Nature of Science/Independent and Dependant variables
What is Scientific law?
What will happen; predictable outcomes
What is chemistry?
The study of matter and energy and the interactions between them .
What is the most common state of matter to find on earth?
Gas.
What are 2 properties of matter for physical traits and chemical traits?
Physical-s size, shape, color odor, texture, hardness, ability to dissolve, and conductivity.
Chemical- Reactivity and flammability.
What is the phase change when liquid goes to solid and an example ?
Freezing- water turns to ice
What is a Scientific Theory ?
Why something happens; Explanation of nature
What is matter?
Any substance that takes up space and has mass.
What is the speed of movement for solids, liquids and gases?
Solid- slow
Liquid-moderate
Gas-fast
What is the freezing, melting and boiling point of water ?
Freezing point- 0 degrees celsius
Melting point - 0 degrees celsius
Boiling point - 100 degrees celsius
What is the phase change when liquid turns into gas and an example ?
Vaporization -water boils and turns into steam.
What is the difference between the "Control" and "Variable" in an experiment.
A control is something that will remain the same throughout the experiment. A variable is factors that can affect the result.
What are the three main states of matter?
Solid, liquid and gas.
Do gasses have a definite shape,definite volume and does it take shape of the container its in?
Definite shape- no.
Definite volume- ONLY WHEN CONTAINED!!!!!
Take shape of the container its in- yes.
What are some signs (4) that chemical change happend ?
1. Color change
2. Gas bubbles are released
3. light is produced
4. Temperature change
Whats sublimation and ionization and an example for sublimation?
Sublimation - solid goes to gas - Dry Ice turns to gas
Ionization- gas to plasma
What is the difference between a dependant and independent variable ?
A independent variable is what you change during a experiment. A dependant variable is the outcome based on the independent variable.
What are the other 2 states of matter that are not as well known
Plasma an Bose-einstein condensate (BEC)
What is plasma and give 2 examples of plasma , one earth and one not in earth.
Plasma- similar to gasses but particles are different (hotter)
EX1. on earth - neon signs , northern lights, florescent lights, lightning , plasma balls
EX2. off earth- stars
T or F : When matter changes, it cannot undergo both physical and chemical change at the same time?
False, when matter changes, it can undergo both physical and chemical change at the same time.
Whats deposition and deionization and an example for deposition?
deposition - gas to solid - a fire extinguisher
deionization -plasma to gas
Read the scenario below and identify the independent and dependant variable . "A student wants to know if the type of liquid used to water a plant affects how tall it grows. She waters three identical tomato plants with either water, apple juice, or milk for two weeks."
What determines a materials state of matter ?
The motion of particles and strength of attraction between particles determine a materials state.
What is the difference between cohesive and adhesive?
Cohesive- force holds liquid molecules together
Adhesive- force hold liquid molecules to other surfaces
What is the law of conservation of mass?
A rule that states mass can neither be created nor destroyed, only rearranged.
What temperature does condensation happen at ?
0 - 100 degrees celsius