# SCI10_4Q_M1_Q1

## Quiz by Marvin Velasco

Science
Philippines Curriculum: Grades K-10 (MELC)

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10 questions
• Q1

Jane can still pump air in the party balloon even though it is already inflated. What explains this phenomenon?

Balloons look better if their size is bigger.

Balloons are made up of plastic.

Air molecules can be compressed.

The air inside the balloon is hot.

45s
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• Q2

What happens to the lungs of a scuba diver as it moves closer to the seafloor?

The lungs expand.

The lungs compress.

The lungs explode.

There is no change in the lungs.

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• Q3

Which phenomenon best illustrates Charles’ Law?

Leavening agent causing the fluffiness of cake products

Breathing apparatus being used by a patient

Carbon dioxide is dissolved in water.

Expansion of the balloon as it is being submerged in hot water

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• Q4

Records show that the incidence of tire explosion is high during the summer season. Which of the following gives the best explanation for this observation?

There is too much air inside the tires.

High temperature during the summer season causes the air inside the tire to expand.

There are more travelers during summer vacation.

Vehicles’ tires are not well maintained.

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• Q5

If the temperature of a fixed quantity of gas decreases and the pressure remains unchanged,

its volume is unchanged.

its volume is neglected.

its volume increases.

its volume decreases.

45s
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• Q6

How can you possibly prove that gases have negligible mass?

Support your claim through an equation.

Put a balloon in a digital balance before and after you fill it with air.

Ask two persons to hold a box filled with air.

Feel the weight of the samples on both hands.

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• Q7

What is NOT an assumption of the kinetic molecular theory to the motion of the gas?

It moves in random motions.

It moves in a straight-line motion.

It moves in a curved path.

It moves in a constant motion.

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• Q8

Which is an assumption of the kinetic molecular theory?

The particles of gas collide and emit energy to the surroundings.

The particles of gas have a distinct volume measured in mL.

The particles of gas attract one another via intermolecular forces.

The speed of the particles in a gas is directly proportional to the Kelvin temperature.

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• Q9

A gas occupies a volume of 2.0 L at a pressure of 1.0 atm. If the volume of the gas decreases to half of its original value, what is its new pressure if the temperature remains unchanged?

1.0 atm

2.0 atm

0.5 atm

1.5 atm

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• Q10

The pressure of a gas is kept constant. If the initial temperature is doubled, what will happen to the volume it occupies?

Nothing will change in the volume.

It will be the same value as the pressure.

It will be doubled.

It will decrease to half of its original value.

45s
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