Scientific Method/ Observations/ Inference
We use these to make observations.
What is our 5 senses?
What is solids, liquids, gases, and plasma.
This is the universal solvent.
What is water?
____________: A substance that can be dissolved
____________: A substance that cannot be dissolved
Soluble; insoluble
________: 1 liquid is soluble in another liquid; 1 liquid can be dissolved in another liquid
_________: 1 liquid is insoluble in another liquid; 1 liquid cannot be dissolved in another liquid
Miscible; immiscible
A conclusion we make based on many different observations.
What is an inference?
1) ________: definite volume but not a definite shape; particles touch and are able to slide past one another so they can take the shape of their container
2) _________: definite shape and definite volume; atoms packed tightly together; atoms vibrate a little but stay packed together; we cannot see this movement
1) Liquids
2) Solids
1) ________: The part that does the dissolving (usually the greater amount)
2) _______: The part that is being dissolved (usually the lesser amount)
1) solvent
2) solutes
True or False:
A physical property is a reversible process and a chemical property is not a reversible process.
True
This term is described by how tightly the atoms are packed together in a given space (volume).
What is density?
The 6 steps of the scientific method.
What are purpose, research, hypothesis, experiment, analysis, and conclusion?
3) _________: no definite shape or volume; examples include sun, stars, lightning; fluorescent bulbs; most common state of matter in the universe (but not on Earth); made of charged particles (ions and electrons) that can be held in place by a magnetic field
4) _____________: no definite volume and no definite shape; atoms move around rapidly in all directions; if not contained gases will spread out indefinitely; if contained, they will take the shape of their container
3) Plasma
4) Gas
The critical temperature for melting and freezing in Celsius and Fahrenheit.
What is 0 degrees Celsius and 32 degrees Fahrenheit?
Write the correct term and give an example of each.
1) _______ properties: properties that can be observed without changing the substance into another substance
2) ______ properties: properties that chemically change a substance into a different substance
1) Physical Properties- color, shape, volume, mass, density
2) Chemical Properties- flammability, reactivity, corrode (forms rust), toxicity
The formula for density.
What is D=M/V?
Give an example of qualitative and quantitative observations.
Qualitative- describes things
Quantitative- includes measurements or amounts (a quantity)
These three processes require the absorption of thermal energy.
(Choices include: melting, freezing, vaporization, condensation, sublimation, and deposition)
What is melting, vaporization, and sublimation?
The critical temperatures for vaporization and condensation in Celsius and Fahrenheit.
What is 100 degrees Celsius and 212 degrees Fahrenheit?
Complete the term.
1) _________ physical properties: properties that depend on the amount of a substance that you have; examples include volume, mass, length, shape
2) ________ physical properties properties that do not depend on the amount you have; examples include color, density, melting points, boiling points
1) Extensive
2) Intensive
In a density column, the _____________ is found at the top of the column and the __________ is found at the bottom of the column.
least dense or lightest; most dense or heaviest
The step in the scientific method where you compare the hypothesis to the experiment's actual data and communicate results.
(Give the name of the step)
These three processes require the release of thermal energy.
(Choices include: melting, freezing, vaporization, condensation, sublimation, and deposition)
What is freezing, condensation, deposition?
Write the correct term and give an example of each.
1) ____________: a solid turning directly to a gas (skips the liquid phase)
2) ____________: a gas turning directly to a solid (skips the liquid phase)
1) Sublimation - dry ice
2) Deposition - dew on grass
Complete the term and give an example.
1) ______ change: change in a substance that results in a new substance being formed.
2) _________ change: changes do not result in new substances being formed (the chemical composition of a substance has not changed)
1) Chemical - Examples of chemical changes include flammability, reactivity (with oxygen, water, vinegar), combustible (ability to ignite and catch fire)
2) Physical- Examples of physical changes include changes in shape, size (mass and volume) and phase changes
The way scientists determine the volume of a weird or round shaped object.
What is water displacement?