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Year 8 Science sample

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Question 1 of 5 Observing and measuring

A rain gauge at a farm weather station carries numbered lines every 10 mm, with 5 equal small gaps between one numbered line and the next. The water sits 3 small marks above the 20 mm line. What is the reading?

Reading the marksrain gaugenext numbered linelevel sits herelower numbered linenumbered every 10 mm5 small gaps between themlevel is 3 marks upThe lower numbered line reads 20 mm.Work out what one short mark stands for before you read anything.
Question 2 of 5 Natural and processed materials

Four samples were weighed and their volumes measured during a kitchen bench trial. They are then dropped one at a time into cooking oil, which has a density of 0.92 g for every cubic centimetre. Which sample floats?

Mass and volume of each sample
SampleMassVolume
the cork disc6 g30 cm3
the rubber bung33 g30 cm3
the steel washer40 g5 cm3
the wax lump48 g50 cm3
Question 3 of 5 Earth and beyond

The shadow of a letterbox post at a street in Hobart was measured five times in one day. The post stands 110 cm tall. At which of those times was the Sun more than 45 degrees above the horizon?

Shadow length through the day
TimeShadow length
9 am280 cm
11 am160 cm
1 pm88 cm
4 pm205 cm
6 pm380 cm
Question 4 of 5 Energy and change

Four nylon strings on a school guitar in the music room are stretched to the same tightness and differ only in the length free to vibrate. Which pair sounds exactly one octave apart?

The four strings
StringLength free to vibrateWire
string W60 cmnylon
string X45 cmnylon
string Y40 cmnylon
string Z30 cmnylon
Question 5 of 5 Investigating

A temperature sensor is being set up at a shade sail over a childcare sandpit. The class wants to find out whether the shade sail cools the air the children play in. Where should the sensor sit?

Choosing where the sensor sits
Placement is part of the design, not a detail to fix later.
  1. The question asks about whether the shade sail cools the air the children play in
  2. A sensor reports the temperature of whatever it touches or sits in
  3. Direct sunlight on a sensor warms the sensor itself
  4. A reading from outside the space answers a different question
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