Worksheets4th Grade Science: Chapter 6
Total questions: 23
Worksheet time: 12mins
Name
Class
Date
1.
What are strata?
a)
Layers of water
b)
Layers of rock
c)
Layers of air
2.
What are fossils?
a)
Living organisms
b)
Mineralized remains or evidence of past life
c)
Pieces of sediment
3.
A mark, footprint, trail, or burrow of a plant or animal.
a)
mold
b)
trace
c)
true form
4.
Plant or animal dies and is covered by sediment.
a)
mold
b)
trace
c)
true form
5.
Minerals fill inside of a mold fossil.
a)
cast
b)
trace
c)
true form
6.
Part of a plant or animal.
a)
cast
b)
trace
c)
true form
7.
What information can fossils provide about past environments?
a)
Clues about the size of organisms
b)
Clues of the color of the sky
c)
Clues into whether organisms lived on land or in water
8.
How do layers of sedimentary rocks typically form?
a)
New layers form on top of older ones
b)
By the movement of tectonic plates
c)
By volcanic eruptions
9.
Do rocks form by hardening into different layers and creating patterns that are parallel to the Earth's surface, known as horizontal patterns?
a)
Yes
b)
No
10.
__________ from deep in the Earth gets pushed into the layers. When it cools, ______________ rock is formed.
a)
magma, sedimentary
b)
magma; igneous
c)
rumbles; solid
11.
What process changes sedimentary rock into metamorphic rock?
a)
Weathering
b)
Volcanic activity
c)
Heat and pressure
12.
What tool has been developed to organize Earth's history and divide it into unequal sections?
a)
The fossilization index
b)
The geological time scale
c)
The sedimentary layer chart
13.
What do the fossilized organisms within a layer of rock indicate?
a)
The number of earthquakes in the area
b)
Clues about the temperature of the atmosphere
c)
Clues into what the land was like
14.
What happens to parts of the ocean when sea levels decrease?
a)
They become dry land
b)
They become deeper
c)
They become colorless
15.
When sea levels go back up, the land becomes ___________ again. This is how fossils of land animals can be found between layers or marine fossils.
a)
flooded
b)
dry
16.
How do scientists correlate rock layers of the same age from different locations?
a)
By analyzing fossil diversity
b)
By studying key beds
c)
By measuring seismic activity
17.
What method do scientists use to correlate rocks by studying easily identifiable layers?
a)
Radiometric dating
b)
Fossil analysis
c)
Key beds
18.
Key bed layers form in different ways.
a)
True
b)
False
19.
What event formed the famous key bed known as the K-T boundary?
a)
Volcanic eruption
b)
Earthquake
c)
Meteorite impact
20.
What defines a mass extinction event?
a)
Limited species loss
b)
Moderate climate change
c)
Many species going extinct simultaneously
21.
Approximately how long ago did the meteorite impact responsible for the formation of the K-T boundary occur?
a)
66,000 years ago
b)
6.6 million years ago
c)
66 million years ago
22.
What substance did scientists discover in the key bed layers associated with the mass extinction event?
a)
Gold
b)
Iridium
c)
Diamond
23.
Scientists believe that an asteroid crashed on Earth causing a cloud to form and change the climate. Plants and animals became extinct.
a)
True
b)
False
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