Biology
Chemistry
Environmental science
Physics
?
100
What is the function of mitochondria? 
Produce energy to fuel cell activities
100
Water in a cup slowly "disappears" on a hot summer day.
A. Condensation B. Deposition C. Freezing D. Evaporation
D. Evaporation
100
Name Earth's 5 climate system.
Oops, there's only 4.
Lithosphere, atmosphere, hydrosphere, and biosphere.
:p
100
The name of "hot light source"?
Incandescence.
100
Name this compound:
(NH4)2SO3
Ammonium sulfite
200
What is the function of small intestine?
Why villi in the small intestine is important?
Function of the small intestine: absorb water and nutrients
Importance of villi: maximize surface area for nutrient absorption in the small intestine.
200
Draw the Bohr diagram for O2- (-2 charged oxygen ion).
200
Find the climate zone for Italy in Europe.
North temperate zone
200
Name 7 colours of visible light, and name the colour with longest wavelength.
Red, orange, yellow, green, blue, indigo, purple.
Red colour has the longest wavelength.
200
During mitosis, during what stage do chromosomes first become visible?
Prophase
300
Inside a leaf, what type of cell is responsible for most photosynthesis?
A. Spongy parenchyma cells
B. Palisade cells
C. Guard cells
D. Lower epidermal cells
B. Palisade cells
300
Finish in 30 seconds:
Fe2O3: _____________
Copper(I) oxide:_____________
HBr(acid name):____________
Fe2O3: Iron(III) oxide
Copper(I) oxide: Cu2O
HBr(acid name): Hydrobromic acid
300
What is the cause of ocean currents?
(hint: temperature, salt).
Thermohaline circulation.
300
On the Earth, there are hree types of electromagnetic radiation produced by the sun.
infrared, UV rays, and visible light.
300
Explain the relationship between cell division, cancer cells and healthy cells.
Healthy cells undergo 20-30 cell divisions in their whole life, where cancer cells can undergo an infinite number of cell divisions.
400
List 4 specialized cells in human body.
Red blood cells
Bone cells
Neurons
White blood cells
Sperm
Eggs
Epidermal cells...
400
Are acids and bases molecular, or ionic compounds? Explain using one balanced chemical equation.
Ionic.
HCl --> H+ + Cl-
Ca(OH)2--> Ca2+ + 2OH-
400
How can environmental scientists study yearly weather patterns?
By looking at tree rings.
400
If you were painting the walls in your classroom, would you want the walls to exhibit specular or diffuse reflection?
Diffuse reflection for painting a classroom wall.
Diffuse reflection occurs when light is scattered in different directions upon striking a rough surface. This helps to distribute the light evenly and reduces strong light reflection. Unlike specular reflection that's usually on mirror surfaces, diffuse reflection is ideal for painting walls as it creates a more uniform and pleasing appearance.
400
Name 3 types of surfaces that are translucent.
Frosted glass, fog, sunglasses, a glass of clear apple juice...
500
Name three organs in the digestive system that food does not pass through.
Liver, pancreas, and gallbladder
500
How do lakes become acidic? What can be done to help with the problem?
Acid rain, chemical spills, increased carbon dioxide concentration in the atmosphere...
Solution: liming.
500
The fossil shown below was found in Antarctica (south pole), where everywhere is covered by ice. What does this tell us about the past climate in Antarctica?
Antarctica's temperature was once warmer than present days, where the climate can support leafy plant's growth.
500
What is the difference between fluorescence and phosphorescence?
Both light sources absorb UV light and emit visible light. However, fluorescence emits much more energy as visible light than phosphorescence.
500
What is geoengineering? Will it effectively stop climate change? Explain.
Geoengineering is human intervention in climate change by reducing solar radiation on Earth's surface. It costs a lot of money and scientist's investment in developing and implementing.
Geoengineering is not the long-term solution for climate change, because it does not address global warming.