An amplifier is a device that increases the amplitude of a signal. For most people, this means it takes sound and makes it louder. Modern amplifiers also take incoming electrical signals and turn them into sound. When you plug headphones into your iPod, the amplifier in the headphones converts the signal from the iPod into sounds.
You use the word an instead of a in front of a word that starts with a vowel.
For example, "I saw an elephant".
An anchor is a device that is used to stop a ship or boat from drifting away. Anchors are made from heavy metal, and are hooked so they catch onto the seabed. They are attached to the ship by a long chain or rope, and are let down when the ship needs to be still, and lifted up when the ship needs to move again.
Scientific name: family: engraulidae
Something is ancient if it is from the distant past, or is very old. Most things that are described as ancient are from civilizations that have since fallen.
And is a word that is used for connecting two other words together. For example:
"Anne and Mary went for a walk."
"3 and 5 is 8."
"I went to the shop to buy milk, bread and eggs."
You can also write and as an ampersand.
