How is heat measured? CALORIES unit of heat 1 calorie = 4.184 J Amount of heat needed to raise the temp of 1g of water 1°C
1000 calories (1 kilocalorie) = 1 food Calorie
Your body uses the calories in food for heat and energy. Some foods contain more calories than others, and therefore provide your body with a concentration of energy. Foods that are high in calories contain large amounts of chemical energy, often more than your body can properly break down and use. What's left over is often stored as fat. That's why people on diets avoid foods that are high in calories.
TOPIC: Heat AIM: What is thermal expansion?
Thermal Expansion Expansion (increase in size) of a substance caused by heat Temp increases molecules move faster & farther apart
Examples: 1. The rising of mercury/ alcohol in a thermometer
2. Hot air balloons rise because heated air expands
When both ball and ring are at room temperature, the ball fits through the ring. When the ball is heated, it no longer fits due to thermal expansion.
Spaces between the joints allow the metals in the bridge to expand.
Summary: Recap lesson Read article on thermometer and absolute zero Paraphrase partners?