unit 1
Are elements made from a mixture?
No
I place ice cubes in warm water what kind of change is this?
Physical
What is the formula for speed?
Distance divide by time.
A kid is doing a wall sit is it balanced or unbalanced?
Balanced
The heat coming from touching a cup?
Conduction?
Give me any compound?
See results here.
Lighting a candle would be what kind of change?
Chemical
5m/s
A car is speeding up? Balanced or unbalanced
Unbalanced
Wood on fire is what kind of heat transfer?
Conduction, convection and radiation.
How many elements are in ethanol?
C2H5OH
3
Fungus decomposing organic matter?
Chemical or physical
A student ran 14 kilometers in 2 hours what is the average speed?
7Km/hr
What is stopping the car from rolling down the hill?
Friction
A hot air balloon shows what kind of heat transfer?
Convection.
How many atoms are in
NaHCO3
6
Food coloring in water?
Chemical or physical
Physical.
A horse gallops at 40km/hr? what is the velocity?
What is the difference between distance and displacement?
Distance is how long it takes to get from point a to point b.
Displacement is the shortest path from point a to b.
Heat from the table to the ice cube.
Which group of elements on the periodic table are the most reactive?
Group 1 or alkaline metals.
How do we speed up things dissolving in water?
Heat and stirring
2 kilometes in 30 minutes what is the average speed?
Has to be in mph?
4 kmph
What properties change with an unbalanced forces?
Speed an direction
Temperature increase.