Recycling Unit Part 1 Test Review

Recycling Unit Part 1 Test Review

Defining and Describing Recycling

• Human Recycling: Process of collecting and processing materials that would otherwise be thrown away as trash and turning them into new products.

• Natural Recycling: Process of taking matter and atoms of all types and reusing them or converting them into something different.

Recycling as a System

• A system is a series of interconnected parts that work together to accomplish a task or series of tasks.  

• Some systems can be influenced by the environment.

• If one part of the system fails, the whole system may fall apart or not work properly

Open or Closed-Loop

How much interaction between matter in and out and energy in and out determines if a system is open or closed.

The Hydrologic Cycle

• Closed system because water is neither created nor destroyed on a large scale. 

• Water exists as solid, liquid and gas phases that are interchangeable at temperatures found on earth.

• There is an exchange of energy between the water cycle and the environment, but no exchange of matter outside the water cycle.

Multiple Choice

The water cycle is a(n)

• open system

• closed system

Properties of Matter & Change

Physical vs Chemical Properties

Multiple Select

Which of the following are physical properties?

• Toxicity

• Color

• Density

• Melting point

Multiple Select

Which of the following are chemical properties?

• Solid

• oxidation

• acidity

• flammability

Multiple Choice

An apple turning brown is an example of a...

• physical change (color)

• chemical change (oxidation)

Reading the Periodic Table

Multiple Choice

How many protons in sodium?

• 11

• 23

• 12

Multiple Choice

How many neutrons in sodium?

• 11

• 12

• 23

Multiple Choice

The atomic number represents

• number of protons

• number of neutrons

• number of electrons

The Atom

What's inside and where it is

Multiple Select

Which particles are found in the nucleus of an atoms?

• protons

• neutrons

• electrons

Chemical Bonds

Let's connect

Multiple Choice

The best way to determine how elements will bond is to look at the...

• ionization energy

• electronegativity values

• atomic radius