6th Grade Science Final Review

Which are fossil fuels?

Molten liquid rock- in the mantle

At convergent boundaries, denser rock gets pushed under and back into the mantle where it melts

Plates move toward each other- At convergent boundaries to make mountains, trenches, subduction

What is the imaginary line on which a planet spins?

When two plates slide past each other possibly causing earthquakes?

Three sources of solid waste sources are........

The time of the year when the Northern hemisphere has its shortest day.

The time of the year when the Northern hemisphere has its longest day.

What are natural resources that cannot be replaced by nature in a reasonable amount of time?

These are gases that trap heat close to Earth's surface that keeps it at the right temp.

These are huge balls of burning gas.

What is anything removed from Earth that can be used by man?

Any useless, unwanted, discarded material.

They are caused by the tilt of the axis and the revolution of Earth around the sun.

What is a refined form of oil used to make the fuel gasoline, plastics, medicines, etc.?

Cool air that is trapped near the Earth's surface, with pollutants, under a layer of warm air.

This is renewable energy produced by the wind.

A device placed on the tops of chimneys/smokestacks to reduce emissions from burning foss. fuel

the semi-solid layer that separates the mantle from the outer core.

Where garbage is compacted, then covered with a layer of topsoil and planted with grass.

This crust is made of basalt, and is thinner but more dense.

a Bend in a rock, it creates mountains at convergent boundaries

Semi-solid, thin layer that separates the CRUST from UPPER MANTLE

When the lit part of the moon is decreasing.

a natural satellite orbiting a planet

A crack or break in the Earth's crust where plates move and Earthquakes can happen.

Idea created by Alfred Wegener- all pieces of Earth were once connected, but have drifted apart

A v- shaped valley- occurs at subduction/convergent boundaries

All of the water on Earth.

How many phases of the moon are there?

The study of how the Earth's crust continually moves, collides, separates and changes shape.

Renewable energy produced by the sun is_____.

What is anything that changes the environment for the worse due to human activities?

The trapping of heat near Earth's surface by certain gases in the atmosphere.

The force of attraction between two objects.

This is the orbit of one planetary body around another.

The theory that greenhouse gases in the atmosphere will raise Earth's average temperature.

The imaginary line that divides the Earth into the Northern and Southern hemispheres.

What is the layer that separates the mantle from the outer core?

What is any discarded material that causes death or serious harm to human health?

Thick brownish haze formed when certain gases in the air react with sunlight.

This means equal day and night.

An underwater mountain chain, that happens at divergent boundaries due to magma piling up

This is the most threatening form of land pollution.

What is the Lithosphere made up of?

The spinning of a planetary body on an imaginary axis.

An instrument that measures Earth's movements. It tells us the strength of Earthquakes

When the lit side of the moon appears to be increasing.

The rise and fall of the molecules of a fluid due to changes in density caused by heat energy

The layer of Earth made of iron and nickel, giving Earth its magnetic property

A from of oxygen that contains three oxygen atoms. It's both helpful and harmful.

Plates move away from each other- at convergent boundaries. Creates mid-ocean ridges, valleys

What is the semi-solid layer located beneath the crust?

What is the process by which water, wind, or ice moves particles of rock or soil?

This crust is made of granite, and is thicker but less dense

EARTH as one huge landmass. ALL EARTH

A device placed on the pipes of cars to reduce emissions from burning fossil fuels.

A general term used to describe precipitation that has a pH lower than 5.6.

These are gases released during the burning of fossil fuels that form acid rain.