Grab bag
You mix gravel in with water, what kind of mixture is it?
Heterogeneous
A pure substance that cannot be broken down into simpler substances by chemical means.
Element
Give an example of a physical change.
ice melting
water boiling
Anything where the substance just changes state and can change back.
What's the formula for speed?
S=D/T
Newton's first law is also known as the law of.....
Inertia
What does a curved line mean on a distance/time graph?
It's speeding up or slowing down.
Is NaCL a compound, a molecule or an element?
Both a compound and a molecule.
What is the solvent in an aqueous solution?
Water
What's the difference between speed and velocity?
Velocity includes a direction.
Which object has the most inertia? A cat, a toaster, a bowling ball or a truck?
Truck
What three things could change the rate of dissolution?
surface area
temperature
agitation/stirring
How many elements are in glucose - C6H12O6?
Three
If you make salt water by mixing salt and water, what is the solute?
Salt
If a car travels 150 miles in 3 hours, what is it's average speed?
50 miles per hour
What unit is speed measured in for science?
meters/second
What's the difference between displacement and distance?
Distance is the total length traveled. Displacement is the distance and direction from where something started to where it ended.
What is the primary difference between a compound and a mixture?
Compounds are chemically bonded; mixtures are physically combined.
When you mix vinegar and soda together, it fizzes and the temperature drops. Is this a chemical or physical change?
Chemical
On a distance/time graph, what does the steepness of the line tell you?
The steeper the line, the faster.
If you are traveling 60 mph, how long will it take you to go 600 miles?
10 hours
How can you calculate speed using a distance/time graph?
Calculate the slope. Rise divided by run.
How many atoms of oxygen are in
2H2SO4
8
List the five evidences of a chemical change.
City Girls Love Their Phones
Color, Gas, Light, Temperature, Precipitate
On a distance/time graph, what does a flat line tell you?
If you are pushing your friend 40 N to the left and they are pushing back 30 N to the right, what is the force and is it balanced?
10 Newtons left
no