A dog owner wants to test how exercise affects how his dog sleeps. His hypothesis was, “If my dog has more hours of exercise, then the number of hours he sleeps will increase because he uses more energy exercising”. He was careful to give his dog the same amount of food on the days he did the experiment. His results are in the table below. What is the Independent variable?
What is the dependent variable?
What are the constants?
What is the Hypothesis? (If...then and because)

ID-AMOUNT OF EXERCISE

DV-# OF HOURS SLEPT

CONSTANTS- AMOUNT OF FOOD

HYPE- IF THE DOG EXERCISES LONGER THEN THE DOG WILL SLEEP LONGER BECAUSE HE HAS EXERTED HIS MUSCLES AND HIS MUSCLES NEED TIME TO REST.

Explanation:

LOGIC

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.