2023 Year 8 Science Semester 2 Exam - Part A

Select your class

• 8 Blue
• 8 Navy
• 8 Sky
• 8 White

Write your First name

Write your Last name

1. The diagram below shows Earth's layers. The layer labelled X is the:

• crust

• outer core

• mantle

• inner core

2. Which layer of the Earth is liquid?

• Inner core
• outer core
• lower mantle
• crust

3. All rocks are composed of minerals. Which property is NOT used to identify a mineral?

• lustre
• electrical conductivity
• streak
• hardness

4. Rocks that contain naturally occurring minerals that are valuable are called:

• sedimentary rocks
• metals
• gems
• ores

5. Below is a key that a Geologist might use when trying to identify a mineral they have found. Based on this key, Cassiterite has the following properties:

• black colour, magnetic
• black colour, not magnetic, red streak
• black colour, not magnetic, white streak, goes silver when reacted with zinc and hydrochloric acid
• black colour, not magnetic, white streak, no reaction with zinc and hydrochloric acid

6. The Moh's Hardness Scale uses a range of commonly available materials to compare hardness. Which statement is best supported by the data shown?

• Steel is composed of quartz
• a copper coin is composed of fluorite
• Topaz is harder than a fingernail
• Apatite is softer than a fingernail

7. The diagram below represents a cross section of FOUR sedimentary layers containing fossil remains. Which type of fossil is found in the most recently formed rock layer?

• Early horses
• Dinosaurs
• Armoured fish
• Trilobites