Year 9 Science · Unit 4 · Lesson 20

Unit 4 Synthesis — Waves and Motion

Foundation Worksheet

Name

Date

Class

Learning Goals

Recall key vocabulary from across the whole of Unit 4.
Organise unit concepts into the four major themes: Waves & Sound, Light & EM Spectrum, Motion & Graphs, Forces & Newton's Laws.
Demonstrate broad understanding of the unit as a whole.

Warm Up

Fill the gap

Choose the correct word from the word bank to complete each sentence. Two words in the bank will not be used.

wave longitudinal frequency electromagnetic displacement acceleration balanced evidence amplitude friction

A transfers energy from one place to another without permanently transferring matter. Sound is a wave because the particles vibrate in the same direction as the wave travels.

The number of waves that pass a point per second is called , measured in hertz (Hz). Visible light is part of the spectrum, which requires no medium to travel.

The vector quantity that describes how far an object has moved from its starting point, and in which direction, is called . When a net unbalanced force acts on an object, it causes — a change in speed or direction.

When the forces on a stationary object are , it remains at rest. In science, conclusions must be supported by gathered through repeatable experiments or reliable sources.

Your Turn

Sort it!

Write each concept from the pool into the correct theme box. Each concept belongs in exactly one box.

Amplitude Decibel (dB) Radio waves Law of reflection Distance-time graph Speed = distance ÷ time Newton's First Law Terminal velocity Wave equation v = fλ Pitch and loudness X-rays (medical imaging) Refraction Gradient of v-t graph Unbalanced forces Transverse wave Ultraviolet hazards

Waves & Sound

Light & EM Spectrum

Motion & Graphs

Forces & Newton's Laws

Show What You Know

1. Write the wave equation and state what each symbol stands for. Then calculate the speed of a wave with frequency 200 Hz and wavelength 1.5 m.

Recall 2 marks

2. State Newton's First Law in your own words and give one everyday example from Unit 4.

Recall 2 marks

Wrap Up

Name one concept from Unit 4 that surprised you or that you found most interesting. Explain briefly why.