Year 9 Science Physics Topic 4 Waves and the Earth
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Frequency | The number of waves passing a point each second.
🗑
|
||||
| Hertz (Hz) | The unit for frequency 1 hertz is 1 wave per second.
🗑
|
||||
| Longitudinal | E.g. sound waves where the direction of energy transfer is parallel with the direction of movement of the energy.
🗑
|
||||
| Medium | Something through which waves travel.
🗑
|
||||
| Pitch | Whether a sound is low or high.
🗑
|
||||
| Infrasound | Sound waves with a frequency below 20Hz which is too low for the human ear to detect.
🗑
|
||||
| Ultrasound | Sound waves with a frequency above 20000Hz which is too high for the human ear to detect.
🗑
|
||||
| Reflect | When a wave bounces off a boundary between two materials.
🗑
|
||||
| Sonar | A way of finding the distance to an underwater object (such as the sea floor) by timing how long it takes for a pulse of ultrasound to be reflected.
🗑
|
||||
| Ultrasounds scan | A way of making an image of part of the body (usually a foetus) using ultrasound waves reflected from parts of the inside of the body.
🗑
|
||||
| Earthquake | A sudden movement within the Earth releasing a large amount of stored energy.
🗑
|
||||
| Seismic waves | Waves produced by an explosion or earthquake and which travels through the Earth. They include P-waves and S-waves.
🗑
|
||||
| Seismometer | An instrument that detects seismic waves.
🗑
|
||||
| Focus | The place where an earthquake begins usually under the surface.
🗑
|
||||
| Epicenter | The point on the surface of the Earth directly above the focus of an earthquake.
🗑
|
||||
| P waves | Longitudinal seismic waves that travel through the Earth.
🗑
|
||||
| S waves | Transverse seismic waves that travel through the Earth.
🗑
|
||||
| Crust | The outer surface of the Earth.
🗑
|
||||
| Mantle | The part of the Earth between the crust and the core.
🗑
|
||||
| Core | The middle of the Earth.
🗑
|
||||
| Refraction | The chang of speed and direction of a wave when it enters a new material.
🗑
|
||||
| Plates | Sections of the outermost layer of the Earth that can move relative to each other.
🗑
|
||||
| Tectonic plates | Pieces of the surface of the Earth which can move around very slowly.
🗑
|
||||
| Convection currents | A current caused by parts of a fluid being at a different temperature and so a different density to the rest of the fluid.
🗑
|
||||
| Tsunami | A huge wave caused by an earthquake or landslide on the sea bed.
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
bookcase
Popular Physics sets