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American National Curriculum

Grade 9

Solution for Grade 9

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CONTENTS LIST OF EXPERIMENTS Praticals should be conducted alongside the concepts taught in theory classes. (LIST OF EXPERIMENTS) 1. Preparation of:

a true solution of common salt, sugar and alum

Topic:

Biology

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transparency filtration criterion stability Preparation of a) a mixture b) a compound using iron filings and sulphur powder and distinction between these on the basis and altwilk in water and of: (i) appearance, i.e., homogeneity and heterogeneity (ii) behaviour towards a magnet. (iii) behaviour towards carbon disulphide as a solvent (iv) effect. of heat

Iron with copper sulphate solution in water
Burning of magnesium ribbon in air
Zinc with dilute sulphuric acid
Heating of copper sulphate crystals
Sodium sulphate with barium chloride in the form of their solutions in water.

Topic:

Biology

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60 km

straight road, a bus travels the first

30 km

with a uniform speed of

30 kmh^{- 1}

. Howfast must the bus travel the next

30 km

so as to have average speed of

40 kmh^{- 1}

for the entire trip? 7. A ball thrown vertically upwards with a speed of

19.6 ms^{- 1}

from the top of a tower returns to the earth in 6 seconds. Find the height of the tower.

(g = 9.8 ms^{- 2})

8. A bullet initially moving with a velocity of

20 m / s

strikes a target and comes to rest after penetrati a distance of

0.01 m

in the target. Calculate the retardation produced by the target.

Topic:

Physics

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6 The map below shows a weather variable recorded at the same time across the United States. According to the data on the map, which weather variable was most likely recorded?

wind speed in knots
air pressure in millibars
rainfall in inches in the last 6 hours
air temperature in degrees Fahrenheit

Topic:

Biology

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2 The image below shows the near-Earth asteroid Itokawa. Which surface feature would be created if Itokawa hit Earth's surface?

volcanic crater
impact crater
mountain valley.
rift valley

Topic:

Biology

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3 The north end of Earth's axis of rotation points toward

Alpha Centauri
Polaris
Betelgeuse
Spica

Topic:

Biology

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What is the approximate percentage of Earth's surface that is covered by the hydrosphere?

$10%$
$70%$
$50%$
$90%$

Topic:

Biology

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Marco has experienced extreme fatigue (tiredness) lately. He eats three balanced meals each day and exercises 2-3 times per week on his Peloton bike. He gets 7-8 hours of sleep each night, but just can't seem to stay awake during the day. Which organelle is most likely causing Marco's problems? Explain your reasoning and provide evidence from the symptoms to support your answer.

Topic:

Transformations in Organisms and Ecosystems

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Mei started feeling sick at school and the school nurse called her mom and suggested that they come by the clinic. Mei tested positive for the Influenza virus. She will need to allow her body to fight off the infection. In order to fight it, she would need to make antibodies, which are a specific type of protein. List (IN ORDER) at least 4 organelles that this macromolecule will pass through before being released from the cell.

Topic:

Transformations in Organisms and Ecosystems

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Question 10

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Using the diagram, identify and describe each layer and convection IN YOUR OWN WORDS. (Hint: Number 1 is a chemical layer) Level 1 - Correctly identify each layer (1-8) along with saying which layers are chemical and physical.

{"Level 2 - Describe the physical and chemical properties of each layer IN YOUR OWN WORDS.","Level 3 - Identify which layers have convection. Explain the evidence scientists have discovered that supports this.","Level 4 - In a paragraph, predict what will happen in the future when Earth's interior cools. What will change about Earth?","rade Report"}

Topic:

Human Activity and Climate

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Question 11

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Sokct the correct answer Read the excerpt and the dictionary entry tor the word influence (15) I was grieved and offended at the time, but I can understand now the influence primarily working against Boston. Influence noun 1. an effect of something or someone on another 2. corrupt interterefice for personal gain 3. power due to ability, position or wealth 4. an ethereal fluid affecting someone's actions Which definition is correct for how inffuence is used in this sentence?

definition 1
definition 4
definition 3
definition 2

Topic:

Wave Properties

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Question 12

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Which of the followitg statements about the Safe Drinking Water Act is TRUE?

{"A The law was parsed in 1965","B It allowed states to set their own standards for drinking water","C It required the EPA to determine the maximum contaminant levels for drinking water","D This law established the Environmental Protection Agency."}

Topic:

Energy

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Question 13

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ASsIETMMENT 4.2: FOIL CHEM RXN'S Predict the products: 24pts

$HCl_{(aq)} + AgNO_{3 (aq)} \to$
$CaCl_{2 (a q)} + Na_{3} PO_{4 (a q)} \to$
$Pb (NO_{3})_{2 (aq)} + BaCl_{2 (aq)} \to$
$FeCl_{3 (aq)} + NaOH_{(aq)} \to$
$H_{2} SO_{4 (aq)} + NaOH_{(aq)} \to$
$KOH_{(aq)} + CuSO_{4 (aq)} \to$

Topic:

Energy

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Question 14

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ASsIETMMENT 4.2: FOIL CHEM RXN'S Predict the products: 24pts

$HCl_{(aq)} + AgNO_{3 (aq)} \to$
$CaCl_{2 (a q)} + Na_{3} PO_{4 (a q)} \to$
$Pb (NO_{3})_{2 (aq)} + BaCl_{2 (aq)} \to$
$FeCl_{3 (aq)} + NaOH_{(aq)} \to$
$H_{2} SO_{4 (aq)} + NaOH_{(aq)} \to$
$KOH_{(aq)} + CuSO_{4 (aq)} \to$

Topic:

Energy

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Question 15

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ASsIETMMENT 4.2: FOIL CHEM RXN'S Predict the products: 24pts

$HCl_{(aq)} + AgNO_{3 (aq)} \to$
$CaCl_{2 (a q)} + Na_{3} PO_{4 (a q)} \to$
$Pb (NO_{3})_{2 (aq)} + BaCl_{2 (aq)} \to$
$FeCl_{3 (aq)} + NaOH_{(aq)} \to$
$H_{2} SO_{4 (aq)} + NaOH_{(aq)} \to$
$KOH_{(aq)} + CuSO_{4 (aq)} \to$

Topic:

Energy

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Question 16

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What does the following symbol represent?

{Battery,Resistor,Wire,Switch}

Topic:

Electricity and Magnetism

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Question 17

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If a person is constantly feeling weak and has low energy levels, a doctor may test the blood for lactate. High lactate levels may indicate that the person's body is breaking down glucose by fermentation instead of by aerobic respiration. The diagram below represents the process of fermentation. Based on the diagram, which of the following statements best explains why an increase in fermentation and a decrease in aerobic respiration might cause a person to feel weak and have low energy levels?

Less ATP is being produced.
Less pyruvate is being produced.
The amount of lactate available as a product is limited.
The amount of glucose available as a reactant is limited.

Topic:

Matter and Energy

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Question 18

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7. Label the diagram with the following words:

CO_{2}

H_{2} O

O_{3}

, Calvin Cycle, Light-dependent reactions

Topic:

Matter and Energy

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Question 19

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Comparing a one and two-bulb circuit, which one will have the highest current? they will have equal currents two-bulb circuit there is not enough information one-bulb circuit Previous

Topic:

Electricity and Magnetism

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Question 20

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Determine what state you would be in if you traveled to the given latitude and longitude coordinates.

$2 5^{\circ} N, 10 5^{\circ} W$
: $2 1^{\circ} N, 8 9^{\circ} W$
: $2 0^{\circ} N, 10 5^{\circ} W :$
$3 0^{\circ} N, 11 0^{\circ} W$
: $1 7^{\circ} N, 9 7^{\circ} W$
: $2 8^{\circ} N, 10 5^{\circ} W$ :

Topic:

Energy

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