Primary 6 Science Midterm Review for the 2nd sem

What are rocks primarily composed of?

• Metallic substances
• Volcanic materials
• Both metallic and non-metallic substances
• Organic matter

What are the three main types of rocks?

• Sedimentary, Volcanic, and Granite
• Igneous, Metamorphic, and Earthy
• Igneous, Sedimentary, and Metamorphic
• Sandstone, Basalt, and Limestone

How are igneous rocks formed?

• By weathering and erosion
• From high pressure and heat
• Through cooling and solidification of magma or lava
• By deposition of sediments over time

Which igneous rock is commonly used in jewelry due to its glassy surface?

• Granite
• Basalt
• Obsidian
• Pumice

What is a characteristic texture of granite?

• Porous
• Glassy
• Large mineral grains
• Fine mineral grains

How are sedimentary rocks typically formed?

• Through volcanic activity
• By high pressure and heat
• By the deposition of sediments layer upon layer
• By the cooling of lava

What are fossils usually found in?

• Igneous rocks
• Metamorphic rocks
• Sedimentary rocks
• Volcanic rocks

Which rock type is used to make bricks and pottery?

• Basalt
• Sandstone
• Shale
• Limestone

What is the process of breaking down rocks into smaller pieces called?

• Melting
• Erosion
• Sedimentation
• Weathering

What process carries away broken rocks?

• Melting
• Weathering
• Erosion
• Sedimentation