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Say the difference between physical and chemical changes and give at least 3 examples.
...
Recall the density formula and tell the meaning of density.
Density is the measurement of how much matter concentrates in a specific space. To calculate density = mass divided
What is the state of the freezing point and boiling point for water?
Freezing - 0 degrees and boiling - 100 dregrees.
Describe the process: Condensation.
Is the change from gaseous to liquid.
Describe the processes: Evaporation/boiling.
Is the change from liquid to gaseous state.
Describe the process: Freezing
Is the change from liquid to solid.
Describe the process: melting.
Melting is the change from solid to liquid.
What are the three main states of matter and describe the difference in their internal energy?
Solid, liquid and gas. Solid = Few internal energy, Liquid = more internal energy and Gas = more energy than the rest because of the space.
What is the minimal particle of matter?
Atoms.
What is mass and volume?
Mass, measured in g; mass is how much matter there is in an object Volume, measured in ml, cm3; volume is the amount of space something takes.
What is a tonge?
It is like a large pincer.
What is a test tube?
It is a small cylinder to handle chemicals.
What is a stop watch?
used to measure time when you're doing a chemical reaction.
What is a ring stand?
to support other pieces of equipment and glassware.
What is a pipette?
used to measure or transfer small amounts of liquid.
what is a pestle and mortar?
it's used to crush solids with a pestle.
What is a petri dish?
used to study microorganisms in laboratories.
What is a Graduated cylinder?
used to measure the volume of a liquids.
What is a Funnel?
Used for separating solid substances from solution.
What is a forceps?
they are used to grab small objects fingers are way too big to grab.
What is a Erlenmeyer flask?
The flask is often used for stirring or heating solutions.
What is a condenser?
a condenser is laboratory apparatus used to condense vapours that is, turn them into liquids by cooling them down.
What is a bunsen burner?
Burns gas and it produces a single gas flame.
What is a beaker?
A glass container used in laboratories to hold liquid or solid samples.
What is a scale?
A scale typically refers to handling larger volumes.


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