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CH 1 The Scientific Process
Chapter 1 Definitions
Chapter 2 Definitions
Ch 2 Law of Conservation of Matter
Chapter 2
100

What is the first step?

Observe

100

Systematic Study of the universe to produce observations, inferences, and models

Science 

100

Uniform Appearance 

Homogenous

100

- The temperature at which it changes from a solid to a liquid.

- The temperature at which it changes from a liquid to a solid.

- The temperature at which it changes from a liquid to a gas.

 - melting point

- freezing point

- boiling point 

100

what are the 4 states of matter?

plasma, gas, liquid, and solid

200

What is the second step?

Make a hypothesis 
200

The study of non-living things

Physical Science 

200

non-uniform appearance 

heterogenous

200

a process in which a liquid substance changes into a gas state at a temperature below its boiling point. continues until all of the liquid has been converted into gas

evaporation 

200

Physical property vs. Physical change

  • Physical Property is anything about a substance that can be observed or measured without altering the substances chemical composition
  • Physical changes involve a change in the physical state of matter or its physical properties, but no new substances are formed. This can be reversed. 
300

What is the third step?

Perform experiments

300

Describes why something is happening

Law

300

pure substance containing atoms of 2 or more different elements

compound 

300

a process in which a solid substance changes directly into a gas state without first becoming a liquid. Temperature and Pressure play a role.

Sublimation

300

Chemical property vs. Chemical change 

  • Chemical changes involve the formation of new substances with different chemical properties. The atoms and molecules of the reactants re-arrange to form new products. Irreversible! Chemical Reactions
  • Chemical  Properties describes how a substance changes in the presence of another substance or under certain conditions.
400

what is the fourth step?

Analyze data

400

Gives an explanation of why something might happen

Theory

400

material made of only one kind of element or compound

pure substance 

400

a phase change in which a gas substance changes into a liquid state. Occurs when the temperature of a gas is lowered below its dew point, at which point the molecules become strong enough to cause them to come closer together and form a liquid. A common occurrence in nature and can be seen in different phenomena.

Condensation 

400

Exothermic vs. Endothermic

What happens to bonds and energy in each?

Exothermic is the release of energy and breaking of bonds

Endothermic is the formation of bonds that requires energy

500

what is the fifth step?

draw conclusions based on data

500

every effect has a specific, identifiable cause, and for every cause, there is a definite and predictable effect 

Law of Cause & Effect

500

The simplist of pure substances. Consists of atoms with the same atomic number

element 
500

a phase change in which a gas substance changes into a solid state without fist passing through the liquid state. Occurs when the temperature of a gas is lowered below its sublimation point, at which point the molecules become strong enough to cause them to come closer together and form a solid.

Deposition

500

Describe the particle model 

Particle Model: The states of matter are determined by the relationship between the kinetic energy (energy of motion) of the particles and the attractive forces between them.