Year 9 Science Practice Tests Flashcards

Flashcards for Year 9 Science Practice Tests on Atomic Structure, Chemistry, Light, Sound, and Electricity.

What is the charge of a neutron?

0

What does the atomic number of an element represent?

Protons

Which particle has the highest penetrating power?

Gamma

Define isotope.

Atoms of the same element with different numbers of neutrons.

A reaction absorbs heat. Is it endothermic or exothermic?

Endothermic

Which type of wave does NOT need a medium to travel?

Light

The part of a wave where particles are close together is called what?

Compression

In an electric circuit, what is the current measured in?

Amperes (Amps)

Which of the following best describes a parallel circuit?

Multiple branches for current

What is the speed of light in a vacuum?

3 × 10⁸ m/s

Define Wavelength.

Distance between two corresponding points on a wave.

Define Frequency.

Number of waves passing a point per second (Hz)

Define Amplitude.

Maximum height from rest position

Why does light travel faster than sound?

Light travels faster as an electromagnetic wave needing no medium; sound needs a medium.

How should a voltmeter be connected in a circuit?

Voltmeter must be connected in parallel, not series.

If a sound wave has a frequency of 440 Hz and a wavelength of 0.78 m, what is its speed? (v = f × λ)

v = f × λ = 440 × 0.78 = 343.2 m/s

In a series circuit with 3 bulbs, one burns out. Explain what happens to the rest of the circuit

Entire circuit breaks, all bulbs go out.

Write the word equation for the reaction between hydrochloric acid and Magnesium.

Hydrogen Chloride + Magnesium -> Magnesium Chloride + Hydrogen