Unit 1
anything that takes up space and has mass
What is Matter?
a material that can not be separated physically into other parts.
What is a pure substance?
density, melting point, boiling point, color, texture, odor, solubility, malleability, and conductivity.
What are some physical properties?
All objects around you are made up of different kinds of materials.
What is true?
Disposal
What is the last stage of the life cycle of an object?
a measure of the amount of matter in an object
What is Mass?
substance that cannot be separated or broken down into simpler substances
What is an element?
Every substance have physical and chemical properties.
What is true?
a substance, material, object, or source of energy that is found in nature and is useful or valuable to humans.
What is a natural resource?
something you want but do not need,
What is a desire?
gravitational pull on an object
What is Weight?
smallest unit of an element that has the chemical identity of that element
What is an atom?
When a substance undergoes this, the identity of a substance stays the same.
What is a physical change?
long molecules that are made up of five or more repeating units.
What are polymers?
contains an orderly arrangement of all of the known elements.
What is the periodic table?
Property measured using the unit, Newtons
How do scientists measure weight?
an elements can have the exact same properties as another element
What is: No, but they can be close to one another
One example is rust
What is a chemical change?
Obtaining resources.
What is the first stage of the life cycle?
John Dalton
Who is credited with creating the atomic theory?
M = F/a
What's a formula used to calculate weight?
The number of protons in an atom is called this
What is the atomic number?
When a substance undergoes this, the identity of a substance is changed.
What is a chemical change?
alternative to disposal in the life cycle of a material; can bypass obtaining resources
What is recycling?
A combination of chemical symbols and numbers that represents a single unit of a substance
What is a chemical formula?