2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Vocabulary 1 Vocabulary 2 Light & Heat 1 Light & Heat 2 Potpourri
What is refraction?
Light bending when it changes speed
What is radiation?
The movement of heat without matter (no matter in space)
Define convection
The movement of heat in liquids and gases
Define light
A form of energy that can travel through space
What is waste heat?
Heat that can’t be used to do work
What is reflection?
Light bouncing off an object
What is energy transfer?
The change of energy from one form to another.
Define conduction
The way heat travels through materials that are touching.
Define opaque
Can not see through this object
What is transparent?
One can see through this object
If you pull down a window shade to block the sunlight, what would describe the window shade?
opaque
You place a pan onto a hot electric stove burner. How does the stove heat the pan?
conduction
What happens to light when it hits a mirror?
It reflects
Imagine having 3 coffee cups in front of you. The first is smaller, but very hot. The second is larger, and also very hot. The third is also large, but cooler in temperature. Which cup has the most energy? 1, 2, or 3
The 2 nd. It is large and very hot.
Which example of matter would carry heat by convection? a. cake b. soda c. dirt d. rocks
Soda, it travels through liquids and gases
When a thermometer is warmed, the liquid inside of it rises. What is happening to the particles of the liquid to make it rise?
They have a lot of energy
You are standing next to a hot oven. The oven door is closed, but you can feel its heat. How are you feeling the heat?
Through waste heat and conduction
What does temperature measure?
The average energy of particles in matter.
Imagine placing a piece of metal into a container of water. The temperature of the water rises (warms up). What can you infer (guess) about what the original temperature of the metal and the water?
When the metal was first placed into the water, it was warmer than the water. The water temperature rose as heat was transferred from the metal to the water.
You and your friend are standing outside by the fourth grade doors. You are standing in the shade by the door, but your friend is standing in the middle of the blacktop in the sun. Who can see the sun? Explain.
Your friend can see the sun since light travels in a straight line directly to their eyes, and nothing is blocking the sun from their eyes.
Image you have 2 solar cookers in front of you. One is clean and shiny. The other is dirty and dull. Everything else about the cookers is the same. 1.Which cooker do you think will reach a higher temperature? 2.Explain why the cooker you chose will reach a higher temperature.
1.The clean, shiny cooker. 2. The shiny cooker reflects more light and heat, so there is more energy to raise the temperature.
How many degrees are in a right angle?
90 degrees
Estimate to the nearest hundredth:
45.57
What is the measure of the angles of a triangle?
180 degrees
How many cm in 50 m?
5,000