Thermal properties
Thermal transfers
Atomic Structure & isotopes
Space
Misc.
100
When liquids loose energy, it changes its state to what?
solids
100
Which one is a conductor:
A. wood
B. Glass
C. Metal
C. Metal
100
What is the charge of a Neutron and electron?
N = 0
e = -
100
Earth is an example of what?
A planet
100
Cambridge is from witch country?
England
200
What happens to the movement of liquids as it goes to a gas?
It speeds up
200
What is the name of an object that does not let thermal energy pass through it?
insulator
200
AZX Which letter is the 'proton number'
Z
200
In your own words, explain why all the planets orbit the sun.
The sun has the most mass and the largest gravitational pull.
99.8% of the mass of the solar system is the sun so all the planets, moons, meteors and comets orbit the sun.
200
Ying Hai International has one doctor. What's he/her name?
Doctor John Harrison
300
What happens to solids when they are heated?
The particles gain energy and expand
300
Define what is inferred thermal radiation and give an example of it.
It is thermal energy transfer by using electromagnetic waves.
An example of it is heat leaving your body or the sun's radiation
300
Which radiation has small wavelengths and can penetrate most objects, even some metals.
Gamma
300
What units of measurement would you use:
a. Earth to the moon.
b. The sun to the Earth
c. Earth to another solar system
a. Kilometres (km)
b. light minutes
c. light-years
300
What is the name of this little monster?
Stitch
400
What are some uses of thermal expansion?
answers vary
400
In cold countries, most windows are double-glazed that consist of two sheets of glass with a space in it.
Explain why little energy can escape by thermal convection.
The gap between the sheets of glass is a vacuum. The difference in temperature will create a convection current in the vacuum not affecting the temperature of the room.
400
The following is the date of changing count rates through different materials.
Source --400counts-->paper --350counts--> aluminium--300counts--> lead(10mm)--240couns/s
State how many alpha, beta, and gamma particles are there.
a= 50 counts/s
b = 50 counts/s
g= 60 counts/s
400
Explain why Earth is closer to another galaxy than the centre of our own
n?
From Earth to the centre of our galaxy is 2/3 the radius, which is about 33,333 light-years
It's only 15,000 light-years from Earth to Canis Major
400
What are the names of these two sisters
Anna & Elsa
500
Explain how metallic strips are used in fire alarms
As the temperature heats up, one of the metals on the strips will expand causes the circuit to become close, starting the alarm to warn others of a fire.
500
Describe how a heater at the bottom of the tank heats all the water in the tank.
Convection current.
Heat rises, and cold falls down. The heating element heats the cold water at the bottom, rising and repeating the process.
500
A sample or radioactive substances contian 2400 undecayed models.
How many numbers of atoms remain after 3 half-lives?
300 atoms
500
Knowing that the speed of light is 3x10^8 m/s.
How long will light take it from Jupiter to reach Earth for us to observe it with a telescope.
Distance from Jupiter to Earth on this date (1/11/2024) is 690,409,726 km.
Have your answer in light-minute and to 2 decimal digits.
speed of light = 300,000 km/s
Distance = 690,409,726 km
S = D/T ; T= D/S
T= 690,409,726 km/300,000km/s
=2,301 seconds = 38.36 min.
500
What is this flag of during WWI
Germany