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Grade 10 Science | Samacheer Kalvi aligned preview

Horizon CLEAR-5 Sample Pack

This static sample shows how Horizon turns textbook concepts into simple explanations, analogies, exam wording, and worksheet practice that parents and teachers can inspect.

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Physics | Laws of Motion

Question: A force of 50 N acts on a body of mass 10 kg. Find the acceleration produced.

Traditional classroom wording

Use Newton's second law. Force is equal to mass into acceleration. Substitute the values in the formula.

Horizon CLEAR-5 answer

Simple idea: Acceleration means how quickly speed changes. A stronger push gives more acceleration.

Analogy: The same push moves an empty trolley faster than a loaded trolley.

Working: F = m x a, so a = F / m = 50 / 10 = 5.

Final answer: 5 m/s^2

Chemistry | Atoms and Molecules

Question: Calculate the number of moles present in 44 g of carbon dioxide. (C = 12, O = 16)

Traditional classroom wording

Find the molecular mass of carbon dioxide. Number of moles is given mass divided by molecular mass.

Horizon CLEAR-5 answer

Simple idea: A mole is like a counting packet in chemistry. To find moles, divide given mass by molar mass.

Analogy: Just like 12 items make one dozen, 44 g of CO2 makes one mole of CO2.

Working: Molar mass of CO2 = 12 + (2 x 16) = 44 g. Moles = 44 / 44 = 1.

Final answer: 1 mole

Physics + Chemistry | More CLEAR-5 Examples

Question 1

A resistor of 5 ohm carries a current of 2 A. Find the potential difference.

Simple idea: Voltage is the push that moves charge. Current is charge flow, and resistance opposes the flow.

Working: V = I x R = 2 x 5 = 10.

Final answer: 10 V
Question 2

Identify the type of reaction: Zn + CuSO4 -> ZnSO4 + Cu.

Simple idea: Zinc is more reactive than copper, so zinc takes copper's place.

Exam wording: Zinc displaces copper from copper sulphate.

Final answer: Displacement reaction

Worksheet Practice

State Newton's second law of motion.
Calculate acceleration when force is 80 N and mass is 20 kg.
Define one mole in chemistry.
Find potential difference when I = 2 A and R = 5 ohm.
Identify the reaction type: Zn + CuSO4 -> ZnSO4 + Cu.

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