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WorksheetsVolcanic Activity and Safety (1–12)
Total questions: 100
Worksheet time: 53mins
What is a volcano?
A hole in the ground where water flows
A vent where molten rock, ash, and gases escape
A mountain with snow
A crack where plants grow
What is molten rock inside the Earth called?
Lava
Magma
Ash
Soil
What do we call molten rock that reaches the surface?
Lava
Magma
Ash
Sediment
Which Philippine agency monitors volcanoes?
PAGASA
PHIVOLCS
DENR
DOST
Which is NOT a volcanic material?
Lava
Ash
Ballistic projectiles
Rainwater
Which type of eruption is the most violent?
Which Philippine volcano is known for its perfect cone?
A. Mayon Volcano
B. Taal Volcano
C. Pinatubo
D. Kanlaon
Which volcano erupted in 1991 and affected the global climate?
Mayon
Taal
Pinatubo
Bulusan
Why should people follow PHIVOLCS Alert Levels?
To know daily weather
To know safety steps before, during, and after eruptions
To learn new science
To measure earthquakes
Which material from volcanoes can make fertile soil?
Lava and ash
Smoke
Ballistic projectiles
Gas
Why are volcanoes dangerous to nearby communities?
They create fertile fields
They may erupt unpredictably with lava, ash, and gas
They attract tourists
They are tall mountains
Which is the safest action during a volcanic eruption?
Stay near crater for photos
Evacuate when told by authorities
Swim in rivers nearby
Ignore warnings
How many seasons does the Philippines have?
2
3
4
5
What causes seasons in the Philippines?
Shape of the Earth
Revolution of the Earth around the Sun
Clouds in the sky
Mountains blocking winds
Which season is from June to November in the Philippines?
Dry season
Wet/rainy season
Summer
Snowy
Which months are usually dry season?
Dec–May
Jan–July
June–Oct
March–Sept
Which agency provides weather forecasts in the Philippines?
PHIVOLCS
PAGASA
DENR
DOH
What season is best for harvesting rice in the Philippines?
Wet season
Dry season
Both seasons
Which factor affects climate in the Philippines?
Winds and monsoons
Earthquakes
Volcanoes only
Mountains
Amihan refers to:
Southwest monsoon (rainy)
Northeast monsoon (cool, dry)
Hot summer winds
Storm winds
Habagat refers to:
Southwest monsoon (rainy)
Northeast monsoon (dry)
Typhoon
El Niño
Why do farmers plan planting schedules according to seasons?
To avoid floods and typhoons
To maximize water during wet season and dry time for harvest
To follow traditions only
To match holidays
How long does the Earth take to rotate once?
12 hours
24 hours
30 days
365 days
Earth’s rotation causes:
Seasons
Day and night
How long does the Earth take to revolve around the Sun?
1 day
30 days
365 days
100 years
Earth’s revolution causes:
Seasons
Day and night
Typhoons
Earthquakes
What shape is Earth’s orbit around the Sun?
Perfect circle
Oval/ellipse
Straight line
Spiral
What tool can be used to demonstrate Earth’s rotation?
Globe
Telescope
Microscope
Compass
When the Northern Hemisphere tilts toward the Sun, it experiences:
Winter
Summer
Autumn
Rainy season
What causes day and night?
Earth’s revolution
Earth’s rotation on axis
Sun’s movement
Moon’s orbit
When the Earth is farthest from the Sun, it is called:
Aphelion
Perihelion
Equinox
Solstice
Which two motions of Earth explain most natural patterns?
Rotation and revolution
Orbit and tilt
Eclipse and tides
Monsoon and typhoon
What are constellations?
Groups of planets
Patterns of stars in the sky
Moons around Earth
Clouds at night
Which constellation looks like a hunter?
Orion
Ursa Major
Scorpius
Cassiopeia
Which constellation points to the North Star?
Orion
Big Dipper
Cassiopeia
Leo
Polaris is also called:
Morning star
North Star
Evening star
Shooting star
How did ancient people use constellations?
For games
For directions and calendars
For making fire
For earthquakes
What do we call the apparent movement of stars across the night sky?
Rotation of Earth
Revolution of Earth
Actual star movement
Tilt of Earth
What constellation resembles a scorpion?
Orion
Ursa Minor
Scorpius
Cassiopeia
Which constellation resembles a “W” shape?
Orion
Cassiopeia
Leo
Hydra
Why do some constellations appear only in certain seasons?
Stars move
Earth revolves, changing our view of the night sky
Moon blocks stars
Atmosphere hides them
What are solar and lunar eclipses examples of?
Random events
Predictable patterns
Weather changes
What is a solar eclipse?
Earth blocks the Moon’s light
Moon blocks Sun’s light
Stars disappear
Clouds block Sun
What is a lunar eclipse?
Moon hides Sun
Earth’s shadow covers Moon
Stars vanish
Clouds cover Moon
Which model demonstrates day and night?
Sun-Earth-Moon globe model
Telescope
Compass
Microscope
What is the importance of predictable natural patterns?
They make life difficult
They help people plan activities and safety
They cause disasters
They stop seasons
Why did ancient Filipinos study constellations?
To play
To mark planting and harvesting times
To find food in forests
To stop rain
What are examples of predictable weather patterns?
Monsoons and seasons
Earthquakes
Volcano eruptions
Typhoons only
Which tool is used today to study eclipses safely?
Telescope with solar filter
Sunglasses
Naked eyes
Microscope
Why is it important to learn about stability and change in Earth’s systems?
To predict natural events and prepare for them
To stop climate change
To make more stars
To avoid sunlight
Why are volcanic soils fertile despite the dangers of eruptions?
They are mixed with ocean water
They contain minerals from volcanic ash and lava
They are rich in salt
They contain frozen gases
Which material ejected by volcanoes can cause roofs to collapse?
Magma
Volcanic ash
Steam
Gases
What should people do when PHIVOLCS raises Alert Level 4 for a volcano?
Continue normal activities
Evacuate immediately
Plant crops
Visit the crater for photos
Which is NOT a benefit of volcanoes?
Fertile soil
Geothermal energy
Ash clouds improving breathing
Tourism
Why should people stay away from river valleys during eruptions?
To avoid seeing the eruption
Lahars or mudflows may flow through them
They may get lost
Air is too cold
Which of these is an example of a long-term volcanic hazard?
Lava flows
Ashfall
Fertile farmland
Pyroclastic flows
Which Philippine volcano is located inside a lake?
Mayon
Taal
Kanlaon
Pinatubo
Which eruption in 1991 caused global cooling for nearly two years?
Mayon
Kanlaon
Taal
Pinatubo
Why does PHIVOLCS monitor ground swelling of volcanoes?
To check earthquake faults
To detect magma rising beneath the surface
To measure rainfall
To predict seasons
Which volcanic product is most dangerous to lungs when inhaled?
Lava
Ash
Steam
Which is a community preparedness measure before eruptions?
Stockpiling masks, water, and emergency kits
Visiting craters for inspection
Burning ash to remove it
Ignoring warnings
Why is geothermal energy abundant in the Philippines?
It is near oceans
It is part of the Pacific Ring of Fire with many volcanoes
It has many forests
It has long coastlines
Which season is linked to planting rice in the Philippines?
Dry season
Wet season
Summer
Winter
Why is the Philippines not experiencing four distinct seasons like countries in temperate zones?
It is near the equator
It is a small country
It has many mountains
It is surrounded by oceans
Why is Amihan season cooler and drier?
Winds come from the northeast carrying cold air
Winds come from the south with moisture
Earth is tilted
Storms arrive
Which natural event can disturb the normal wet and dry seasons?
(a)
Which months usually mark the wet season in the Philippines?
December–May
June–November
March–August
April–October
How do farmers benefit from knowing seasonal changes?
They can predict earthquakes
They can plan planting and harvesting
They can prevent volcanic eruptions
They can count stars
Why do typhoons often occur during wet season?
The Sun is weaker
Warm oceans fuel storms
Winds stop blowing
Earth rotates slower
Which monsoon brings heavy rains to the Philippines?
Amihan
Habagat
Both
None
Why do people schedule festivals during the dry season?
To avoid heavy rain disrupting activities
To make it hotter
To match school schedules
To prevent earthquakes
Which season is ideal for drying crops like corn or tobacco?
Wet season
Dry season
Winter
Spring
What does Earth’s tilt cause?
A. Day and night
B. Seasons
C. Tides
D. Volcanoes
Why is day longer during summer?
Earth is closer to Sun
The hemisphere is tilted toward the Sun
Sun moves faster
Moon reflects more light
Why do we see different constellations at different times of the year?
Stars move
Earth revolves around the Sun
Moon blocks stars
Clouds cover stars
How long is one Earth revolution?
1 day
30 days
365 days
12 hours
If Earth stopped rotating, what would immediately change?
No more day and night cycle
No more seasons
No more volcanoes
No more oceans
Which event happens when Earth’s axis is tilted neither toward nor away from the Sun?
Solstice
Eclipse
Equinox
Which motion explains why the Sun appears to rise in the east?
Earth’s revolution
Earth’s rotation
Earth’s tilt
Moon’s orbit
Why do leap years occur?
Earth rotates slowly
Earth takes about 365¼ days to revolve
Earth is tilted
Earth’s orbit is circular
When Earth is at perihelion, what does it mean?
It is farthest from the Sun
It is closest to the Sun
It has no tilt
It spins faster
What natural event is directly related to Earth’s revolution?
Typhoons
Seasons
Day and night
Earthquakes
Why did ancient sailors use constellations?
For entertainment
For navigation at sea
For predicting eruptions
For counting years
Which constellation is visible in the Philippines during summer nights?
Orion
Scorpius
Which constellation is prominent in summer skies?
Cassiopeia
Scorpius
Ursa Major
Cassiopeia
Which constellation contains the belt of three stars?
Cassiopeia
Orion
Scorpius
Leo
Why is Polaris useful for navigation?
It changes position each season
It always points near the North Pole
It is the brightest star
It is the farthest star
Which is an example of a seasonal constellation?
Orion visible in December
Polaris all year
Sun
Moon
How do constellations help farmers?
By telling time of day
By marking planting and harvesting seasons
By predicting rainfall daily
By guiding earthquakes
Which constellation has a scorpion-like curve?
Cassiopeia
Leo
Scorpius
Orion
Why do constellations seem to move during the night?
Stars actually move quickly
Earth rotates on its axis
Moon blocks stars
Clouds push stars
What does it mean if a star is part of a zodiac constellation?
It is used in horoscopes
It lies along Earth’s orbital path (ecliptic)
It is the brightest
It changes color
What causes a lunar eclipse?
Earth blocks Sun’s light from reaching the Moon
Moon blocks Sun’s light from Earth
Clouds cover Moon
Stars hide behind Earth
What causes a solar eclipse?
Moon blocks sunlight reaching Earth
Earth blocks sunlight from Moon
Sun stops shining
Stars move
Why don’t eclipses happen every month?
The Moon’s orbit is tilted
The Earth spins too fast
The Sun moves
The stars block sunlight
Which event marks the longest day of the year?
Vernal equinox
Summer solstice
Winter solstice
Lunar eclipse
Which event marks equal day and night?
Summer solstice
Winter solstice
Equinox
Eclipse
Why do we experience predictable eclipses?
Sun and Moon move randomly
Orbits follow predictable patterns
Clouds cover sky
Stars guide the Moon
Why is it important to study indigenous knowledge about constellations?
For cultural preservation and practical use in farming/navigation
For fortune telling
For creating myths
For predicting earthquakes
Which natural event is an example of stability in Earth’s system?
Regular rising of the Sun daily
Sudden volcanic eruption
Earthquake
Typhoon
