Science>Year 10>Unit 4>Checkpoint 1

Checkpoint 1

This checkpoint tests Block A, Climate Science: weather vs climate, natural climate variation, the natural and enhanced greenhouse effect, and the evidence for human-caused climate change.

SC5-ES-01Lessons 1-410 MC3 Short AnswerCheckpoint 1 of 3
CP1

Coverage

This checkpoint assesses your understanding of how the climate system works and how we know it is changing.

Lesson 1

Weather vs climate: climate as a long-term average; Australian climate diversity.

Lesson 2

Natural climate variation: Milankovitch cycles, ice cores and proxy records.

Lesson 3

The greenhouse effect: natural vs enhanced; key greenhouse gases and feedbacks.

Lesson 4

Evidence for human-caused change: Keeling Curve, ice cores, ¹³C fingerprint, attribution.

Checkpoint Standard Strong answers use precise scientific language and connect evidence to conclusions.
MC Score
0 / 10
SA Score
0 / 12
Multiple Choice
Q

Test Your Understanding

UnderstandBand 3

1. Climate is best defined as:

AWhat the weather is doing today
BThe long-term average weather of a region, typically over 30 years or more
CA single extreme weather event such as a heatwave
DThe temperature forecast for the coming week
UnderstandBand 3

2. Which of the following is a CLIMATE statement rather than a weather statement?

A"It is 32 °C in Sydney today"
B"A thunderstorm is forecast this afternoon"
C"Sydney receives on average about 1,200 mm of rain per year"
D"There is a cold snap across NSW this week"
ApplyBand 4

3. Coastal Sydney has milder, wetter conditions than inland Alice Springs. The MAIN factor causing this difference is:

ASydney is much closer to the equator
BDistance from the ocean: Sydney is coastal (maritime), Alice Springs is far inland (continental)
CAlice Springs is at a much higher altitude
DSydney produces more pollution that traps heat
UnderstandBand 4

4. Which of the following is a NATURAL cause of long-term climate change?

ABurning coal in power stations
BClearing forests for farmland
CMilankovitch cycles, slow changes in Earth's orbit and tilt
DDriving petrol cars
UnderstandBand 4

5. Ice cores are useful to climate scientists because they:

ATrap tiny air bubbles that record the atmosphere's composition going back hundreds of thousands of years
BShow exactly what tomorrow's weather will be
CContain fossils of dinosaurs
DMeasure the speed of ocean currents today
UnderstandBand 3

6. Which statement about the NATURAL greenhouse effect is correct?

AIt is caused only by human activity
BIt makes Earth too cold for life
CIt has no effect on Earth's temperature
DIt keeps Earth about 33 °C warmer than it would otherwise be, making life possible
UnderstandBand 4

7. Which of the following gases is NOT a significant greenhouse gas?

ACarbon dioxide (CO₂)
BNitrogen (N₂), which makes up about 78% of the atmosphere
CMethane (CH₄)
DWater vapour (H₂O)
UnderstandBand 4

8. The ENHANCED greenhouse effect is mainly caused by:

AExtra greenhouse gases added by burning fossil fuels
BThe Sun suddenly becoming much hotter
CA hole forming in the ozone layer
DEarth moving closer to the Sun
AnalyseBand 5

9. Which single piece of evidence most directly shows that the extra atmospheric CO₂ comes from fossil fuels rather than natural sources?

AGlobal temperatures have risen by about 1.1 °C
BSea levels are rising
CThe falling ¹³C/¹²C ratio in atmospheric CO₂ matches the isotopic signature of fossil fuels
DSummers feel hotter than they used to
AnalyseBand 5

10. Ice cores show that during natural glacial cycles, CO₂ changed by about 100 ppm over roughly 10,000 years. The Keeling Curve shows a rise of about 140 ppm since the 1800s. The best conclusion is that:

AThe current rise is normal because climate always changes
BNatural cycles prove the current rise is also natural
CCO₂ has been higher before, so today's level is not a concern
DThe current rise is roughly 60 to 70 times faster than natural cycles, unprecedented in the 800,000-year record
Short Answer
✍

Short Answer Questions

UnderstandBand 3

11. Explain the difference between weather and climate, and explain why climate data must be collected over at least 30 years to be meaningful. 4 MARKS

Answer in your book.
ApplyBand 4

12. Distinguish between the natural and the enhanced greenhouse effect. In your answer, name two greenhouse gases and identify the main human activity responsible for the enhanced effect. 4 MARKS

Answer in your book.
AnalyseBand 5

13. A friend says, "The climate has always changed naturally, so humans cannot be causing it." Using TWO pieces of scientific evidence, explain why scientists are confident that recent warming is human-caused. 4 MARKS

Answer in your book.

Review & Reflect

✓ I can explain...

  • The difference between weather and climate
  • Natural causes of climate change such as Milankovitch cycles
  • The difference between the natural and enhanced greenhouse effect
  • How ice cores and the Keeling Curve provide evidence
  • Why the ¹³C fingerprint points to fossil fuels

⚠ I need to review...

  • Naming the main greenhouse gases
  • Why the rate of CO₂ rise matters, not just the amount
  • How attribution models test natural vs human causes
  • Australian climate examples (maritime vs continental)
  • Reading and describing trends in climate graphs

Mark checkpoint as complete

Tick when you have finished all questions and reviewed your answers.

Unit overview · Science subject page · Unit quiz