Science 6: Matter, Energy & Earth Systems — Sample Exam
Parent / teacher answer keyOriginal Grade 6 home-study paper with complete supplied scenarios, calculations, and scientific explanation. It samples the course and does not replace review of the investigation notebook.
8 questions · 24 points · suggested 45 minutes
Student instructions
- Work independently after agreeing timing and access support with a parent; record any support used.
- All scenario numbers and records are illustrative. Use the stated assumptions and do not invent missing data.
- Use the reference relationships below and a basic calculator when helpful. Show a calculation, retain units, and explain what it means.
- For concept questions, connect a claim with the relevant mechanism or evidence and a specific limit. A supported alternative can satisfy the criteria.
- Keep the answer key and lesson models closed during an independent attempt. Discuss corrections after human marking.
- Use saved investigation plans, observations, revised models, projects, and an oral conference as additional assessment evidence.
Measurement and model relationships
| Relationship | How to use it |
|---|---|
| Length | 10 mm = 1 cm; 100 cm = 1 m |
| Mass and volume | 1,000 g = 1 kg; 1,000 mL = 1 L |
| Mean | Sum comparable values and divide by their count |
| Density | Mass ÷ volume; preserve units such as g/mL or g/cm³ |
| Percentage | Part ÷ stated whole × 100; identify the denominator |
| Change/rate | Ending minus starting value; divide a stated change by its time interval |
| Tidal range | High water minus low water with the same reference |
| Space scale | Actual stated distance ÷ actual km per model cm |
| Energy account | Include relevant stores and transfers; °C is not a joule value |
Coverage and marks
| Chapter | Questions | Points |
|---|---|---|
| Chapter 1 · Inquiry, Measurement & Models | 1 | 3 |
| Chapter 2 · Matter, Mixtures & Water Properties | 2 | 3 |
| Chapter 3 · Energy, Heat & Thermal Design | 3 | 3 |
| Chapter 4 · Electricity, Magnetism & Light | 4 | 3 |
| Chapter 5 · Earth Systems, Plates & Earth Materials | 5 | 3 |
| Chapter 6 · Water, Air, Weather & Climate | 6 | 3 |
| Chapter 7 · Ecosystems, Watersheds & Conservation | 7 | 3 |
| Chapter 8 · Earth, Moon, Sun & Space Models | 8 | 3 |
Name: ____________________ Date: ____________________
Question 1 · 3 points
A ruler’s start is 2.2 cm and end 9.0 cm. Find length in cm/mm and explain why the physical ruler edge need not be zero.
Question 2 · 3 points
A mixture contains 40 g water, 3 g dissolved salt, and 7 g sand. The model removes all sand and later evaporates all water. Account for final destinations and reject a destroyed-water claim.
Question 3 · 3 points
A model receives 90 J and gives 18 J light plus 72 J thermal output. Calculate light fraction and explain why a lighting loss is not destroyed energy.
Question 4 · 3 points
A ray has 45° incidence from the normal at an ideal plane mirror. Give reflection angles from normal/surface and explain how rough paper remains visible.
Question 5 · 3 points
Marker separation grows from 120 to 132 cm over six years. Calculate mean relative rate and explain why it is not a clock for the next earthquake.
Question 6 · 3 points
Matched long-period seasonal means rise from 10.5 to 11.2 °C. A chilly afternoon is recorded. Explain the difference, scale, and why neither record alone establishes the cause.
Question 7 · 3 points
Oxygen samples are 5, 6, 7 mg/L. Find the mean and explain why a missing next sample is not zero and a clear appearance is not drinking certification.
Question 8 · 3 points
At 1 cm per 5,000,000 km, a supplied 75,000,000 km separation is drawn as 15 cm. Check it and explain why a much enlarged planet symbol needs a separate label.