Junior Masterchef Flashcards
How do you work out how long a wave length in the choclate experiment?
You find and measure the melted spots distance from eachother and multiply by two to find 1 full wave length
What are the parts of a scientific wave?
Crest Crest
/ \ ______ / \
/ \ 1/2 / \
}Trough {_____} {
|___wavelength__|
What are the 6 rules of the particle theory?
- Everthing is made up of particles
- Particles are always moving
- There are tiny spaces between particles
- When you heat up particles, they move faster
- When you cool down particles, they move slower
- Particles are attracted to eachother
What are the 3 changes of state?
Solid, liquid and gas
What is the process called when a solid becomes a liquid?
Melting
What is the process called when a liquid becomes a gas?
Evaporating
What is the process called when a gas becomes a liquid?
Condensing
What is the process called when a liquid becomes a solid?
Freezing
What is the point halfway between a substance being a liquid and a gas?
Boiling point
What is the point halfway between a substance being a solid and a liquid?
Freezing point
What is the process called when a gas DIERECTLY becomes a solid?
Deposition
What is volume?
The amount of space an substance takes up
What is mass?
The matter that substances are made of measured in weight
What is density?
The state or quality of being dense, compactness, closely set or crowded condition
What unit is density measured in?
g/cm3
What unit is mass measured in?
g
What unit is volume measured in?
cm3
How do you work out the density of an object?
Mass/volume
How can you work out the volume of an object?
Mass/density or displacement method
How can you work out the mass of an object?
Density x volume or weigh it
What is the displacement method for volume?
- fill a jug to 50ml (exactly) with water
- place object in jug and record the new water level
- subtract 50ml from the current water level and there is your volume
What is one way to test the density of an object?
See if it floats in water. If it has a higher density than water it will sink and if it has a lower density than water it will float
Do all forms of a substance have mass? And how can you prove it?
Yes. solids, liquids and gases have mass and you can prove this by weighing them
Do all forms of a substance take up space?
Yes. Solids, liquids and gases all take up space
How do you figure out the speed of light/microwaves?
Wavelength x frequency
1ml of water is equivilent to what in volume?
1cm3
