Grade 9 Science Review
DepEd MELC-Based Quarterly Exam Reviewer
Total: 132 questions across 4 quarters
Choose Your Quarter
All 4 quarters now available! Select a quarter below to start practicing. Each quiz features 20 randomized questions per session.
Quarter 1: Matter & Chemical Reactions
Atomic structure, periodic table, chemical bonding, reactions
TOPICS COVERED:
- •Atomic Structure
- •Periodic Table
- •Chemical Bonding
- •Types of Chemical Reactions
- •Balancing Equations
Quarter 2: Living Things & Environment
Cell division, genetics, heredity, evolution, ecology
TOPICS COVERED:
- •Cell Division (Mitosis & Meiosis)
- •Genetics and Heredity
- •DNA and RNA
- •Evolution and Natural Selection
- •Ecological Relationships
Quarter 3: Force, Motion & Energy
Work, power, energy, waves, electricity, magnetism
TOPICS COVERED:
- •Work, Power, and Energy
- •Waves and Sound
- •Light and Optics
- •Electricity and Circuits
- •Magnetism and Electromagnetism
Quarter 4: Earth & Space
Climate, weather systems, astronomy, universe
TOPICS COVERED:
- •Climate and Weather Systems
- •Stars and Galaxies
- •Solar System
- •Universe and Cosmology
- •Space Exploration
Grade 9 Science Learning Milestones
Key skills your child should master throughout the school year:
| Skill | Quarter | Description |
|---|---|---|
| Atomic structure | Q1 | Understand protons, neutrons, electrons, and orbitals |
| Chemical bonding | Q1 | Distinguish ionic, covalent, and metallic bonds |
| Balancing equations | Q1 | Balance chemical equations using coefficients |
| Cell division | Q2 | Compare mitosis and meiosis processes |
| Genetics and heredity | Q2 | Use Punnett squares for trait prediction |
| Evolution | Q2 | Explain natural selection and adaptation |
| Energy transformations | Q3 | Calculate work, power, and energy |
| Waves and light | Q3 | Understand wave properties and optics |
| Electricity | Q3 | Analyze circuits and calculate electrical quantities |
| Astronomy | Q4 | Describe stars, galaxies, and the universe |
Quarter-by-Quarter Learning Guide
Q1: Matter & Chemical Reactions (Chemistry)
- • Describe atomic structure (protons, neutrons, electrons)
- • Interpret the periodic table and element properties
- • Explain ionic, covalent, and metallic bonding
- • Identify types of chemical reactions
- • Balance chemical equations accurately
- • Predict products of chemical reactions
Q2: Living Things & Environment (Biology)
- • Compare mitosis and meiosis processes
- • Use Punnett squares for genetic predictions
- • Explain DNA structure and function
- • Describe natural selection and evolution
- • Analyze ecological relationships
- • Understand population dynamics
Q3: Force, Motion & Energy (Physics)
- • Calculate work, power, and energy
- • Describe wave properties (amplitude, frequency)
- • Explain light behavior and optics
- • Analyze electrical circuits (series, parallel)
- • Apply Ohm's Law to calculations
- • Describe electromagnetism
Q4: Earth & Space Science
- • Explain climate patterns and weather systems
- • Describe star formation and life cycles
- • Compare planets in the solar system
- • Discuss galaxies and the universe
- • Analyze evidence for the Big Bang
- • Explore space exploration achievements
Tips for Parents: Supporting Grade 9 Science Learning
Do's
- ✓Encourage safe chemistry experiments at home (kitchen science)
- ✓Watch science documentaries about genetics, space, and physics
- ✓Discuss Philippine biodiversity and environmental issues
- ✓Use stargazing apps to explore astronomy
- ✓Connect science to career opportunities (engineering, medicine)
Don'ts
- ✗Don't memorize without understanding the "why"
- ✗Avoid skipping lab activities and experiments
- ✗Don't treat science branches as separate - they connect
- ✗Avoid dismissing "why" questions - explore together
- ✗Don't skip problem-solving practice in physics and chemistry
Recommended Weekly Study Schedule
Monday
Chemistry & Equations
Tuesday
Biology & Genetics
Wednesday
Physics & Calculations
Thursday
Earth & Space Science
Friday
Integration & Review
Recommended: 60 minutes daily, with lab activities or experiments on weekends
Frequently Asked Questions
What topics are covered in Grade 9 Science?
Grade 9 Science covers four main areas: Matter & Chemical Reactions (Q1 - Chemistry), Living Things & Environment (Q2 - Biology), Force, Motion & Energy (Q3 - Physics), and Earth & Space Science (Q4). These provide deeper understanding of scientific concepts.
What is the difference between mitosis and meiosis?
Mitosis produces 2 identical diploid cells for growth and repair. Meiosis produces 4 different haploid cells (gametes) for sexual reproduction. Mitosis has 1 division; meiosis has 2 divisions with crossing over.
How do you balance chemical equations?
Balance equations by adjusting coefficients (not subscripts) so atoms of each element are equal on both sides. Start with elements appearing once, then balance hydrogen and oxygen last. Check your work by counting atoms.
What are the types of chemical bonds?
Ionic bonds: transfer of electrons between metals and nonmetals. Covalent bonds: sharing of electrons between nonmetals. Metallic bonds: sea of electrons shared among metal atoms. Bond type affects substance properties.
What is natural selection and how does it work?
Natural selection is the process where organisms with favorable traits survive and reproduce more successfully. It requires variation, inheritance, competition, and differential survival. Over generations, it leads to adaptation and evolution.
What is the electromagnetic spectrum?
The electromagnetic spectrum includes all types of electromagnetic radiation ordered by wavelength/frequency: radio waves, microwaves, infrared, visible light (ROYGBIV), ultraviolet, X-rays, and gamma rays.
Is Grade 9 Science aligned with DepEd MELC curriculum?
Yes, all 132 questions in this reviewer are aligned with the Department of Education Most Essential Learning Competencies (MELC) for Grade 9 Science, covering all four quarters of the school year.
How can I prepare for Grade 9 Science exams?
Focus on understanding concepts rather than memorizing. Practice balancing equations, Punnett squares for genetics, and energy calculations. Connect concepts across quarters - chemistry explains biology, physics explains earth processes.
Explore Other Grade Levels
About Grade 9 Science
This reviewer covers the complete Grade 9 Science curriculum based on DepEd's Most Essential Learning Competencies (MELC). Topics include chemistry, biology, physics, and earth science.
Grade 9 Science provides advanced understanding of scientific concepts preparing students for specialized science courses in Senior High School.
Note: Each quiz features 20 randomized questions per session to ensure varied practice and comprehensive coverage.