General Science
What organ in the human body is responsible for purifying blood?
The Kidneys
What is the name of the force of attraction that bonds ions?
Electrostatic attraction
What is the name of data that shows a bell shape?
Normal distribution
What is the force of attraction between oppositely charged ions known as?
Ionic bonds
What 3 things do forces do when acting upon an object?
1. Changes the object's direction
2. Changes its speed
3. Changes the shape of the object
What subatomic particle carries light?
Photons
Explain how the velocity of a human changes as he falls from a plane towards the earth.
The human will accelerate towards the earth. Eventually, the air resistance will balance out the gravitational field pulling the human down, reaching a terminal (maximum) velocity.
What is the Word equation for the anaerobic respiration in yeast? What is this process called?
Glucose ----> Ethanol + Carbon dioxide
Fermentation
Do Solid Sodium Chloride (NaCl) crystals conduct electricity? Explain your answer.
No, Solid Sodium Chloride crystals do not conduct electricity because the ions do not move, it conducts electricity in its solid state
What does it mean when 2 things are in 'equilibrium'?
They are in a state of balance
What is the rarest blood type?
Rh nul
What is the charge of group 8/0 in the Periodic table?
0
What is one way to prevent endangered animals from becoming extinct?
Gene banks
Banning hunting these specific animals
Nature reserves
What is a redox reaction?
When one substance loses electrons and another substance gains electrons.
What do sloping lines mean in Speed-time graphs?
It indicates that Change of speed of the object (acceleration or deceleration)
Who is the scientist that proposed the heliocentric model of the solar system?
Nicolus Copernicus
What substance in cigarettes kills cilia and damages lungs?
Tar
Glucose can be used to create a substance in cell walls, what is the name of the substance?
Cellulose
What is the difference between reversible and irreversible reactions?
Reversible reactions continue reacting until finishing.
Irreversible reactions reach a dynamic equilibrium in which reactants and products do not change amounts.
What will happen to the effort if we increase the distance a force is applied from the Pivot?
Increasing the perpendicular distance from the pivot decreases the effort and force required.
What is the Unit for Magnetic Flux density?
The Tesla (T)
What does a curved line mean on a distance time graph?
The speed is changing over time
What is one mineral in the soil that is needed for a plant to grow?
Nitrates
Explain how increasing the surface area of contact between 2 objects and increasing the temperature would affect the rate of collisions and velocity?
The rate of reaction would increase as well as the velocity because there are more particles exposed and therefore heated.
What are the 8 energy stores?
What are 4 ways that energy is transferred?
1. Gravitational potential energy store
2. Electrical energy store 1. Mechanically
3. Chemical energy store 2. Heating
4. Kinetic energy store 3. electrically
5. Thermal energy store 4. Radiation
6. Elastic energy store
7. magnetic energy store
8. Nuclear energy store