حل امتحان ساينس لغات الدقهلية للصف الثالث الإعدادي 2026 الترم الثاني
يوفر «شبابيك» إجابات امتحان مادة Science بمحافظة الدقهلية للصف الثالث الإعدادي لغات للفصل الدراسي الثاني 2025-2026، وذلك لمساعدة الطلاب على مراجعة الحلول النموذجية والتأكد من إجاباتهم بعد انتهاء الامتحان.
إجابات امتحان مادة Science بمحافظة الدقهلية للصف الثالث الإعدادي لغات للفصل الدراسي الثاني 2025-2026
The Second Question
(A) Choose the correct answer
1) The genetically modified rice contains:
Carotene substance
2) On adding sodium chloride solution to silver nitrate solution, a precipitate is formed:
White
3) In the opposite figure, if the current intensity = 4 ampere, the potential at point X equals:
Using Ohm's Law:
V = I × R
V = 4 × 5 = 20 volt
Answer: 20 volt
(B) The opposite graph represents a chemical reaction
1) After the end of the reaction, the ratio between concentration of substances A and C respectively equals:
A : C = 0.08 : 0.16
= 1 : 2
2) If a catalyst is used
The new graph reaches the final concentration faster than the original curve while maintaining the same final concentrations.
3) Write the balanced chemical equation
A + B → C
(According to the symbols shown in the graph)
(C) In the reaction:
2NH₃ + 3Br₂ → N₂ + 6HBr
1) Detect:
Oxidizing agent: Br₂
Reducing agent: NH₃
2) Complete the Punnett Square
|
|
B |
b |
|---|---|---|
|
B |
BB |
Bb |
|
b |
Bb |
bb |
Genotypes:
- BB = 25%
- Bb = 50%
- bb = 25%
The Third Question
(A) Write the scientific term
1) The quantity of charge transferred by a current intensity of one ampere in one second.
Coulomb
2) The arrangement of metallic elements in descending order according to their chemical activity.
Electrochemical series
3) Special organs in the human body secrete hormones directly into the blood.
Endocrine glands
(B) Give reason1) Most metals are reducing agents while most nonmetals are oxidizing agents.
Because metals tend to lose electrons, while nonmetals tend to gain electrons.
2) The nuclei of stable elements are coherent despite the presence of repulsion forces.
Because nuclear forces bind protons and neutrons together inside the nucleus.
3) DNA is a source of hereditary traits.
Because it carries genetic information responsible for inherited characteristics.
(C) Study the reactions
1) Write the chemical formula
A = C₆H₁₂O₆ (Glucose)
E = O₂
2) Determine the reaction type
Reaction (1): Photosynthesis
Reaction (2): Decomposition reaction
Reaction (3): Single displacement reaction
The Fourth Question
(A) Cross the odd word
1) Skin colour / Number of fingers / Learning of walking / Blood group
Odd word:
Learning of walking
Relation:
The others are inherited traits.
2) Iridium / Rubidium / Palladium / Platinum
Odd word:
Rubidium
Relation:
The others are transition elements.
3) Second / Joule / Coulomb / Volt
Odd word:
Second
Relation:
The others are electrical units.
(B) What are the results of
1) Increasing the length of the rheostat wire
Resistance increases, so current intensity decreases.
2) Decreasing secretion of thyroxin hormone
Causes goiter and reduced metabolic rate.
3) Adding diluted hydrochloric acid to silver
No reaction occurs because silver is less reactive than hydrogen.
(C) Calculations
1) Calculate the amount of charge
Given:
Current = 2 A
Time = 7 minutes
Q = I × t
Q = 2 × (7 × 60)
Q = 840 coulomb
2) When the key (K) is opened
The voltmeter reading V₁ equals the electromotive force of the cell connected to it.
