Biology, Week 4 – Why Does Your Heart Beat When You Get Startled

3. Someone sneaks up behind you and shouts, “Boo!” For a few seconds your heart beats faster. You did not run or do any physical activity that would increase your heart rate. What caused your heart to beat so fast?     Have you ever been home alone when you heard a creak somewhere in the house? … More Biology, Week 4 – Why Does Your Heart Beat When You Get Startled

Biology, Week 2 – Properties of Water

Describe some of the properties of water that make it so critical.     Water is essential to life on earth. Without it, there would be no plants, animals, humans, and any other living organisms. Water is made up of one oxygen molecule covalently bonded to two hydrogen molecules. Oxygen, hydrogen, nitrogen, and carbon are considered the … More Biology, Week 2 – Properties of Water