Chemistry
Physics
Biology
Earth Sciences
Astronomy
100
Balance this equation: _NH3 -> _H2 + _N2
2NH3 -> 3H2 + 1N2
100
Is acceleration vector or scalar and what is the formula that defines it?
Vector, A=V/t
100
Veins tend to have the following except:
a) valves for unidirectional flow
b) very elastic walls
c) thin walls
d) increasing size toward the heart
B
100
What is the main difference between climate and weather?
Wheather is short term and climate is over a period of 30 years
100
Refracting telescopes always contain which one of the following?
w) mirrors
x) lenses
y) television systems
z) film
X
200
How many neutrons, protons and electrons are there in Boron 15?
10 neutrons, 5 protons and 5 electrons
200
What is useful energy?
The energy needed to do work
200
Of the following three substances, which provides the LEAST source
of energy for the body?
a) protein
b) fats
c) carbohydrates
A
200
Daily Double! List and explain all the types of passive and active transport
A
200
A major component of the interstellar media consists of charged particles which have speeds close to that of light. What are these charged particles called?
Cosmic rays
300
DJ - What is a substance that makes lithmus paper red and what is the pH of that substance?
An acidic substance with a pH level under 7 (Lemon juice)
300
A person travels 10 meters [W], then 15 meters [E].
What is the displacement and the distance of of that travel?
Distance: 25 meters Displacement: 5 meters [E]
300
Daily Double! List and explain all the types of passive and active transport
The answer is too long to be written here
300
What is the layer of the atmosphere in which we live in?
The troposphere
300
A typical galaxy, such as our Milky Way galaxy, contains how many
billion stars? Is it approximately:
w) 10 billion
x) 40 billion
y) 200 billion
z) 800 billion
y