Biology
Chemistry
Physics
Practicals
Science Vocabulary
100
What type of bond do sodium and chlorine have?
Ionic
100
How do you find density from mass and volume?
Density= mass/volume
100
Why should long hair be tied back in an experiment?
As it could interact with the experiment as a safety hazard.
100
Define urethra.
The tube that carries urine from the bladder to the outside.
200
What in the name of the process that moves carbon from fossil fuels into carbon dioxide in the atmosphere?
Combustion
200
Carbon has an atomic number of 6. What is its electronic structure?
2, 4.
200
What are the three types of ways thermal energy are transferred?
Conduction, convection and radiation.
200
What is a hypothesis?
A testable statement used in experiments that can be answered through testing.
200
Define precipitate.
An insoluble solid formed when two soluble substances react.
300
What is the the 2 transport systems in plants?
Xylem and Phloem
300
Put the following metals in order of reactivity from low to high. Silver, Magnesium, Sodium, Iron, Gold, Copper
Gold>Silver>Copper>Iron>Magnesium>Sodium
300
If you increase the vibrations in a sound wave what happens to the pitch?
It increases.
300
What are 5 things that are important to have on a graph?
Axis titles, Graph title, Clear data points, appropriate scale, correct trendline, legend (if necessary), units of measurement.
300
Define a parallel circuit.
A circuit which branches out to form more than one pathway for the current.
400
How can smoking affect fetal health?
Reduces oxygen from blood to fetus, nicotine enters fetus and makes them addicted, damages blood vessels in fetus.
400
What is the products from the reaction between copper oxide and sulphuric acid.
Copper sulphate and water.
400
Describe the life cycle of a star.
Star is formed in a stellar nursery, depending on the size of the star it then eventually turns into a red dwarf or a giant red dwarf, after which it either explodes into a supernova or a planetary nebula, it then either ends up to be a white dwarf (if smaller) or a neutron star or black hole (if larger).
400
A student conducted an investigation, his hypothesis was not supported by his results, he repeated the same experiment and the results were the same. Was his experiment a failure?
No, the results was able to eliminate the assumptions made by the hypothesis therefore was successful in getting one step closer to the true answer. Sometimes mistakes can lead to unexpected results and therefore new discoveries.
400
Define collision theory.
One of the theories about the moons formation where a small planet size asteroid called Theia crashes in a protoform Earth.
500
How do genes help to produce variaton?
Genes are made of DNA which contains unique coding of which not all are seen in the phenotype. In sexual reproduction variation is gained as the offspring gain different combinations of the genes of which again few are expressed in the phenotype. Include random mutation you can gain high levels of diversity in offspring as they receive slightly different combinations of DNA.
500
There are many factors that can affect the rate of reactions. What are 3 of these factors?
Concentration, temperature, surface area/volume ratio, reactivity of the elements, pressure, presence of a catalyst.
500
Use ohms law to find the voltage across a 6 ohm resistor with a 2 amp current.
voltage= current x resistance therefore 2x6=12. The answer is 12 volts.
500
A student made a circuit using a battery, a voltmeter, an ammeter, a light bulb, and a switch.
He wanted to test the potential energy differnce of the lamp.
What is an appropriate circuit diagram for him to be successful?
500
Define displacement reaction.
A reaction in which a more reactive metal replaces a less reactive metal from a compound.