Physics
Which colour light has the most energy? Red, orange, yellow, green, blue, indigo or violet?
Violet. Violet light has about 1.5x as much energy as red light.
What does DNA stand for?
Deoxyribonucleic acid.
What is the only liquid metal under room temperature?
Mercury.
Light-year is a unit used to measure...
Distance. How far light travels in 1 year! (9.46 trillion kilometres (9.46 x 1012 km))
What type of sedimentary rock is one of Australia’s most important mining sources that produces aluminum?
Bauxite.
Which scientist first measured the speed of light?
Ole Rømer. He used planets to help him calculate the speed of light. His methods were so accurate that the only reasons his measurements were not closer was because other people’s calculations of planet sizes/distances were a bit off.
A blood disorder/inherited disease known as the Royal Disease. For example, Queen Victoria of England had it.
Hemophilia.
Which noble gas has an 'A' as its first letter?
Argon.
Phobos and Deimos are the Moons of which planet?
Mars.
Which climate zone is Brisbane in? (You need two descriptive words in here.)
Humid subtropical climate.
This ‘v’ word describes a fluid’s ability to resist flowing.
Viscosity.
What does ATP stand for?
Adenosine triphosphate.
What is the only letter that doesn't appear in the periodic table?
J.
What color is the sunset on Mars?
Blue. Dust in the Martian atmosphere has fine particles that permit blue light to penetrate the atmosphere more efficiently than longer-wavelength colors.
Which country has the longest coastline?
Canada, due to the number of northern islands.
A compound pulley system is made of a movable pulley A and a fixed pulley B. A rope is attached to a fixed anchor point on the ceiling, going under pulley A which is attached to a 10kg load and then sent back down to the floor via pulley B which is also attached to an anchor point on the ceiling. How much force needs to be acted on the end of the rope to make sure the load gets lifted up and moves up in a constant velocity? Assume the gravitational acceleration takes the value of 9.8m/s^2, and pulley A doesn‘t have any weight.
W=mg=10x9.8=98N.
98N/2=49N.
What is the name for a gene editing technique that precisely cuts DNA and then letting natural DNA repair processes to take over? The system consists of two parts: the Cas9 enzyme and a guide RNA.
CRISPR/Cas9.
Which are the two major ions found in table salt?
Sodium ions and Chloride ions.
How long will it take for the footprints on the moon to be erased naturally?
About 100 million years.
What caused the rise of the Himalayan Mountains?
The convergence of the Indo-Australian plate with the Eurasian plate.
How much force should be acted on a rope attached to an iron block that is fully submerged in water to make sure the block stays still under water? The Iron block has a density of 7800 kg/m^3 and a volume of 0.01 m^3. Water has a density of 1000 kg/m^3. Assume the gravitational acceleration takes the approximate value of 10m/s^2.
Force = Weight - Buoyancy
=ρ(iron)vg - ρ(water)vg
=7800x0.01x10 - 1000x0.01x10
=680N
Albinism is an autosomal recessive disease. Adam and Becca have two kids, Cindy and David. Adam and Becca are both healthy as well as their daughter Cindy; however, their Son David turns out showing albino symptoms. What is the probability that their daughter Cindy is a carrier of the albino gene?
2/3.
What type of chemical bond is formed by mutual sharing of one or more pairs of electrons between two atoms?
Covalent bond.
How long does it take sunlight to travel from the Sun to the Earth?
t=d/v=(1.5x10^11)/(3x10^8)
=500 seconds
=8 minutes and 20 seconds.
Name the five countries that share borders with Bolivia.
Peru, Brazil, Paraguay, Argentina and Chile.