Developing Hypothesis'
What is a hypothesis?
An educated guess or prediction of the answer to the problem/purpose experiment
Would qualitative observations include taste?
Yes, they would
Would rubber be a good conductor?
No, rubber is an insulator
What is a chemical property?
Describes the behaviour of a substance while it reacts with another
Unexpected colour change occurs, what happened?
A chemical change
Is it necessary to have both an independent and dependent variable to make a hypothesis?
What is a quantitative observation?
Ex. "I noticed 5 white spots appear after adding the chemical."
What does the hardness of something mean? (Be appropriate.)
The ability to be scratched by another substance
Iron + oxygen --> Iron Oxide
What is a physical change?
A change in a substance that doesn't produce a new substance
A dependent variable is ______
A variable that depends on the independent variable
The sound of popcorn popping is a ________ property, while the amount is a _______ property.
Qualitative, quantitative
If a material is shiny and melts easily, what physical properties would apply to it?
Lustre, and a low melting/boiling point
Write the word equation for a silver metal mixing with sulfate
Silver metal + Sulfate --> Silver sulfide
Bleaching your hair is considered a _______ change
Chemical
If plants are watered, then they will grow taller.
Would the amount they're watered be the dependent or the independent variable?
Independent
Why would we need to have both qualitative and quantitative data while conducting an experiment?
To provide a complete picture for the experiment conducted
What would be an example of something with LOW optical clarity/opaque?
(dependent on what was said)
Ex. Table, Chair, Pencil, Phones
If a liquid reacts with an acid, while also producing bubbles and an odd unexpected colour, do those observations count as chemical properties?
Yes
While mixing 2 chemicals, a solid unexpectedly formed, that solid is called _______
A Precipitate
If given the independent variable "adding fertilizer" and the dependent variable "plant growth", write a hypothesis for them
If plants receive fertilizer, then they will grow taller, because they have more nutrients
Is there more qualitative or quantitative observations in the following prompt?
"I added 2 grams of blue powder to the liquid. I then watched as the liquid turned red, then yellow in a few seconds."
What physical properties would a wooden table have?Minimum 5 answers, Each answer is worth 100, You do not get 500 for answering only 1 right, you don't get extra for getting more than 5 right.
Not ductile, Opaque, Insulator, Solid, Dull, Mass, Woody <- (smell)
Write the word equation and chemical property for the following: "Oxygen gas and Argon gas mix together in the atmosphere. Nothing new is made."
Oxygen + Argon --> No Reaction
Chemical Property: Not reactive with argon
Salt is poured into boiling water, and the salt disappears, this would be considered a ______ change