The distance across a circular object is the _________.
diameter
100
The scratch test determines a rock's ______________.
hardness
100
What is a rock?
A mixture of different minerals.
100
Can some rocks be larger than buildings?
Yes, some rocks can be bigger than buildings.
200
The distance around a circular object is the __________.
circumference
200
Which of these is a good way to tell the hardness of a material?
a. write on it with a pen
b. scrape it with a nail
c. drop it on the ground
b. scrape it with a nail
200
What is the name given to the scientist who studies the earth?
geologist
200
What are sedimentary rocks made from?
Sedimentary rocks are made from sediments (particles from the earth) such as shells and calcite.
300
How thick an object is from top to bottom is the _______.
depth
300
What does the vinegar test determine?
It determines whether or not a rock contains the mineral calcite.
300
What is the difference between a rock and a mineral?
A mineral is made of only one substance, and a rock is a mixture of different minerals.
300
How many kilograms or pounds did astonauts collect from the moon?
More than 350 kilograms or 800 pounds.
400
When you weigh an object, you are trying to find that object's _________________.
mass
400
How does evaporation help you study a rock?
Evaporation helps separate the parts of a rock. The patterns of the crystals determine the minerals.
400
What is one of the most common minerals on earth? (Hint: It fizzes when dropped in vinegar.)
calcite
400
What type of information does the U.S. Geological Survey provide?
The U.S. Geological Survey provides maps and information regarding where people can find certain types of rocks and minerals.
500
Something you can observe like size, color, shape, or texture is a ______________.
property
500
Which of these is not a good way to learn about rocks?
a. dropping a rock from a high place to learn how hard it is
b. looking at a rock with a hand lens to learn what is in the rock
c. scratching a rock with a knife to learn how hard the rock is
a. dropping a rock from a high place to learn how hard it is
500
What would be a good use for a very hard material like quartz?
Sample answers could include jewelry, countertops, and tables.