What are three examples of trade?

What are the symptoms that someone will experience if their body does not get enought oxygen? What are some good non swareing comebacks for siblings? What are ideas and materials for a science project? Why moment of inertia is also called rotational inertia? In what way is the movement of water similar to the way people in large groups move when they evacuate a building or an area? What are earth forces? What is an every day object some what like a vacuole? What was the name of the book Darwin published? How many Fahrenheit is 36 degrees Celsius? What is the stimulus for smell? What is the movement materials out of the cell using a vacuole? Granite is made up of the minerals feldspar and mica? Is NaCi an element or compound? What does effect mean in science? Distillation is a process that can separate two liquids using what? When was the first sock made? Mass and weight are different words for the same property of matter? What is a sentence for the word weight in science? General properties of enzyme? What is the temperature for stainless steel to freeze?