law of something
Which part of the atom is responsible for its reactivity?
Valence electron
How many Hydrogen are in H2O
2
A speed boat travels 200 miles at a speed of 20 miles/hr. How much time will it take to travel the 200 miles?
10 hrs
What does no motion on a distance/time chart look like?
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The box is being pushed to the right with a force of 300 newtons, and to the left with a force of 400 newtons.
What is the net magnitude on the box
100N L
unexpected color change, formation of a precipitate, formation of a gas, odor change, temperature change and production of light/fire.
Carbon - 6
Hydrogen - 12
Oxygen - 6
Where on a track are you accelerating if you are running at a constant speed?
What does no motion look like on speed/time chart?
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When two liquid makes a solid during a chemical reaction what is this evidence called?
Precipitation
Going from a solid and melting into a liquid then evaporating into gas then condensation back to a liquid is what type of change?
Physical
What is the left part of a chemical equation called?
2H2 + O2 ---> 2H2O
Reactants
Soccer ball A goes 15 feet in 3 seconds, and Ball B goes 12 feet in 2 seconds. Which ball moved the fastest?
Soccer Ball B
What does a negative sloped line mean on a distance vs time graph?
Which of the following are indicators that an object is experiencing unbalanced forces?
Select TWO correct answers.
1- An object is changing its direction.
2 -An object is moving at a constant speed.
3- An object is stationary.
4- An object is speeding up.
5- An object is slowing down.
1,4,5
When baking a cake name one evidence of a chemical reaction.
smell, gas, taste, look (unexpected color change)
Is the following equation balanced?
2C2H2 + 5O2 ---> 4CO2 + 2H2O
Yes
A runner runs three different times
Time Distance
Trail 1 - 10min 2 miles
Trail 2- 15min 3 miles
Trail 3- 20min. 4 miles
What is his average speed?
5mph
A student rides the Ferris wheel when visiting an amusement park. During the ride, she moves at a constant speed of 3m/s.
Describe where you would be experiencing an unbalanced force
How many bones are in the human body?
206
What type of change(s) happens when you are eating?
Must explain how the change is happening
Physical - when chewing or pushing your food down your throat
Chemical - when saliva combines with your food or when your stomach acid starts to break down the food
Balance this equation
__CO + __Fe2O3--> __Fe + __CO2
_3_CO + _1_Fe2O3--> _2_Fe + _3_CO2
John can type 960 words in 20 mins
calculate his typing speed in 1 hour
960/20= 48 words per minute
48 X 60 = 2880 words per hour
Which planet is known as the “Morning Star” or “Evening Star”
Venus
What is the SI unit of temperature?
Kelvin