EnviroChem11
What is the role of proteins
Structure and speeding up chemical reactions
The sub atomic particle with a negative charge
electron
What part of the world is the most diverse?
The equator
What does LD 50 stand for and what is it?
Lethal dose 50
How much of something it takes to kill half the population
How do you tell if something is organic?
It has C and H in it
The type of elements found on the left hand side of the periodic table of elements.
Metals
What is mutualism, parasitism and commensalism?
+,+ +,- +,0
What makes an acid an acid and a base a base?
Hydrogen and ph less than 7
hydroxide and ph greater than 7
Is Diffusion active or passive transport? Explain using concentration.
Passive transport because it goes from a high concentration to a low concentration
Name Ca3N2
Calcium Nitride
What is Fertilization (not the fertilizer kind) and what does it make?
Egg and sperm combining to form a zygote
Calculate the ppm of 3mL in a 3000 mL solution
1,000ppm
Name the 5 steps of the nitrogen cycle in order
Nitrogen Fixation, nitrification, assimilation, ammonification, denitrification
Name one of the atomic models and name one feature about it.
Dalton: Solid sphere
Thomson: Negative electrons in positive ball
Rutherford: Negative electrons orbiting positive nucleus
Bohr: Negative electrons in energy shells around positive nucleus
Schrodinger: Electron cloud and probability
What is the difference between continuous and discreet traits?
Continuous has many values e.g. height
Discreet is either/or e.g. Ear lobes, Hitchhikers thumb
What is a manipulated and responding variable
manipulated variable is the thing you change
responding variable is what changes because of the manipulated variable
Explain the difference between Bioaccumulation and Biomagnification.
Bioaccumulation is the amount of something growing in one individual, while Biomagnification is the amount of something growing as you go up the food chain.
How many neutrons are in calcium if it's atomic number is 20 and it has a atomic mass of 41
21
Contrast Meiosis and Mitosis
(2 each)
Meiosis makes 4 different gametes, while Mitosis makes 2 identical cells
The amount of electrical energy used Joules if a 50 watt TV is left on for 1 hour.
Hint E=Pt, t needs to be in seconds
180, 000J
What are the two things made when an acid and a base mix. Double points if you can say why
Water and salt
H combines with OH to form HOH or H20
Metal combines with non-metal to form salt