Year 10 ICAS Science 5-Question Sample

Question 1 of 5 Earth and beyond

A radio signal travels from a spacecraft to Earth at about 300000 km/s. What is the closest one-way signal time?

Spacecraft signal delay

Quantity	Value
Distance from Earth	12 million km
Signal speed	300000 km/s
Question	one-way travel time

A 0.7 s B 3600000 s C 0 s D 40 s

Question 2 of 5 Observing and measuring

Which report best matches the measuring scale and the observed meniscus position?

Graduated cylinder reading

Observation	Detail
Smallest scale division	1 mL
Meniscus position	halfway between 43 mL and 44 mL
Required report	reading with sensible uncertainty

A 43 mL exactly B 44 mL, with uncertainty about +/-5 mL C 43.5 L, with uncertainty about +/-0.5 L D 43.5 mL, with uncertainty about +/-0.5 mL

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 prevented heat loss from the surface. B Higher wind speed increased 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 Conductivity increases as dissolved-solids level increases in these samples. D The sample with the lowest dissolved-solids level has the highest conductivity.

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	6

A 248 B 84 C 8 D 1485

Year 10 Science sample

Answer the sample questions