States of Matter
The state of matter where objects hold their shape is called a __________________.
SOLID
True or False?
During a PHYSICAL CHANGE, a new substance is created.
FALSE- All properties stay the same.
True or False?
A chemical change produces a new substance.
TRUE
True or False?
In a mixture, each component keeps its own shape and properties.
TRUE
A chemical reaction is...
when one or more substance produces or is transformed into a new substance.
An invisible form of matter that makes up most of our matter is called a _____________.
GAS
Give an example of a physical change that can occur in nature.
A snake could shed its skin
Melting of snow
tree branch breaking
water freezing
Give an example of a chemical change that happens in your house.
Cooking an egg
Baking bread
True or False?
Mixtures are ALWAYS easy to separate.
FALSE- Sometimes you have to know the properties of the mixture to separate the ingredients.
Examples:
Magnetism
A physical change is...
When the size, shape or form of a substance changes but DOES NOT produce a new substance.
A form of matter that is measured by its volume and FLOWS is called a __________________.
LIQUID
Give and example of a physical change that might happen in the classroom.
Pencil breaking
Paper tearing
Give an example of how we know a chemical change has occurred.
New substance
Change in color
New smell
What can help the solid in a solution dissolve faster?
Stirring it
A chemical change...
Produces a new color, smell, texture and substance
How is a solid different from a liquid?
A solid holds its shape and a liquid doesn't have a d.efinite shape
How do we know that a physical change has occurred?
Change in:
size
shape
form
Chemical changes produce a new substance. Give 2 examples of this.
Baking a cake
Burning of paper or wood
Boiling an egg
Digestion of food
In a solution, particles spread out ___________ and do not disappear.
EVENLY
A solution is...
a substance in which particles spread out evenly and do not settle at the bottom of the container.
Give an example of a situation where all 3 states of matter are present at the exact same time.
Examples:
Cooking spaghetti
Weather changes
Explain 2 differences between and physical change and a chemical change.
Physical changes do not require:
A change in temperature
Time lapses
A new substance to be formed
Explain how the souring of milk is a chemical change.
Bacteria convert the substance into acid, causing it to become sour.
- New smell
- New substance is formed
Draw a model of a mixture and a solution. Explain your reasoning.
Mixtures:
Nuts
trail mix
candy assortment
Components are...
Parts that make up a mixture