🎊 Review 1&2 🎊 Flashcards
(22 cards)
1kg = _____g
1,000g
1m = _____cm
100cm
1L = _____ mL
1,000mL
Observation def?
A factual statement based on information gained through your senses or tools. (Factual)
Inference def?
A conclusion made based on observations and reasoning. (Belief)
Hypothesis def?
A prediction of a future event based on your knowledge of factors (characteristics) that could affect the outcome. (Prediction)
Metric units for:
Length_____
Force_____
Mass_____
Volume_____
Speed_____
Weight_____
Density_____
Acceleration_____
Temperature_____
Length: Meters
Force: Newtons
Mass: Gram
Volume: cm³ or mL
Speed: m/s
Weight: Newtons
Density: g/cm³
Acceleration: m/s/s
Temperature: 0^ C
Volume definition?
The amount of space matter occupies.
Matter def?
The atoms everything is made of.
Atoms def?
The smallest possible particle that is matter.
Molecules def?
Two or more ATOMS bonded together.
Compounds def?
Two or more ELEMENTS bonded together.
Elements def?
One type of atom.
Mixture vs Compound?
Mixtures are two or more substances that are NOT chemically bonded together, compounds are elements that ARE chemically bonded together.
Mass def? What’s it measured with?
The amount of matter that something is made of.
A balance.
Weight def? What’s it measured with?
A measurement of the pull of gravity on an object.
A scale.
Solids: Fixed volume? Definite shape? Movement of particles? Attractions btw particles?
Liquids: Fixed volume? Definite shape? Movement of particles? Attractions btw particles?
Gases: Fixed volume? Definite shape? Movement of particles? Attractions btw particles?
Solids: Yes, Yes, constantly vibrates in place, strong attraction.
Liquids: Yes, No-takes shape of container, slid ast each other maintaining contact (flow), slightly weaker.
Gas: No (COMPRESSIBLE), No fills and scatter in container, moves freely, collides randomly, atoms don’t stick, very weak attraction.
Density def? What does it depend on?
How closely packed molecules are in a substance. Depends on what something is made of, not the size.
How does the density of a pure substance change if you cut it into pieces?
It remains the same even if you separate it into pieces since density is constant and unique and is a characteristic property.
Density and floating?
Less dense, floats.
Very dense, sinks.
Chemical property def?
Properties where it changes the substance into something new when observed. Like reactivity and flammability.
What is a characteristic property?
Characteristic properties are any properties that are constant and unique, these properties are helpful for identifying substances. CAN be chemical or physical.
