Physics, Science, Middle school Keywords: Density, uphtrust (buoyancy), liquids, gases, pressure, floating, lifting, sinking, overall density, average density Presents the concept of upthrust, and how the relation...

The greenhouse effect is a natural process that warms the Earth's surface. When the Sun’s energy reaches the Earth, some of it is reflected back to space, and the rest is absorbed by the land, oceans, and atmosphere....

This explains the total types in chemical reations with suitable examples. From that you can learn basic chemistry very well and you can distinguish which type of reaction is given. you can use this as assignment