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Wind and water break down rock into smaller pieces in a process called
weathering
Tiny pieces of rock make up ____________
sand
A hard non-living object from the ground is _________
rock
Which is the smallest? A boulder, pebble, or piece of sand?
piece of sand
What makes up soil? Only once living things, only rocks and water, or rocks and once-living things?
Rocks and once-living htings.
How are these rocks sorted? By color, by shape, or by size.
by color
Desmond makes the claim that soils with different textures are made of different materials. How does he find evidence for this claim? Does he put the soil in boxes, does he observe the soils, or does he plant a shrub in one of the soils?
He observes the soils.
Jill observes the size of the grains in soil. Which tool does she use? A balance, a hand lens, or a thermometer?
a hand lens
Kyra wants to grow flowers in a pot. Which type of soil will best help the flowers grow best? Clay, humus, or sand?
humus
Weathering acts on pebbles. What forms from the weathered pebbles? Boulders, sand, or humus?
sand
Ben has wet soil that feels sticky and holds water well. What will this soil feel like when it dries? Will it feel hard and soft? Soft and flaky? Or sandy and gritty?
hard and smooth
Annie wants to know which soil is best for growing plants. How can she find out? She can grow plants in the same soil, but different light and water. She can grow plants in the same light and water, but in different soils.
Annie can grow plants in the same light and water but in different soils.
What is the main use of soil? To build homes, to break down rocks, or to grow plants?
to grow plants
