This is just what we see with our senses about the world around us.
What is an observation
100
How does adding paper clips affect the time it takes for a paper clip to fall? This is an example of?
What is a testable question.
100
This is the most basic unit of an element. It has protons, Neutrons, and electrons
What is an atom.
100
This is a change in the appearance of the object, but not its composition (what it is made of). In short, it is the same substance.
What is a physical change.
100
How fast / slow a reaction occurs.
Ex: It took 30 seconds for the vinegar to dissolve the baking soda.
What is Reaction Rate.
200
This is when we use our minds to make sense of our observations.
What is an inference
200
The variable that I change. This is also the cause in our experiment
What is an independent variable
200
Theses are the simplest substances in the known universe. There are roughly 144 of them, and they are organized on a periodic table.
What are elements?
200
This is a change in the composition of the object. Atoms from different elements combine to form a NEW substance.
What is a chemical change.
200
This form of a material allows us to have the fastest reaction rate because of the increased surface area.
What is a Powder
300
This is an example of what. I see that the Grasshopper is 6 cm long.
What is an observation.
300
The variable that is affected by the independent variable. This is the effect of our experiment
What is a dependent variable.
300
This is the number at the top of the element box, and lets us know how many protons the atom has.
What is the atomic number
300
Bubbles, flammability, color change, and rust are all examples of ______________________
What are chemical changes.
300
This type of reaction RELEASES HEAT into the environment. Thus, making the environment warmer
Ex: Fire
What is an EXOTHERMIC REACTION.
400
Put the inference and the observation in order.
The baby is burping, so it must have just eaten.
What is 1. Observation, 2. Inference
400
This variable is a constant in our experiment
What is A control variable
400
This is the number at the bottom of the element box, and gives us the number of Protons AND neutrons in the atom.
What is the atomic weight.
400
You need both answers in the right order for credit.
1. These are the substances before the Chemical reaction
2. These are the NEW substance(s) created after the chemical reaction
What are 1. REACTANTS 2. PRODUCTS
400
This reaction absorbs (takes in) heat from the environment, making the surroundings colder.
ex: Ice pack
What is an ENDOTHERMIC REACTION
500
After making a campfire, the students observed that the wood had became a different substance. This is an example of??
What is a Chemical Change.
500
Based on our results, the ice cream froze faster when we used rock salt compared to when we used table salt.
What is a conclusion
500
In an ELECTRICALLY NEUTRAL ATOM, the number of protons is the same as the number of ________________. These also have a negative charge.
What are electrons
500
This law states that the mass of the reactants = the mass of the products.
What is the CONSERVATION OF MASS
500
Choose from the answers below. What will have the fastest reaction time of salt.
a. powdered salt
b. 1 rock of salt
c. 2 rocks of salt
d. 3 rocks of salt.