Matter questions

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Matter question collection

Review Matter questions for Physics, with correct answers shown and coverage across particle models of solids, liquids and gases; density calculations; changes of state.

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Question 1

During a physical change like melting, what quantity stays the same before and after?
  1. Mass
  2. Temperature
  3. State of matter
  4. Chemical composition

Question 2

Compared to gases, how are the particles in a solid arranged?
  1. Packed closely together and vibrate in place
  2. Farther apart and move randomly
  3. In straight lines at high speed
  4. Completely stationary

Question 3

What does Brownian motion show about particles in a gas?
  1. They move randomly and collide with moving dust particles
  2. They stay still until heated
  3. They spin like electrons
  4. They evaporate instantly

Question 4

Which process is an example of diffusion?
  1. Perfume spreading through air
  2. Water boiling in a kettle
  3. Magnet sticking to a fridge
  4. A car accelerating on a road

Question 5

Which equation defines density \(\rho\)?
  1. \(\rho = \frac{m}{V}\)
  2. \(\rho = mV\)
  3. \(\rho = \frac{V}{m}\)
  4. \(\rho = m + V\)

Question 6

If a block has mass \(3\,\mathrm{kg}\) and volume \(0.50\,\mathrm{m}^3\), what is its density?
  1. \(6\,\mathrm{kg/m^3}\)
  2. \(1.5\,\mathrm{kg/m^3}\)
  3. \(2\,\mathrm{kg/m^3}\)
  4. \(10\,\mathrm{kg/m^3}\)

Question 7

Inside a material, what store holds the energy of particles' motion and positions?
  1. Internal energy
  2. Chemical potential
  3. Kinetic electricity
  4. Pressure

Question 8

Which equation gives the energy for a change of state?
  1. \(E = mL\)
  2. \(E = mc\Delta \theta\)
  3. \(E = mgh\)
  4. \(E = P t\)

Question 9

What happens to the internal energy of ice as it melts into water?
  1. It increases while the temperature stays constant
  2. It drops to zero
  3. It stays constant and the temperature falls
  4. It turns into mass

Question 10

What does specific heat capacity measure?
  1. Energy needed to raise \(1\,\mathrm{kg}\) of a substance by \(1\,\mathrm{°C}\)
  2. Mass lost during heating
  3. Temperature change per second
  4. Number of particles

Question 11

Which change conserves both mass and chemical composition?
  1. Evaporation of water
  2. Burning paper
  3. Iron rusting
  4. Baking a cake

Question 12

When water condenses, what happens to the energy stored by the particles?
  1. It decreases and is transferred to the surroundings
  2. It increases
  3. It stays trapped inside the droplets
  4. It turns into magnetic energy

Question 13

Why does diffusion happen faster at higher temperatures?
  1. Particles move faster and collide more often
  2. The medium becomes solid
  3. Gravity becomes stronger
  4. Materials gain extra mass

Question 14

When a solid melts, what happens to the spacing between particles?
  1. It increases
  2. It stays the same
  3. It decreases
  4. Particles disappear

Question 15

Which state has particles sliding past each other while still touching?
  1. Liquid
  2. Solid
  3. Gas
  4. Plasma

Question 16

How does temperature affect internal energy of a fixed mass?
  1. Higher temperature means more internal energy
  2. Temperature has no effect
  3. Lower temperature means more energy
  4. Internal energy becomes zero always

Question 17

Which process is reversible without changing substances?
  1. Freezing and melting
  2. Burning
  3. Rusting
  4. Baking

Question 18

What happens to density when a gas is compressed to a smaller volume?
  1. It increases
  2. It decreases
  3. It stays the same
  4. It becomes negative

Question 19

Which term describes materials that keep their mass during heating?
  1. Conservation of mass
  2. Mass creation
  3. Mass elimination
  4. Mass explosion

Question 20

Why is the particle model useful?
  1. It explains changes of state and density differences
  2. It predicts asteroids
  3. It calculates energy bills
  4. It shows chemical reactions only

Question 21

A metal block has mass \(2.4\,\mathrm{kg}\) and volume \(0.80\,\mathrm{m}^3\). What is its density?
  1. \(3\,\mathrm{kg/m^3}\)
  2. \(0.30\,\mathrm{kg/m^3}\)
  3. \(3000\,\mathrm{kg/m^3}\)
  4. \(2.4\,\mathrm{kg/m^3}\)

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Review Matter questions for Physics, with correct answers shown and coverage across particle models of solids, liquids and gases; density calculations; changes of state.

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