Group 1
Group 2
Group 3
Group 4
100
If the current slows down what will happen to the boat?
The barge will move faster.
100
In the formula 5CaSO4, this is the number of oxygen atoms.
What is 20?
100
A substance that undergoes change during a chemical reaction is called this.
What is a reactant?
100
The mass of the rocket is now 760.0 kg and its acceleration is 7.0 m/s2 . How much force is now being applied to the rocket?
5320
200
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
200
C3H8 + 5O2 ----> 3CO2 + 4H2O
How many Oxygen atoms are on the reactants side?
What is 10
200
This type of change occurs when a substance or multiple substances rearrange and a new substance is created.
What is a chemical change?
200
Which observation is an opinion?
4
300
When balancing an equation this type of number CAN be changed (hint - it's can be seen as a large number at the front of the chemical formula)
What is a coefficient?
300
How many atoms of oxygen are in a molecule of glucose, C6H12O6?
What is 6
300
What is the net force?
The box will move to the left with an 8 N force.
300
What does the law of conservation of mass state?
What is mass can never be created nor destroyed
400
When balancing an equation, these numbers can not be changed.
What is a subscript?
400
A solid that forms from a solution during a chemical reaction.
What is a precipitate?
400
What does the formula show about each element in the compound?
the number of atoms of each element
400
What elements are in the following chemical formula K2SO4?
Potassium Sulfur Oxygen
500
Give three examples that a chemical change has taken place.
What is temp. change, color change, odor change, formation of a precipitate, formation of a gas?
500
Which is the BEST way a science student can help to maintain laboratory equipment?
clean up all materials and workspaces after investigations
500
What is the formula for speed?
What is Distance/Time
500
How many atoms of each element are in the flowing chemical formula? K2SO4
K=2 S=1 O=4