Measurement
Is it dense?
Calculate, calculate
Changes
Mixture this?
100
What is matter?
Has mass and takes up space.
100
What is a density column?
100
Describe how you would calculate the volume of an irregularly shaped solid? Use science vocab.
Use a graduated cylinder to measure the volume using the water displacement method. Fill it to a certain amount. Put in the object. The number of mL the water rises is the volume.
100
What is a physical change in an object/substance? List 5-10 examples
In a physical change substances do not change into other substances.
a. Water can change from a liquid to a solid b. Rocks can be crushed c. Paper can be torn d. Metal can be bent e. Boiling water
100
Explain the 3 different types of mixtures.
Solution: mixtures in which one substance, called the solute, is completely dissolved into another substance, called the solvent. (homogenous) Colloid: In a colloid, the particles are well mixed but not dissolved.
200
Grams are used to define this
What are the units to define mass?
200
What is the density of water?
1.0 g/ml
200
How do you calculate volume of a rectangular solid?
L x W x H
200
What are mixtures? What are the 2 categories that describe all types of mixtures?
Mixture: A combination of substances that can be physically separated from one another. All mixtures are either homogeneous or heterogeneous.
200
What mixture is heterogeneous?
Heterogeneous: The particles in a colloid will remain combined.
300
What are the units we use to define volume?
cm3 or mL3
300
What is the formula for density?
D=m/v
300
How do you find the mass of an object?
Use a balance scale; put the object on one side and gram stackers on the other side to balance the scale
300
What is a chemical change in an object/substance? List 5-10 examples
During a chemical change, substances react and form new substances.
a. Rusting b. Cooking c. Baking d. Burning e. Sun fading colored objects
300
What mixture is homogenous?
Heterogeneous: Suspension: Some of the particles in a suspension will eventually settle out?
400
What are the three states of matter?
Solid- substances with a fixed shape and volume Liquid- substances that have a fixed volume, but no fixed shape Gas- substances with no fixed volume or shape
400
Is density a physical or chemical property of matter?
Physical property; The physical properties of matter are properties that can be observed or measured without changing the identity of the substance.
400
Describe why something would float instead of sink. (Make sure to use density as part of your description
The density of water is 1 g/mL. An object with a density greater than 1 g/mL will sink. An object with a density of less than 1 g/mL will float.
400
Explain what happens in an endothermic reaction. Give two examples.
The energy increases over time as heat is absorbed (stolen) for the surroundings. The reaction is cold.
a. Instant Ice packs b. Combining Salt and ice
400
What is mass?
The amount of matter in an object.
500
How do you find the mass of an object?
Use a balance scale; put the object on one side and gram stackers on the other side to balance the scale.
500
Can you define density in a complete sentence.
An object's mass divided by its volume; a measure of how many particles are packed together into a certain amount of space.
500
When is Dr. Seuss' birthday?
March 2
500
Explain what happens in an exothermic reaction. Give two examples.
The energy decreases over time as heat is released. The reaction is hot.
a. Combining calcium chloride and water b. Instant hand warmers
500
What is volume?
The amount of space an object or substance takes up.