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100
__________ are natural features on Earth's surface. They can be different sizes and shapes. Examples are mountains, plains, valleys, canyons, and beaches.
landforms
100
During this process, weathered rock is carried, dropped elsewhere, and layered down. This can happen slowly or quickly.
deposition
100
________ is material in soil made up of decayed plants and animals.
humus
100
What is a break or crack in rocks where Earth's crust can suddenly move? Earthquakes happen along here.
a fault
100
1. A method of clearing top layers of soil to reach natural resources such as coal is called ______ ________. 2. The process of restoring land after it has been used is called __________. 3. Our nation has made ______ _________ to help save, or preserve nature. 4. This process is called ______.
1. strip mining 2. reclamation 3. national parks 4.preservation
200
___________ is a process that causes landforms to change constantly. It occurs when Earth's crust is slowly broken into smaller pieces.
weathering
200
Which two landforms are made by erosion?
canyons and valleys
200
What are the 3 basic types of soil? What is a mixture of these 3 types called?
sand, silt, and clay. the mixture is called loam.
200
What is the place where Earth's plates start to slip in an earthquake? What is the point on Earth's surface directly above it?
the focus, the epicenter
200
Natural resources are supplies found in nature. All living things depend on them. Name 7 examples.
air, water, soil, minerals, sunlight, plants, and animals
300
________ ___________ happens when chemicals on Earth mix with carbon dioxide. Rocks slowly change into different materials and break down.
chemical weathering
300
Which 3 landforms are made by deposition?
beaches, deltas, and sand dunes
300
Good soil supports plant growth. What are the 3 properties of soil?
1. color 2. texture 3.the ability to hold water
300
Scientists use _______ to locate and measure earthquakes.
seismographs
300
1. Natural resources that can be replaced are called ____. Give an example. 2. Natural resources that exist in limited amounts or are used faster than can be replaced in nature are called ___. Give an example.
1. renewable resources, plants, trees, animals, water, and oxygen 2. nonrenewable resources, minerals, fossil fuels, ores
400
What 5 things can cause physical weathering? The rocks break into smaller pieces of the same rock.
water, ice, temperature, animals, and plants
400
________ is the layer of loose material that covers most of Earth's land. It's full of plants, animals, organisms, minerals, and air.
soil
400
Plants grown for food are called _________. They grow best in soil with ________ and many ________.
crops, loam, nutrients
400
1. A __________ is an opening in Earth's crust where gases, ash, and molten rock called lava comes out. 2. A ______ is a huge wave of water. 3. _________ sometimes occur when heavy rains, volcanoes, or earthquakes loosen materials. The land is then pulled downward by gravity.
1. volcano 2. tsunami 3. landslides
400
These are a type of nonrenewable resource made from organisms that lived long ago. Examples include petroleum (oil), coal, and natural gas, which is burned to provide energy.
fossil fuels
500
Gravity, wind, water, and ice all slowly move and carry away pieces of weathered bits of rock in this process.
erosion
500
What is the key ingredient in soil? It's made from different kinds of pieces of weathered rock.
particles
500
Earth's outer crust and mantle are divided into very large pieces called _________, which move all the time causing ________ and _________.
plates, earthquakes, volcanoes
500
1. ______ is the waste from products made or used by people. It affects the air, water, land, and us. 2. A ______ is an area into which most trash is dumped. 3. Modern ones can be beneficial to the environment because they are designed to ________ and __________.
1. pollution 2. landfill 3. protect underground water and control pollution
500
You can reduce pollution by recycling. This is an example of ______, which means you are using natural resources wisely and efficiently.
conservation