Show:
Starting Science
Matter and Materials
Matter and Materials
Starting Science
Experiment
100
You need to wear safety glasses all the time during any prac. Ture or false?
True
100
Define "Evaporation".
Changing state from liquid to gas.
100
Define "Condensation".
Changing state from gas to liquid.
100
Identify the equipment:

Container for mixing or heating liquids and other substances.

Beaker
100

Ball and hoop experiment: before heating, a ball went through the hoop but after heating, it didn't.

What did you learn from this experiment? 

Substances expand when heated.

Substances contract when cooled.

200
What does it mean if you have a chemical that labelled as "Corrosive".
The chemical can cause severe damage/ burn to skin and eyes.
200
What is the boiling point of water?
100 degree
200
Which one has more space between the particles? Gas or solid?
Gas
200

Identify the equipment:

The device to heat substances

Bunsen burner
200
Density tower experiment: you used honey, detergent, water and oil to make density tower.

What was the order from bottom to top and why?

Honey, detergent, water oil

higher density on the top and lower density on the bottom

300
How do you stay safe when you handle "Flammable" liquid?
Keep the liquid away from flames.
300
What is the process (changing state) when matter turns directly from gas to solid?
Deposition
300
What is the process (changing state) when matter turns from solid to gas?
Sublimation
300

Identify the equipment:

SUpports a container over a Bunsen burner while it is heated.

Gauze mat
300
Icecream experiment: you made ice cream.

What was the aim of this experiment?  

TO observe the phase change: freezing
400
In your lab report, you need to have Aim, Material, and...? List all of them required in a lab report.
Aim, Material, Risk Assessment, Method, Results, Discussion and Conclusion
400
What is the formula of density? Density = deviding ( ) by ( )
Density = dividing its mass by its volume
400
The density of liquid A is 0.2 g/cm3 and the density of liquid B is 0.9 g/cm3. Which one will float on top of other liquid when you mix the liquids?
Liquid A
400

Identify the equipment:

It supports a gauze mat over a Bunsen burner

Tripod
400
Designing boat experiment: you designed and made your original boat and investigate how many marbles your boat could hold.

What was the aim of this experiment? 

To investigate the effect of surface tension of water.
500
What do you need to do to increase reliability in an experiment?
Experiments need to be repeated a number of times to avoid any errors.
500
Identify in which state (gas, liquid or solid) the particles have the most energy. Explain why.
Solid because the particles are strongly attracted to each other and can't move freely.
500
Why gasses can be compressed?
The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.
500

Identify the equipment:

It is used with a clamp and bosshead to hold equipment at the required height.

Retort stand
500
Worksheet: we practise how to calculate density. what is the density of oil when volume is 2 mL and mass is 4g. 
Density = mass/volume

so density =4/2= 2 g/mL