This reviewer covers the DepEd MELC-aligned Grade 3 Science competencies. Read each section, study the tables, and remember the exam hacks.
Matter and Its Properties
Matter is anything that takes up space and has mass. The three states are solid, liquid, and gas.
| State | Shape | Example |
|---|---|---|
| Solid | Fixed | Ice, rock |
| Liquid | Takes container shape | Water, juice |
| Gas | Spreads out | Air, steam |
Heating can change a solid to a liquid (melting) and a liquid to a gas (evaporation). Cooling reverses these changes.
Living Things and Their Environment
Plants and animals have parts with special functions and live in habitats that meet their needs. Living things grow, reproduce, and respond to their surroundings.
Force, Motion, and Energy
A force is a push or a pull that can make things move, stop, or change direction. Energy comes from the sun, food, and electricity, and gives us light, heat, and sound.
Earth and the Environment
Soil, water, rocks, and air are natural resources we must protect. Observe the weather and learn to keep the surroundings clean.
Not all changes in matter are reversible. Burning paper or cooking an egg is a permanent change — you cannot get the original back.