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30 Cards in this Set

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Write the 6 steps of the scientific method IN ORDER
Ask a question, form a hypothesis, test the hypothesis, analyze results, draw a conclusion, communicate results
Define matter.
everything around us (anything with mass that takes up space)-includes solids, liquids and gases
What is a physical property?
Something that you can see or measure
List 2 chemical properties.
flammability, reactivity
List 6 physical properties.
Texture, color, shape, volume, mass, density, melting point, boiling point, freezing point, weight, flexibility
What is a physical change?
A change where the substance does not change.
List 2 examples of physical changes.
Smelly socks (still socks, just smelly ones), painting a car (still a car), ripping paper in half
What is a chemical change?
A change where a new substance is formed
List 2 examples of chemical changes.
Rust on a car, baking cookies or cakes, burning paper, burning a pencil
Define mass.
The amount of matter something has.
Define volume.
The amount of space something takes up.
Define length
The distance between two points.
What is the SI unit for mass?
Gram (g)
What is the SI unit for volume?
Liters (L) or cubic meters (m3)
What is the SI unit for length?
Meters (m)
How do you measure volume?
Using a ruler or a graduated cylinder
How do you measure mass?
Using a triple beam balance
Define temperature.
How fast molecules are moving.
Define pressure.
The number of collisions between molecules.
Describe the relationship between temperature and pressure. (What happens when temperature goes up?)
When temperature goes up, pressure goes up.
Describe the relationship between temperature and volume. (What happens when temperature goes up?)
When temperature goes up, volume goes up.
What happens at absolute zero?
Molecules completely stop moving. 0 K is the temperature that this happens at
What is the formula for density?
Mass divided by volume.
What is the density of oil with a mass of 4000 g and a volume of 5000 mL?
4/5 g/mL (0.80 g/mL)
What is the density of a cube of dry ice with a mass of 231 g and a volume of 300 mL?
231 divided by 300 = 0.77 g/mL
What is the density of water?
1 g/mL
What happens to an object when it is placed in a pool and the object has a density of 9 g/mL? Why?
It sinks because its density is higher than 1 g/mL (which is what water is)
What happens to an object when it is placed in a pool and it has a density of 0.8 g/ml?
It floats because its density is lower than 1 g/mL
Is oil more or less dense than water? Why?
Less dense because it floats in water
If an object floats in water is it more or less dense than water?
It is less dense than water.