WorksheetsEarth's Processes 2019
Total questions: 25
Worksheet time: 13mins
Which layer is thought to to be composed of mostly iron and nickel?
1
2
3
4
The inner core of Earth is solid because of the...
rate of rotation
extreme temperatures
amount of pressure
magnetic field
A student uses clay to construct a model of Earth. Which layer of the model should be the thinnest layer?
the layer representing the mantle
the layer representing the outer core
the layer representing the inner core
the layer representing the crust
The diagram shows the composition of the surface of the Earth. Which best summarizes the composition of the surface of the Earth?
three-fourths of Earth's surface is land
one-fourth of Earth's surface is water
Earth's surface contains more land than water
Earth's surface contains more water than land
When an earthquake occurs, the speed of the seismic waves changes as they
move through different materials
are pulled by the force of gravity
lose energy to surrounding rocks
reflect off boundaries
The picture shows the layers of the Earth. When compared to the other layers of Earth, which layer has the lowest density?
crust
inner core
mantle
outer core
Extreme conditions make Antarctica difficult for vegetative growth. Most of the plants that grow in Antarctica are simple plants, such as mosses. However, scientists found many fossils of broad-leaved plants that are now extinct. Which statement explains why extinct broad-leaved plants have been found in Antarctica?
polar regions of Earth provided enough water to support plant life
tsunamis carried rocks containing plant fossils to Antarctica over time
Antarctica was once joined with other continents farther from the South Pole
Earth's South Pole was located where the equator is today millions of years ago
Between 40 and 50 million years ago, the landmass on the Indian Plate collided with the landmass on the Eurasian Plate. What formed when these landmasses collided?
The Grand Canyon
The Great Plains
The Himalayan Mountains
The Mariana Trench
Seafloor spreading occurs along certain boundaries in the ocean. Which are MOST likely to form at the boundary where the seafloor is spreading?
strike-slip faults
subduction zones
mid-ocean ridges
continental shelves
What causes the tectonic plates of Earth to continually move?
convection currents in the mantle
volcanic and seismic activity in the crust
strong winds and storms
rotation of the solid core
Which event MOST likely caused the formation of folded mountain ranges on Earth?
tectonic plates pulling apart
tectonic plates pushing together
tectonic plates sliding past each other
tectonic plates breaking into small pieces
Which is an example of a mixture?
oxygen
ice
soil
silver
A sample of soil in an area of land has the following characteristics:
Surface Area: Flat
Soil Color: Dark brown
Soil Content: Humus, sand, and clay
Texture: Gritty
Which characteristic of this area indicates that the soil was formed as a result of the interaction between organisms and their environment?
the area is flat
the soil color is dark brown
the soil contains humus
the soil feels gritty
The BEST soil mixture for plant growth and drainage is
silt, pebbles, and clay
sand, rocks, and clay
humus, clay, and sand
clay, silt, and rocks
What is the source of the organic matter needed for MOST fertile soil?
moving water
eroded sand
decaying plants
weathered bedrock
If soil is permeable
water cannot flow through it
water easily flows through it
it contains many minerals
it contains few minerals
Which farming method involves planting different vegetables in different places each growing season to maintain soil quality?
conservation plowing
contour plowing
terrace farming
crop rotation
Soil will pack down over time which decreases the ability of soil to hold water. Which animals would BEST help the soil hold water?
earthworms making tunnels under the surface
cattle making depressions with their hooves
horses making trenches when they gallop
sheet pulling up plants by their roots
What MOST likely happens to soil when crops are NOT rotated form year to year?
the soil nutrients are depleted
the soil fertility increases
the soil becomes more porous
the soil erodes less rapidly
This illustration shows how most of the recycling of rock from Earth's crust occurs. What is this process called?
subduction
congergence
divergence
faulting
Where does the energy from an earthquake originate?
from a sudden increase in solar radiation striking Earth
from the Moon's gravitational pull during a close orbit
from rocks under stress shifting deep below Earth's surface
from the weight of sediments pushing down on bedrock
The first person to introduce the idea of the continents moving around the surface of Earth was
Niels Bohr
Albert Einstein
Charles Darwin
Alfred Wegener
To which of the following phenomena do humans contribute the least?
plate tectonics
soil erosion
air pollution
deforestation
Scientists discovered the fossilized remains of a land reptile that lived 200 million years ago on the coasts of South America and Africa. Which claim is BEST supported by this discovery?
New types of rock have formed in South America and Africa.
All animals in South America and Africa are related to reptiles.
South America and Africa are moving slowly away from each other.
Sedimentation in South America and Africa has caused the fossilization of many reptiles.
Alfred Wegener proposed the theory of continental drift around 1912. Which of these components of his theory is now known to be FALSE?
Similar plants and animals live on continents separated by oceans.
All existing continents were once joined into a supercontinent.
The boundaries of many neighboring continents fit together.
The Moon's gravity and Earth's spin can move the continents.
