How telescopes work

Video which explains how telescopes work.

How the heart works

The heart pumps blood into the arteries when its muscular walls contract. Each cycle of contractions is called a heartbeat. Young people have between 70 and 90 heartbeats a minute. When the heart…

How paper is recycled

Paper is taken from the bin and deposited in a large recycling container along with paper from other recycling bins. The paper is taken to a recycling plant where it is separated into types and gra...

how meiosis work

Match. How bacteria feed

Match each group of bacteria with the way it obtains its food: photosynthetic bacterium parasites chemosynthetic bacterium saprophytes symbionts

How Archaeology Works - HowStuffWorks

Archaeology is the study of ancient civilizations and human remains, such as buildings, art or trash. Learn about archaeology and archaeologists.

How superstitious are you?

You will hear some questions. As you listen, choose A or B or C or D below. A, B, C, D A, B, C, D A, B, C, D A, B, C, D Look at your answers. The voice on the recording will tell you how to add up your…

How green are you?

Find out how green you are with this quiz

How much is this?

How to Control Aphids

Different ways to control the spread of aphids in the garden.