is a LIQUID?
Name the two indicators of a chemical change.
What are color change, bubbles, and temperature change?
Name 2 physical properties of ice.
What are cold, hard, solid, wet, etc.?
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 be an example of a physical change.
What is freezing and melting water to and from ice is an example of a physical change?
These molecules move rapidly and freely whereever there is open space.
What is a GAS?
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.
Name 2 physical properties of water.
What is liquid, wet, odorless, etc.
This type of matter keeps a definite shape.
What is a SOLID?
Explain how the water cycle is an example of a physical change.
What is YES, it is a physical change, because water changes from 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.
Identify 1 example of a solid, liquid, and gas.
What is Solid- desk, book; Liquid- water, lemonade; Gas- helium, air?
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?
We can separate salt and water using physical properties. What do we call this process of evaporating the water to separate the salt?
What is DESALINATION?