GRADE 7-SCIENCE
Quiz by Mercy Paglinawan
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- Q1
A student adds spoonfuls of sugar to a glass of cold water while stirring.
Spoon 1-3: Sugar disappears.
Spoon 4: Sugar grains settle at the bottom and do not disappear even with stirring.
Scientifically, why did the sugar stop dissolving?
The solvent cannot dissolve more solute at this temperature.
The sugar is too heavy.
The water is full of sugar.
The solution reached saturation.
300s - Q2
A student tests three liquids using blue litmus paper.
Vinegar contains acidic properties.
Acidic solutions turn blue litmus red.
Vinegar is sour and strong.
Vinegar is a colored liquid.
300s - Q3
Saltwater is boiled in a pot until all the water is gone. White crystals remain at the bottom.
What does this prove about saltwater?
It leaves white dust.
It is dirty water.
It is a mixture of substances.
Mixtures can be separated by physical changes.
300s - Q4
A student views a letter "e" under a compound microscope.
Actual Object: "e"
Image Seen: "ə" (Upside down and reversed)
Why does the image appear inverted?
The microscope flips the image.
Convex lenses refract light causing inversion.
The slide is upside down.
Lenses bend light rays.
300s - Q5
Compare the diagrams of two cells.
Cell A: Rectangular shape, large vacuole, thick outer layer.
Cell B: Irregular round shape, small vacuoles.
It is a box shape.
It has a hard shell.
The cellulose wall provides structural rigidity.
It has a cell wall.
300s - Q6
A runner breathes heavily after a race. Oxygen moves from the lungs----->blood -----> muscle cells.
Why do the muscle cells need this oxygen?
To help the runner breathe.
To cool the body down.
To convert nutrients into energy (ATP).
To keep the cells alive.
300s - Q7
Context: A diagram shows the levels of biological organization:
Cell ------> Tissue -------> Organ ---------> Organ System -------> Organism
Why is this organization important for survival?
Organs work together.
The parts are connected.
It makes animals big.
Specialized parts cooperate for complex functions.
300s - Q8
A car travels along a straight road.
Time 0s: Speed is 0 m/s.
Time 5s: Speed is 10 m/s.
Time 10s: Speed is 20 m/s.
Scientifically, describe the car's motion.
The car is fast.
The car is undergoing constant acceleration.
The velocity is increasing.
The car is speeding up.
300s - Q9
A student walks 5 meters North, stops, and walks 5 meters South (back to the start).
He didn't go anywhere.
The position did not change.
Displacement considers direction and start-point.
He is back at the start.
300s - Q10
An alarm clock is placed inside a sealed glass jar. When the air is pumped out (creating a vacuum), the ringer is seen vibrating, but no sound is heard.
Why is the sound silent?
The glass blocks it.
The clock is broken.
Sound needs air to move.
Mechanical waves require a medium to propagate.
300s - Q11
A metal spoon and a plastic spoon are placed in a cup of hot water. The handle of the metal spoon feels hot quickly.
Why does the metal heat up faster?
High thermal conductivity transfers energy rapidly.
Metal is strong.
Metal gets hot easily.
Metal conducts heat well.
300s - Q12
Study the map coordinates. A typhoon is located at 15°N Latitude, 121°E Longitude.
Why is it important to use both Latitude and Longitude?
To find the typhoon.
To see the map lines.
Intersection of lines gives an absolute location.
To know the direction.
300s - Q13
The Philippines is near the equator. We receive direct rays from the sun almost all year round.
How does this affect our climate?
Direct solar rays result in high heat intensity.
The temperature is high.
It is always bright.
We have many beaches.
300s - Q14
Diagram of a Solar Eclipse: Sun — Moon — Earth. The Moon blocks the view of the Sun.
Only the Umbra (dark shadow) covers a specific area.
The moon's shadow is small.
The sun is too high.
The sky is cloudy there
300s - Q15
A graph shows the "Greenhouse Effect." Heat enters the atmosphere, but some is trapped by gases like Carbon Dioxide (CO2).
What happens if CO2 levels increase too much?
The air gets dirty.
The Earth gets warmer.
More heat is trapped, causing global warming.
It gets harder to breathe.
300s
