Science Unit 3, Change ⏱ ~40 min Unit Quiz

Unit Quiz

Test everything you have learned across all 15 lessons. This cumulative quiz covers the entire unit with 15 multiple-choice and 5 short-answer questions.

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L1: What Is Change in Matter?L2: Physical Change vs Chemical ChangeL3: Particle Model of Physical ChangeL4: Evidence of Chemical ReactionsL5: Change Synthesis and Checkpoint 1 PreparationL6: Heating, Cooling and Change of StateL7: Dissolving, Solutions and Separating MixturesL8: Conservation of Mass in ChangesL9: Reactions in Everyday LifeL10: Investigating Change SafelyL11: Variables in Change InvestigationsL12: Collecting and Interpreting Reaction DataL13: Modelling Chemical ChangeL14: Change in Natural and Human SystemsL15: Unit Synthesis and Depth Study Preparation

Multiple Choice (15 questions)

1. Which of the following is an example of matter?

AA shadow
BA cloud
CA sound wave
DA rainbow

2. Which of the following is a physical change?

ABurning wood
BRusting iron
CMelting butter
DBaking a cake

3. According to the particle model, what happens to particles when a solid melts?

AThey break apart into atoms
BThey gain energy and move more freely
CThey stop moving completely
DThey turn into a new substance

4. Which of the following is a product in a chemical reaction?

AA starting material
BA substance that is used up
CA substance that is formed
DA catalyst

5. Which of the following is a physical change?

ABurning paper
BMelting wax
CRusting iron
DBaking bread

6. What happens to the temperature of pure ice while it is melting?

AIt keeps rising
BIt stays at 0 degrees Celsius
CIt drops below zero
DIt jumps to 100 degrees Celsius

7. In a saltwater solution, which is the solvent?

ASalt
BWater
CAir
DSand

8. According to the law of conservation of mass, what happens to mass during a chemical reaction in a closed system?

AIt increases
BIt decreases
CIt stays the same
DIt turns into energy

9. Which gas is produced during photosynthesis?

ACarbon dioxide
BNitrogen
COxygen
DHydrogen

10. What does a risk assessment help you do?

AMake experiments more exciting
BIdentify hazards and decide how to reduce risk
CAvoid writing anything down
DSkip safety equipment

11. In an experiment to see how the amount of bicarb soda affects the height of a volcano reaction, what is the independent variable?

AThe height of the reaction
BThe amount of bicarb soda
CThe temperature of the room
DThe type of vinegar used

12. Which of the following is qualitative data?

A25 seconds
B5 grams
CBlue colour
D100 millilitres

13. What is the main purpose of a scientific model?

ATo copy reality exactly
BTo simplify and explain complex ideas
CTo replace all experiments
DTo prove a hypothesis is correct

14. Which process removes carbon dioxide from the atmosphere?

ARespiration
BCombustion
CPhotosynthesis
DDecomposition

15. Which of the following best describes a depth study?

AA short quiz on one topic
BAn extended investigation into a scientific question
CA summary of a textbook chapter
DA list of definitions to memorise

Short Answer (5 questions)

SA1

Define 'matter' and give two examples from your kitchen. (2 marks)

Write your answer in your book.
SA2

Define 'reactant' and 'product' and explain how they relate to a chemical reaction. (2 marks)

Write your answer in your book.
SA3

Define 'solute', 'solvent', and 'solution' using an everyday example. (2 marks)

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SA4

Explain the difference between a hazard and a risk, giving one example of each from a science lab. (2 marks)

Write your answer in your book.
SA5

Explain why models are useful but also limited when representing chemical change. (2 marks)

Write your answer in your book.

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