Rocks
What is a rock?
A naturally occurring solid made of one or more minerals.
Are minerals natural or man-made?
natural
What happens to rock when it melts?
It becomes magma or lava.
Name one place where you might find rocks.
Many answers: beach, garden, road, forest, mountains, etc.
True or False: All rocks are made of minerals
True
What are 3 main types of rocks?
Igneous, sedimentary, and metamorphic.
Name one property scientists can use to identify a mineral.
Colour, hardness, lustre, streak, cleavage, etc.
What is magma?
Melted rock beneath Earth's surface.
Why are rocks often used to build roads?
They are strong and durable.
True or False: A mineral must be made by humans.
False.
Which type of rock forms when melted rock cools and hardens?
Igneous
What does a mineral's hardness tell us?
How easily it can be scratched.
What is lava?
Melted rock that reaches Earth's surface.
Name one mineral that is commonly used in glassmaking.
Quartz.
Which rock type is most likely to contain fossils?
Sedimentary.
Which type of rock forms from layers of sediment that become compacted and cemented?
Sedimentary
What is lustre?
How the surface of a mineral reflects light.
What two forces can change existing rocks into metamorphic rocks?
Heat and pressure.
What rock is commonly used to make buildings, countertops, or monuments?
Granite or marble.
If you find a rock with visible layers, which type might it be?
Sedimentary.
Which type of rock forms when existing rock is changed by heat and pressure?
Metamorphic
What is a mineral's streak?
The colour of the powder it leaves when rubbed across a streak plate.
What process can break rocks into smaller pieces through wind, water, ice, or plants?
Weathering
Why might two rocks from different places look different?
They may contain different minerals or have formed in different ways.
A rock deep underground is exposed to intense heat and pressure but does not melt. What type of rock could it become?
Metamorphic rock.