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Worksheets5.9D What Happened Before?
Total questions: 20
Worksheet time: 11mins
How do scientists learn about dinosaurs?
by studying fossils
by reading about them
by watching movies
by looking at pictures
The diagram above shows layers of sedimentary rock in the Earth’s crust. In which layer of rock should a scientist expect to find the oldest fossils?
Layer M
Layer N
Layer O
Layer P
Fossil trees were discovered in a sedimentary rock layer. In the rock layer below are fossils of clams, similar to clams that are currently found on the shores of the Gulf of Mexico. Based on this evidence, we could conclude that the area where the fossils were discovered had what sequence of climates in the past?
Beach, followed by a forest
Rocky and dry, then very moist
Forest, and later a mountain
Very cold area, then much warmer
An ancient fossil of a fish was found in a dry area. What does this suggest about how this area used to look?
The land was a dense forest
The land was a dry dessert
There was once water in the area
The fossil was moved because there could not have been water there in the past
The picture shows a rock found in Texas. Which of the following best illustrates that the rock was formed from ocean sediments?
The number of fossils in the rock
The size of the fossils in the rock
The place where the rock was found
The type of fossils in the rock
This rock contains fossils of water plants and shells. What does this tell us about the rock?
The rock contains many living things
The rock needs to be cleaned with water
The rock is heavier than most rocks
The rock was once at the bottom of the sea
This table gives information on different fossils. According to the information on the table, finding which fossil in a region would lead to the conclusion that the area was, long ago, covered with trees?
Finding fossils in an area can help us learn what about that location?
Which places in the region receive the most sunlight
The effect of the climate on the formation of soil
How modern plants and animals interact there
The kinds of organisms that lived there long ago
This table gives information for different kinds of fossils. Finding which kind of fossil would lead to the conclusion that the area where it was found was, long ago, under hundreds of meters of salt water?
The diagram represents the layers found inside a rocky cliff. The rock layers contain fossils. Which of the following layers of rock is most likely the youngest?
The layer containing trilobites.
The layer containing fishes.
The layer containing amphibians.
The layer containing mammals.
Based on the image, what type of environment did this organism live in?
This organism lived in an ocean.
This organism lived in a river.
This organism lived on land.
This organism lived in a lake.
This diagram represents the layers of the earth and fossils found in each layer. Based on the drawing, which imprint is the oldest?
Freshwater clam shells
Fish bones
Fern imprints
Leaf imprints
Which layer of sedimentary rock is the youngest (newest)?
1
2
3
4
What type of environment existing when this imprint of a fern leaf was created?
Desert
Forest
Ocean
Tundra
Which layer of sedimentary rock is the oldest?
1
2
3
4
Most fossils are found in –
frozen rock
igneous rock
sedimentary rock
metamorphic rock
What is a fossil?
The preserved remains of a dead plant or animal found in a rock
Fuels that formed from the decayed remains of plants and animals
A solid natural material that has a crystal form and its own set of properties
A resource that can replace itself in a relatively short period of time
