Biology
In Human organ systems, which system works with all other systems?
Nervous system
A mystery solution had pH 5. Which one describes the best? Options: Strong acid, Slightly Neutral, Strong Base, Weak acid
Weak acid
Which light production produced by heating a material until it glows. It is inefficient as most of the energy is lost as heat.”
Options: Incandescense, Flourescence, Phosphorescence
Incandescence
What reflects sunlights? Answer 3 things
During mitosis, what is the process after interphase?
prophase
DOUBLE POINT!! Name prefix of 1 - 8 that are used to covalent compouds
A: mono, di, tri, tetra, penta, hexagon, hepta, octa
When you know the speed of light in medium, and want to know the index of refraction, which formula are you going to use?
Options: n=c/v, n1sin01=n2sin02 , v=fλ
n=c/v
Which layer of atmosphere has most of the Ozone that protects Earth from UV rays?
Options: Stratosphere, Troposphere, Thermosphere, Mesosphere
Stratosphere
What’s the difference between Prokaryotes and Eukaryotes
Prokaryotic cells are small and simple, no nucleus but Eukaryotic cells are large and complex and there's a nucleus inside the cell.
Balance the chemical equation. Aluminum has 3 positive charges.
__Al+ __O2→__ Al2O3
4Al+ 3O2→2 Al2O3
What is SALT when object is placed between C and F in front of the concave mirror
S- larger A- Inverted L- Beyond C T- real
Why do natural greenhouse gases are needed?
We need them to trap heat so we could live with moderate temperature.
What is the purpose of cloning for farming and give me an example of it.
Farmers use cloning to prude crops with the same desirable traits. It helps to grow plants that are stronger, healthier, and more productive. Example: farmers may clone corn that can survive harsh weather and resist insects.
Arrange the things in order from most acidic to most basic, going left to right; Water, Lemon, Tomato, baking soda
Lemon (pH2)→Tomato (pH4)→ Water (pH7)→ Baking soda (pH9)
How do glasses correct vision problems such as myopia?
Glasses that have concave lenses spread light to shift focus back so the light can focus on the retina.
What is the difference between weather and climate?
Weather is short term conditions and climate is a long term thing.
DOUBLE POINT!! Explain what happened to Peter Parker’s DNA in movie “Spider man”
Peter Parker was bitten by a genetically modified spider and spider’s venom replaced some of his DNA causing MUTATION in his body.
What is the chemical formula for sodium sulfate? Show us the step to make chemical formula
Na
Na+ + (So4)2- = Na2SO4
DOUBLE POINT!! A ray of light enters water(n=1.33) from ice (n=1.31) at x angle. The ray is bent toward the normal at an angle of 45°. Calculate the x angle using snell’s law.
snell’s law: n1sin01=n2sin02
1.31sin(45)=1.33sin(x)
0.97=1.33sin(x)
Sin-1(0.97/1.33)=x
X=46.83
X is 46.83°
What is the one thing you could do to solve global warming?
We could use public transportation to reduce gas emissions. Also, if everyone uses public transportation, the less cars produce, and less gas emitted from the car production process.