7th Grade Science Unit 6 | Baamboozle - Baamboozle

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Why don't eclipses occur every month?

The Moon's orbit is tilted so perfect alignment doesn't happen monthly

What three states of matter can sound travel through?

Solids, liquids, and gases

What do boats use echoes for?

To measure water depth

What are active volcanoes?

Volcanoes that may erupt at any time

When is a total solar eclipse observed?

When standing in the middle of the Moon's shadow where all sunlight is blocked

When does a partial solar eclipse occur?

When only part of the Sun's rays are blocked

What causes a lunar eclipse?

Earth comes between the Sun and the Moon

What is the outer core made of?

Molten metal, mainly iron and nickel

What is an opaque object?

An object that does not allow light to pass through it

How old are new fold mountains like the Himalayas?

Between 10 and 25 million years old

What is the term for the substance that sound moves through?

Medium

What causes a solar eclipse?

The Moon passes between the Sun and Earth

What is the most common non-metal in Earth's crust?

Oxygen

What two types of tectonic plates are there?

Oceanic plates and continental plates

How do sound waves travel?

Through vibration of particles

What method do bats use to locate insects?

Echolocation

What is the mantle made of?

Molten rock that can flow slowly

Can sound travel through a vacuum?

No

What can happen when tectonic plates slide past each other?

Earthquakes due to friction and sudden movements

What is an echo?

A sound wave that bounces off a surface and returns to the original source

What is the Pacific Ring of Fire known for?

Frequent geological changes including volcanic eruptions and earthquakes

What determines the magnitude of an earthquake?

The size of faults at plate boundaries and how far rocks move

What was the name of the supercontinent that contained all land masses?

Pangaea

Name three pieces of evidence Wegener used for continental drift.

The shapes of continents fit together, matching rock types, and similar fossils on different continents

What medical technology uses sound echoes to see inside the body?

Ultrasound scans

Why is the total distance sound travels in water depth measurement double the actual depth?

The sound travels down and back up

Why can't sound travel in space?

Space is a vacuum with no particles for sound to travel through

How fast do tectonic plates move?

About 4 cm per year

What is the difference between magma and lava?

Magma is liquid rock underground while lava is liquid rock on the surface

Who proposed the theory of continental drift?

Alfred Wegener

What is the speed of sound waves in air?

About 343 meters per second

What is subduction?

When one tectonic plate slides beneath another

Why can violent volcanic eruptions occur?

From thick magma with dissolved gases causing pressure to build up

How old are old fold mountains like the Urals?

Over 200 million years old

What is the inner core made of?

Solid iron and nickel

What are extinct volcanoes?

Volcanoes that will not erupt again

What are the four main layers of the Earth?

Crust, Mantle, Outer Core, Inner Core

What happens when tectonic plates drift apart?

They crack and break, and lava erupts to form new crust

What are the places where tectonic plates meet called?

Plate boundaries

What is the most common metal in Earth's crust?

Iron

Why do recording studios need to prevent echoes?

Echoes can distort the sound

What safety precaution should be taken during a solar eclipse?

Never look directly at the Sun

What forms when tectonic plates collide and rocks crumple upward?

Fold mountains

What do vocal cords do when you speak?

They vibrate

What are inactive or dormant volcanoes?

Volcanoes that have not erupted for a long time

What are the large sections of Earth's crust called?

Tectonic plates

If you hit a drum with more force, what happens to the sound?

It becomes louder