Name: ______Date: ______

SNC 1D – Grade 9 Science Exam Review

In order to best prepare for the exam there are two main areas of learning you should focus on:

1)  Knowledge (learning and understanding the basic facts eg. definitions, formulas, concepts, diagrams…)

2)  Skills (mastering the skills of problem solving and interpretation)

In this review, each unit is divided into these two sections. For the Knowledge component, you will be required to make study notes on the given topics to help you learn and understand them. For the Skills component, you will be given sample problems to practice.

Biology Unit - Knowledge Topics

1.  Define and/or explain the following terms. Be specific.

a.  Ecosystem

b.  Sustainability

c.  Biodiversity

d.  Abiotic factors

e.  Biotic factors

f.  Habitat

g.  Niche

h.  Population

i.  Community

j.  Producer

k.  Consumer

l.  Carnivore

m.  Herbivore

n.  Omnivore

o.  Scavenger

p.  Carrying capacity

q.  Photosynthesis

r.  Respiration

2.  Sustainable ecosystems and unsustainable ecosystems

3.  Four spheres of the earth

4.  10% rule

5.  The carbon cycle (six factors + diagram)

6.  Population growth patterns (four factors)

7.  Carrying capacity (four factors)

8.  Predator-prey relationship (Elk-Wolf study)

Biology Unit – Skills questions

1.  Describe a specific example of a sustainable ecosystem and give three specific reasons why it is sustainable.

2.  Describe a specific example of an unsustainable ecosystem and give three specific reasons why it is not sustainable.

3.  Describe one example for each of how humans have affected the lithospshere, hydrosphere, and atmosphere.

4.  Draw a food chain for the organisms in question 4. Below the chain label the following organisms: producer, primary consumer, secondary consumer, tertiary consumer, all the trophic levels, herbivore, carnivores.

5.  a) Draw a pyramid of numbers if in an ocean ecosystem there are 15,000 phytoplankton, 5000 zooplankton, 200 sardines, 5 otters.
b) Draw a pyramid of energy with the same organisms if the phytoplankton contain 80,000 J of energy.

6.  Study the following food web. Describe all the

population changes that would occur if

a)  a new species of frog entered the ecosystem

b)  a pesticide killed all the birds.

c)  the cougars were hunted to extinction

7.  In the western world our diet contains much more meat than most eastern diets. How is our diet more demanding on our agricultural resources? What could you do at home to reduce your demand on our resources?

8.  Describe two consequences of increasing levels of carbon dioxide.

9.  Describe three ways humans have negatively impacted the carbon cycle.

Chemistry Unit - Knowledge Topics

1.  Particle theory

2.  Classification of matter

3.  Physical and chemical properties

4.  The concept of density and its formulas

5.  Atomic models

6.  Current atomic model (protons, neutrons and electrons table)

7.  Organization of the periodic table (groups, periods)

8.  Trends of the periodic table and properties of groups

9.  Gas tests

10.  STSE – independent, and controlled variables, qualitative versus quantitative observations

ChemistryUnit – Skills questions

1.  A chocolate bar has the following dimensions: width 6.5cm, length 20 cm, height 3.5 cm. The total mass of the bar is 55 g. What is the density of the chocolate bar in g/cm3? Make sure to use the GRASP method.

2.  An irregularly shaped rock has a mass of 120 g. When placed in a can of water, it displaces 85 mL of water. Find the density of the rock. Make sure to use the GRASP method.

3.  Classify the following substances as either a(n) element, compound, solution, or heterogenous mixture (mechanical mixture) and state your reason why: Table salt (NaCl), Pepper and water, Beryllium, Carbon dioxide (CO2), Pizza, ketchup, coffee

4.  Use your periodic table to complete the following chart. (recopy the table onto your lined paper)

Element Name / Mass Number / Standard Atomic Notation / Number of Protons / Number of Neutrons / Number of electrons
Sodium
Potassium
Neon

5.  Write the name of the element and the symbol for each of the following: (recopy the table onto your lined paper)

Name / Symbol
a) the element with atomic number 13
b) a noble gas
c) a halogen element
d) an alkali metal

6.  Draw a Bohr-Rutherford diagram for: Carbon (C), Neon (Ne), and Magnesium (Mg).

7.  Explain the trends that happen in the periodic table as:

a)  you move down a group

b)  you move across a period

Electricity Unit - Knowledge Topics

1.  Laws of electric charges.

2.  Conductors and Insulators.

3.  Charging by Friction, Contact, and Induction.

4.  Coulombs, current, voltage, and resistance.

5.  3 Components of circuits.

6.  Measuring voltage and current in a circuit. (ammeters and voltmeters)

7.  Ohm’s Law formula and concepts. (Using GRASP)

8.  Voltage and current relationships in series and parallel circuits (Vt, V1, V2, It…)

9.  Effect of wire length and thickness of resistance

Electricity Unit - Skills questions

1.  Describe what is happening in the

following diagram. Name the type

of charging that occurs.

2.  If a material comes into contact with the sphere of a charged electroscope with raised leaves and the leaves of the electroscope fall, what can you determine about the material? Explain your answer.

3.  Would you expect these two objects to

attract each other or repel each other?

Explain your answer.

4.  Use the electrostatic series shown here to

predict the charge of each object if

A) a rubber balloon is rubbed against human hair.

B) cat hair is rubbed with wool.

5.  What would you expect to happen

to the sphere in this picture when the

negatively charged bar is brought into

contact with it? What is the name for this occurrence?

6.  Use charge movement to describe how an object can become positively charged.

7.  a) Sketch a circuit diagram showing a battery, an open switch, and two light bulbs (1 and 2) connected in parallel. An ammeter is also connected into this circuit.
b) If V1 = 6 V, It = 3 A, and I1 = 1 A . Find Vt, I2, and R1. Show the formula you used to solve for each.

8.  a) Sketch a circuit diagram showing a AC-source, a closed switch, and two lamps (1 and 2) and a resistor (3) connected in series. A voltmeter is reading the resistor’s voltage drop.
b) If Vt = 12 V, V1 = 2 V, V2 = 6 V and It = 3 A. Find V3, I2, and R2. Show the formula you used to solve for each.

9.  Summarize how connecting multiple loads in series affects the total resistance and current in a circuit.

10.  Why do you think turning on a hairdryer sometimes can cause other devices in your home, such as lights or your television, to turn off?

11.  Sometimes very long extension cords may become hot when being used. What causes this and why is it a problem? Suggest two ways to lessen the problem?

12.  A clothes dryer has a resistance of 18 Ω. What current will it draw if it is powered by a 220 V source? Use GRASP to solve.

13.  A radio powered by a 3 V battery draws a current of 1.5 A. What is the resistance of the radio? Use GRASP to solve.

Space Unit - Knowledge Topics

1.  Energy Source

2.  Big Bang Theory and evidence

3.  Properties of planets (atmosphere and distinguishing characteristics)

4.  Formation and life cycle of stars

5.  Comets, Meteors etc. (see this note)

6.  Galaxies

7.  ______

8.  ______

9.  ______

10.  ______