PLANET
What are the 3 layers of the earth?
The crust, mantle, and core.
What are faults?
The cracks between tectonic plates.
What is a natural resources?
Things people use from the earth.
How is the earth kept warm?
By energy from the sun.
How much of the earth's surface do we use for farming?
About 40%
What is a continent?
A large piece of land on the earth.
Where is the mid-oceanic ridge?
In the middle of the ocean.
What is one of the most important natural resources?
Fresh water.
What do animals release when they breathe?
Carbon dioxide
What is vertical farming?
Farms that are tall, not wide.
What was the earth 4.5 billion years ago?
A hot ball of magma.
What can cause an earthquake?
Two plates slipping past each other.
Which kind of resource can we make more of?
Renewable resources
What is the slow rise of the earth's temperature called?
Global warming.
What kind of water do many community gardens use?
Rain water
Where are oceanic plates?
They are under the ocean.
What is a hot spot?
A hole in the crust where volcanoes form.
What is a reservoir?
A lake made by building a dam across a river.
What is deforestation?
When people cut down forests for wood or to make farms.
What is hydroponics good for saving resources?
It uses less water, soil, and land.
What does the hot, soft rock in the mantle do?
It moves slowly under the plates. As it moves, it pulls the plates with it.
Where do most of the big earthquakes on the earth happen?
Along the Ring of Fire.
What do irrigation systems do?
Carry water to farms to help plants grow.
What do people use fossil fuels for?
To make electricity, heat, and run machines.
How can science scientists change crops to make them grow faster?
They can change the crops' DNA.