Grade 8 Science Review
DepEd MELC-Based Quarterly Exam Reviewer
Total: 104 questions across 4 quarters
Choose Your Quarter
Select a quarter to start practicing. Each quiz covers specific topics from the DepEd curriculum.
Quarter 1: Matter, Mixtures & Solutions
Particle model of matter, elements and compounds, mixtures, solutions, acids and bases
TOPICS COVERED:
- •Particle Model of Matter
- •Elements and Compounds
- •Mixtures and Solutions
- •Acids and Bases
- •pH Scale and Indicators
Quarter 2: Force, Motion & Energy
Newton's Laws, motion, forces, work, power, energy types, simple machines
TOPICS COVERED:
- •Newton's Laws of Motion
- •Force and Friction
- •Work and Power
- •Kinetic and Potential Energy
- •Simple Machines
Quarter 3: Living Things & Environment
Cell structure, heredity, genetics, ecosystems, food chains and webs
TOPICS COVERED:
- •Cell Structure and Function
- •Eukaryotic vs Prokaryotic Cells
- •Heredity and Genetics
- •Ecosystems and Communities
- •Food Chains and Food Webs
Quarter 4: Earth & Space Science
Earthquakes, volcanoes, plate tectonics, weather, climate, celestial bodies
TOPICS COVERED:
- •Earthquakes and Seismic Waves
- •Volcanoes and Plate Tectonics
- •Weather and Climate
- •Typhoons and Atmospheric Phenomena
- •Celestial Bodies and Solar System
Grade 8 Science Learning Milestones
Key skills your child should master throughout the school year:
| Skill | Quarter | Description |
|---|---|---|
| Particle model of matter | Q1 | Explain states of matter using particle theory |
| Acids, bases, and pH | Q1 | Identify substances using indicators and pH scale |
| Newton's Laws of Motion | Q2 | Apply the three laws to real-world situations |
| Work, power, and energy | Q2 | Calculate work done and energy transformations |
| Simple machines | Q2 | Identify and explain mechanical advantage |
| Cell structure | Q3 | Compare prokaryotic and eukaryotic cells |
| Heredity and genetics | Q3 | Understand Mendelian inheritance patterns |
| Ecosystems | Q3 | Analyze food chains, webs, and energy flow |
| Plate tectonics | Q4 | Explain earthquakes and volcanic activity |
| Weather and climate | Q4 | Differentiate weather patterns and climate zones |
Quarter-by-Quarter Learning Guide
Q1: Matter, Mixtures & Solutions (Chemistry)
- • Explain matter using the particle model
- • Distinguish elements, compounds, and mixtures
- • Understand solutions, solutes, and solvents
- • Identify acids and bases using indicators
- • Use the pH scale to classify substances
Q2: Force, Motion & Energy (Physics)
- • Apply Newton's Three Laws of Motion
- • Calculate force, friction, and net force
- • Understand work, power, and energy
- • Differentiate kinetic and potential energy
- • Explain mechanical advantage in simple machines
Q3: Living Things & Environment (Biology)
- • Compare prokaryotic and eukaryotic cells
- • Identify cell organelles and their functions
- • Understand heredity and Mendelian genetics
- • Analyze ecosystems and ecological relationships
- • Trace energy flow through food chains and webs
Q4: Earth & Space Science
- • Explain plate tectonics and its effects
- • Understand earthquake causes and seismic waves
- • Describe volcanic activity and types
- • Differentiate weather and climate
- • Identify celestial bodies and their movements
Tips for Parents: Supporting Grade 8 Science Learning
Do's
- ✓Encourage hands-on experiments at home (safe chemistry, physics demos)
- ✓Relate science to Philippine context (typhoons, earthquakes, biodiversity)
- ✓Watch science documentaries together and discuss
- ✓Visit science museums or nature parks when possible
- ✓Help connect concepts across quarters (chemistry in biology, physics in earth science)
Don'ts
- ✗Don't let them memorize without understanding concepts
- ✗Avoid skipping lab activities - they reinforce learning
- ✗Don't dismiss their science questions - explore answers together
- ✗Avoid teaching outdated information - science updates constantly
- ✗Don't separate science from other subjects - it's interconnected
Recommended Weekly Study Schedule
Monday
Chemistry & Matter Review
Tuesday
Physics & Force Practice
Wednesday
Biology & Cells Study
Thursday
Earth Science Topics
Friday
Integration & Review
Recommended: 45-60 minutes daily, with hands-on activities on weekends
Frequently Asked Questions
What topics are covered in Grade 8 Science?
Grade 8 Science covers four main areas: Matter, Mixtures & Solutions (Q1 - Chemistry), Force, Motion & Energy (Q2 - Physics), Living Things & Environment (Q3 - Biology), and Earth & Space Science (Q4). These integrate concepts from all science branches.
What is the particle model of matter?
The particle model explains that all matter is made of tiny particles (atoms and molecules) that are constantly moving, have spaces between them, and attract each other. This model explains states of matter, diffusion, and dissolution.
What are Newton's Three Laws of Motion?
1st Law (Inertia): Objects stay at rest or in motion unless acted upon by a force. 2nd Law (F=ma): Force equals mass times acceleration. 3rd Law (Action-Reaction): For every action, there is an equal and opposite reaction.
What is the difference between eukaryotic and prokaryotic cells?
Prokaryotic cells (bacteria) lack a nucleus and membrane-bound organelles. Eukaryotic cells (plants, animals, fungi) have a true nucleus enclosed by a nuclear membrane and contain organelles like mitochondria and endoplasmic reticulum.
How do earthquakes occur?
Earthquakes occur when tectonic plates move, collide, or slide past each other, releasing stored energy as seismic waves. The Philippines sits on the Pacific Ring of Fire, making it prone to earthquakes.
What is the pH scale and why is it important?
The pH scale (0-14) measures acidity and alkalinity. pH 7 is neutral, below 7 is acidic, above 7 is basic/alkaline. Understanding pH helps in chemistry, biology (blood pH), agriculture (soil), and environmental science.
Is Grade 8 Science aligned with DepEd MELC curriculum?
Yes, all questions in this reviewer are aligned with the Department of Education Most Essential Learning Competencies (MELC) for Grade 8 Science, covering all four quarters of the school year.
How can I improve my understanding of Grade 8 Science?
Connect concepts across subjects (physics affects biology, chemistry explains earth processes). Do hands-on experiments, watch educational videos, and relate science to daily life experiences in the Philippines.
Explore Other Grade Levels
About Grade 8 Science
This reviewer covers the complete Grade 8 Science curriculum based on DepEd's Most Essential Learning Competencies (MELC). Topics include matter and particles, forces and motion, living things and genetics, and Earth and space science.
Each quarter explores different branches of science, from chemistry and physics to biology and earth science, building a comprehensive understanding of scientific concepts.
Note: Questions are designed as single-word terminology to help you master scientific vocabulary and concepts efficiently.