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Pebbles, Sand, and Silt Answer Key

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Rock Sizes
#1 Which rock size is bigger: gravel or pebble? pebble
#2 Which rock size could be as big as a car? boulder
#3 What was the smallest rock size? clay
#4 Which rock size is bigger: silt or sand? sand
#5
Experiments
#1 What are two ways we can sort rocks? color, size, shape, feel
#2 True or False: rocks make rock dust when they are rubbed together? true
#3 True or False: rocks may change color when they are put into water? true
#4 What are the two techniques we used to sort rock sizes? screens and water
#5
Definitions
#1 What do you call a person who studies rocks? geologist
#2 Which one of these is NOT a type of rock: Basalt, Abrasive, Tuff, Scoria? Abrasive
#3
#4
#5
Soil
#1 How can we observe soil: using screens or water? water
#2 What three things make up soil? sand, humus, silt
#3
#4
#5
#1
#2
#3
#4
#5
Final Question