Matter All Around
What is matter?
Matter is everything you can see, touch, taste or smell
What is the definition of "property" of matter?
it describes what matter is like
What happens to the particles in a physical change?
They are rearranged
What happens in a chemical change?
Particles change to produce a new substance
Where does our garbage go?
To the landfill or burned in an incinerator.
What are the 3 states of matter?
Solids, liquids and gases
Why is a bike made of titanium?
It is strong but lightweight
A solid to gas is ______________.
sublimation
true or false: Most chemical changes cannot be undone.
true
Give 2 examples of non-recyclable matter
food containers, plastic toys, diapers
What characteristics do gases have? (3)
no size or shape, particles spread apart and move freely
What kind of material does a chair need?
Strong, needs support, hard
Solidification
Give an example of a chemical change.
Burning toast, roasting a marshmallow, burning wood, glassblowing
What is biodegradable?
Can be broken down in the soil and turned into nutrients.
What is different between the states of matter?
How the particles are arranged
Rubber bands are _______
Elastic
true or false: all physical changes are reversible
false
What clues are there ina chemical change?
new smells, light, heat or sound
What kinds of things are biodegradable? (2 examples)
food, plants, animal waste
true or false: A solid keeps its shape if you leave it alone
true
What is easy to bend? What is hard to bend?
flexible, rigid
What do most non-reversible changes involve?
a cutting or breaking action
Which is not a chemical change?
1. freezing yogurt
2. cooking eggs
3. baking a cake
4. spoiling milk
number 1
What three types of waste are there?
recyclable, non-recyclable, biodegradable