Types of Reactions
What are the starting substances in a chemical reaction called?What is the name of a negatively charged sub-atomic particle?
Reactants
What does the rate of a reaction describe?
How quickly reactants are used up or products form.
What is an allele?
An alternative version of a gene.
The independent variable is the variable that you?
Change
What did the science faculty dress up as this year for book week?
Mario Kart
Give TWO observations that may indicate a chemical reaction has occurred.
Gas production, formation of a precipitate, colour change or an unexpected temperature change.
Name TWO changes that could make a reaction faster.
Increase temperature, increase concentration, increase a solid’s surface area or add a suitable catalyst.
What is the difference between genotype and phenotype?
Genotype: an organism’s allele combination. Phenotype: its observable characteristics.
Making a judgement based off an observation is called an?
Inference
Who was the drummer for the staff band in the battle of the bands?
Mr Maguire
Why must chemical equations be balanced?
Atoms are conserved, so each element must have the same number of atoms on both sides.
Why does crushed calcium carbonate react faster than large chips of the same mass?
It has a larger exposed surface area, allowing more frequent collisions with acid particles.
In pea plants, tall (T) is dominant to short (t). Cross Tt × tt. What percentage of offspring is expected to be short?
50%, with genotype tt.
I am testing the effect of a new fungicide on a sample of 10 banana trees. How can I make my investigation more reliable?
Repeat the experiment or increase the sample size.
Which planet has the tallest mountain in the solar system?
Double points if you can name the mountain.
Olympus Mons on Mars
Balance: Mg + O₂ → MgO.
2Mg + O₂ → 2MgO
Use collision theory to explain why increasing temperature increases reaction rate.
Particles move faster and collide more frequently; a greater proportion of collisions have enough energy to react.
Two unaffected parents have a child with an autosomal recessive condition. What must the parents’ genotypes be?
Both are heterozygous carriers: Aa × Aa.
A student changes both temperature and acid concentration, then concludes temperature caused the faster reaction. Explain the problem and suggest an improvement.
Two variables changed, so their effects cannot be separated. Change temperature only, keeping concentration and other relevant variables constant.
Who recorded Neil Armstrong on the moon?
The camera on the ship
A sealed container holds 12 g of reactants. After a reaction produces a gas, what is the total mass of the contents? Explain.
12 g. Mass is conserved, and the gas remains inside the sealed container.
Equal masses of powdered and large-chip calcium carbonate react separately with identical excess acid. Compare their gas-volume graphs.
Powder has a steeper initial slope and finishes sooner. Both reach the same final gas volume because the same amount of calcium carbonate reacts.
Two carriers of an autosomal recessive condition already have an affected child. What is the probability their next child will be affected? Explain.
25%. Each child independently has a 1-in-4 probability of inheriting aa.
I have done an investigation on the effect the number of hours spent studying on the marks a student received. Each student spent a different amount of time studying for the same quiz and their results were recorded.
What type of graph would I use to represent my results and what would be the X and Y axis for that graph?
Linear/Line Graph
X axis: Study Hours
Y axis: Marks Received
What is the last day for students?
Friday 11th of December