Energy plus 2 odd ball
Which forms of energy are produced when a bat hits a ball?
sound and mechanical
rubbing a balloon on your shirt creates a charge. when you put the balloon by pieces of paper, they move. why does the paper move?
objects with opposite charges repel
a charged object can attract an uncharged object
a charged object transfers ts charge t uncharged objects
a charged object can attract an uncharged object
a gas takes the shape of its container true or false
true!
In order for a question to be considered an experimental question, what should you be able to do with the question?
pull out ALL variables
you should have a dependent, independent, and constant
Only ONE think can change....you have to be able to TEST it!
Why is moving a smooth box easier that moving a jagged rock? *same weight*
the smooth box has less friction force acting on it
Which does NOT show change?
a girl pushing a kickball
a bowling ball falling on a car
a tennis ball sitting on a shelf
a tennis ball sitting on a shelf
When do charges move away from each other?
1 + +
2 + -
3 -+
4 - -
1 and 4
repelling charges are when they are the SAME
--- because opposites attract
water boiling
juice freezing
ice cream melting
water vapor condensing
water boiling
If you were sent Mrs. Rogers through the same maze 5 times, what most likely would you observe each time?
She completes the maze faster each time. (same maze, I will start to remember the way out a little better each time)
Will a smooth surface like wax paper, increase or decrease the force of friction?
decrease
this means something ridged will INCREASE the force of friction
describe the energy transfers that happen when a hair dryer is turned on
electrical energy is changed into mechanical, which makes the motor in the hair dryer move
yes, heat is involved but the electrical has to MOVE the fan on the inside.
Why is it important that people that work with electricity have tools with rubber or plastic handles?
plastic and rubber are insulators and helps them stay safe when coming in contact with electricity
how do you separate iron fillings from a mixture?
magnet
Why is it important when repeating someone else's experiment to follow each step and not skip any?
because your results may differ
If at first I push Aiden in a rolling chair with the force of 1 Newton...then Mr. Rogers joins us and pulls Aiden at the force of 2 Newtons in the same directions of motion, what is the result?
what is the SMALLEST unit of matter?
an atom
What could keep a closed circuit from working?
examples: no battery, missing wire, switch not closed, wire not connected
sugar and water are mixed into a plate and left outside in the sun. describe what happens after a few days.
the water will evaporate leaving the sugar behind
What type of energy is generated when you rub your hands together?
heat energy
If I hit a volleyball one time with force, then hit it a second time the force is increased, how has the motion changed?
It will move a greater distance with a greater speed
How can I slow down the process created within a compost pile?
lower surrounding temperatures
make a smaller pile
turn the pile over
introduce worms
lower surrounding temperature
*think mashed potatoes--if I put them in the fridge they will cool down making the inside cool down....we want a compost pile to heat up to break things down*
which list does conduct electricity?
rubber cable, copper cable, plastic cable
gold cable, steel cable, copper cable
rubber cable, gold cable, copper cable
gold cable, steel cable, copper cable
Ashton is trying to decide which substances dissolve into water. He has koolaid, oil, and salt. Which should be NOT choose?
oil- it will not dissolve into water
Why do windows fog in your bathroom at times?
evaporated moisture condenses on the window
How can you dissolve substances into water faster?
stir it or add warm/hot water