Year 9 Sem 2 Science Revision

Biology

100

The 2nd order consumer in this food chain

Grass -> rabbit -> fox -> eagles

Fox

200

What is the name for multiple individuals of one species

population

300

What is an example of second line of defense get against pathogens 

Macrophage (WBC - non specific immune). 

400

The name for symbiosis where one thing benefits and the other is not positively/negatively impacted

commensalism

500

Explain how and why vaccines work (DETAILS REQUIRED FOR POINTS)

Upon injection with a vaccine the body is exposed to a pathogen and memory cells are created to identify it's presence when it occurs again. This means the body can produce more antibodies to 'attack' the disease when it next shows up. 

Physics

100

Units of measurement for Resistance

Ohms

200

Part of the circuit used to measure current

Ammeter 

300

In a parallel circuit, what happens to voltage

Each branch receives the same voltage

400

If a circuit has 40V and a current of 2A what must the resistance be? 

20 Ohms 

500

How does a motor work

When a current runs through a magnetic field it can cause torque on a wire, causing a motor to spin. 

Chemistry

100

What is the Pop test for 

Testing if a gas is Hydrogen 

200

Give the base equation for neutralization 

Acid + Base -> Water + salt 

300

Beta decay of nitrogen would produce what?

Oxygen + e-

(alpha decay releases a He nuclei, and gamma releases gamma radiation)

400

Give the name for the missing compound 

Sulfuric acid + _______ -> Copper Sulfate + ___ + water

copper carbonate, Carbon dioxide

500

Give the chemical symbol for the missing compound. 

Mg + HNO₃ ---> _______ + H₂

Mg(NO₃)₂

Lucky dip

100

What is a producer

a photosynthetic organism/plant

200

Describe what happens when you bring a negatively charged object near another negatively charged one

They will repel each other

300

What is wrong in this equation

HCl + MgO -> MgCl + H₂O

There needs to be 2HCl and MgCl must be written as MgCl₂

400

Balance this equation

H₂SO₄ + NaOH ----->  Na₂SO₄ + H₂O

H₂SO₄ + 2NaOH ----->  Na₂SO₄ + 2H₂O

500

(NON ASSESSABLE)

Cnidariology is the study of what?

Coral / reefs

Trivia

100

Mary Fowler (Matilda's QUEEN) has been seen dating an NRL player.
Who and from which club

Nathan Cleary - Panthers

200

What does the Maori word whānau mean

Family

300

Name 3 of the 7 natural wonders of the world 

Everest, great barrier reef, victoria falls, northern lights, Rio harbour, grand canyon, Paricutin Volcano

400

Which science teacher at CGS has a twin

Mr Shirley 

500

To the nearest 10 how many songs has taylor swift released 

240 (243, Rolling Stone; Oct 23).