Assessment 11
1. Vibration means to move backwards and forwards very quickly.
2. Sound can vary in both loudness and pitch
3. Frequency is the measurement for pitch and amplitude is the measurement
for loudness.
4. To make the sound louder, you must increase the vibration.
5. In order to hear a sound, the particles must vibrate.
6. Sound travels the best in solid because molecules in a solid medium are
much closer together
7. A sound wave is created when the particles in the air vibrate backwards and
forward.
8. Sound cannot be heard in the space because space is a vacuum and there is
no medium containing particles through which the sound can travel.
9. Reflection of sound happens when the sound wave travel towards a wall and
hits the wall.
10. 3 criteria of a good sound reflector are: large, smooth and flat
11. Reflection of sound is known as echo.
12. 3 main parts of the Earth are crust, mantle and core.
13. Molten metals are found in the outer core and solid metals are found in the
inner core of the Earth. Why is there a difference in the appearance of the
metals?
The outer core, the heat melts the core despite the amount of pressure
present. In the inner core, the effect of the pressure helps the effect of heat
and holds the core’s particles close together to form a tough solid.
14.
Name the 2 main types of metals found in the core: Iron and nickel
15.
2 types of plates are: oceanic and continental
16.
Tectonic plates meet in places called plate boundary
17.
What does the Pacific Ring of Fire mean?
Path along the pacific ocean characterised by active volcanoes and frequent
earthquakes.
18.
When one plate sliding underneath another one is called subduction
19.
When the plates slide due to friction earthquake happens.
20.
Crumpled rocks form the fold mountains.
21.
Fold mountain can happen in the ocean and on land.
22.
3 types of volcanoes are: active, inactive or dormant
23.
Shadows are formed when light is not allowed to pass through.
24.
Solar eclipse formed when the Moon comes between the Sun and the Earth.
25.
Lunar eclipse happens when the Earth comes between the Sun and the
Moon.