Year 11 ICAS Science 5-Question Sample

Question 1 of 5 Earth and beyond

Use the scale model. What real distance is represented?

Scale model

Scale rule	Diagram distance
1 cm represents 5 million km	10 cm

A 15 million km B 2 million km C 50 million km D 500 million km

Question 2 of 5 Observing and measuring

Which interpretation of the repeated measurements is best?

Repeated measurements

Sensor	Trial 1	Trial 2	Trial 3
A	76	76	77
B	61	69	70
Accepted value	65	65	65

A Sensor A is more accurate because its readings are close to each other. B Sensor B is more precise because it has the wider spread. C Sensor A is more precise but less accurate than Sensor B. D Both sensors have the same accuracy because both were used three times.

Question 3 of 5 Predicting and concluding

Which conclusion is best supported by the cooling observations?

Cooling observations

Wind speed	Skin-surface temperature after 5 min
low	26 degrees C
medium	21 degrees C
high	16 degrees C

A Higher wind speed increased heat loss from the surface. B Higher wind speed prevented heat loss from the surface. C Wind speed had no effect because all temperatures were measured after 5 minutes. D The low-wind trial had the greatest heat loss because its final temperature was highest.

Question 4 of 5 Interpreting

The graph shows dissolved-solids level and electrical conductivity for five water samples. Which interpretation is best supported?

A Conductivity decreases as dissolved-solids level increases. B The graph proves every dissolved solid is safe to drink. C The sample with the lowest dissolved-solids level has the highest conductivity. D Conductivity increases as dissolved-solids level increases in these samples.

Question 5 of 5 Life and living

Use the mark-recapture data. Which population estimate is closest?

Mark-recapture survey

Marked first time	Second sample size	Marked in second sample
45	33	7

A 85 B 10 C 212 D 1485

Year 11 Science sample

Answer the sample questions