Spiral High

29/06/2026

ENVIRONMENTAL SCIENCE 7
TERM 1: WEEK 3-4
TOPIC 3: ECOSYSTEM

29/06/2026

ENVIRONMENTAL SCIENCE 7
TERM 1: WEEK 2-3
TOPIC 2: BIOMES

29/06/2026

ENVIRONMENTAL SCIENCE 7 -STEM
TERM 1: WEEK 2-3
TOPIC 1: ECOLOGICAL CONCEPTS

15/06/2026

Environmental Science
STE 7
Term 1 - Week 1
Introduction to Environmental Science

14/06/2026

13/06/2026

Check out what's new in the 3 Term Curriculum of the Department of Education and how it benefits our Science Class.

09/01/2026

SCIENCE 9 MELCS
Quarter 3
Topic: CLIMATIC PHENOMEMON - LA NINA

La Niña is the opposite climatic disturbance to El Niño. This natural phenomenon may but does not always follow El Niño events. It may last for nine to twelve months but in some cases, it lasts for two years.

This event is triggered by the cooling of the eastern part of the Pacific Ocean. Trade winds that move from east to west are strengthened.

Moving air brings along too much water v***r. Areas that experienced severe drought which was caused by El Niño may encounter above normal rainfall. But in some cases, areas that experience dry season will be drier than normal conditions. La Niña’s effects are the opposite of El Niño.

08/01/2026

SCIENCE 9 MELCS
Quarter 3
Topic: CLIMATIC PHENOMEMON - EL NINO

El Niño is a lengthy warming in the eastern part of the Pacific Ocean. This natural phenomenon occurs at irregular intervals of two to seven years and lasts for nine months or two years at most.

Normally, as trade wind moves from east to west, it collects warm air. But when trade winds is weakened, it causes the piling up of warm surface water and making the part of the Pacific Ocean warmer leading to El Niño phenomenon.
This happens when the upwelling of colder water is blocked by the large quantities of warm surface water. El Niño will most likely bring severe drought. It is believed that it causes stronger thunderstorm disturbance and massive storms. It also causes the decrease of the population of some species.

08/01/2026

SCIENCE 9 MELCS
Quarter 3
Topic: CLIMATIC PHENOMEMON - GLOBAL WARMING

Global warming is caused by several factors such as man-made, anthropogenic, or natural. One example of natural causes is the released of methane
gas from arctic tundra and wetlands. Burning fossil fuels is one of the man-made
causes of global warming resulting to pollution. When fossil fuel is burned it gives off carbon dioxide.

EFFECTS OF GLOBAL WARMING
Global warming can bring sea level to rise due to the MELTING OF ICE CAPS AND GLACIERS. Consequently, people may experience severe weather disturbances like STRONG TYPHOONS, HEAVIER RAINFALLS, and CLIMATE CHANGE.

Normally, sunlight enters the earth’s atmosphere, absorbed and then reradiated by back into space.
However, because of the greenhouse effect where the earth’s atmosphere is accumulating additional greenhouse gases and trapping the earth’s infrared radiation from leaving into space raises the earth’s temperature and causes climate change.

08/01/2026

SCIENCE 9 MELCS
Quarter 3
Topic: CLIMATIC PHENOMEMON - GREENHOUSE EFFECT

Greenhouse Effect is the natural warming process of the Earth that results when gases in the atmosphere trap heat from the earth that would otherwise escape into space. Sunlight makes the earth habitable.

While 30 percent of the solar energy that reaches our world is reflected back to space, approximately 70 percent passes through the atmosphere to the earth’s surface, where it is absorbed by the land, oceans, and atmosphere, and heats the planet.

This heat is then radiated back up in the form of invisible infrared radiation. While some of this infrared radiation continues on into space, the vast majority—indeed, some 90 percent—gets absorbed by atmospheric gases, known as GREENHOUSE GASES, and redirected back toward the earth, causing further warming.

**Greenhouse gases are:
a. carbon dioxide – absorbs the least amount of energy
b. Methane
c. nitrous oxide
d. hydro fluorocarbons (HFCs)
e. per fluorocarbons (PFCs)
f. sulfur hexafluoride
g. Water v***r.

These gases can be naturally occurring, or man-made.